The directed transport of ORGANELLES and molecules along nerve cell AXONS. Transport can be anterograde (from the cell body) or retrograde (toward the cell body). (Alberts et al., Molecular Biology of the Cell, 3d ed, pG3)
Nerve fibers that are capable of rapidly conducting impulses away from the neuron cell body.
The movement of materials (including biochemical substances and drugs) through a biological system at the cellular level. The transport can be across cell membranes and epithelial layers. It also can occur within intracellular compartments and extracellular compartments.
The movement of materials across cell membranes and epithelial layers against an electrochemical gradient, requiring the expenditure of metabolic energy.
A microtubule-associated mechanical adenosine triphosphatase, that uses the energy of ATP hydrolysis to move organelles along microtubules toward the plus end of the microtubule. The protein is found in squid axoplasm, optic lobes, and in bovine brain. Bovine kinesin is a heterotetramer composed of two heavy (120 kDa) and two light (62 kDa) chains. EC 3.6.1.-.
Type III intermediate filament proteins that assemble into neurofilaments, the major cytoskeletal element in nerve axons and dendrites. They consist of three distinct polypeptides, the neurofilament triplet. Types I, II, and IV intermediate filament proteins form other cytoskeletal elements such as keratins and lamins. It appears that the metabolism of neurofilaments is disturbed in Alzheimer's disease, as indicated by the presence of neurofilament epitopes in the neurofibrillary tangles, as well as by the severe reduction of the expression of the gene for the light neurofilament subunit of the neurofilament triplet in brains of Alzheimer's patients. (Can J Neurol Sci 1990 Aug;17(3):302)
A nerve which originates in the lumbar and sacral spinal cord (L4 to S3) and supplies motor and sensory innervation to the lower extremity. The sciatic nerve, which is the main continuation of the sacral plexus, is the largest nerve in the body. It has two major branches, the TIBIAL NERVE and the PERONEAL NERVE.
The process of moving proteins from one cellular compartment (including extracellular) to another by various sorting and transport mechanisms such as gated transport, protein translocation, and vesicular transport.
The 2nd cranial nerve which conveys visual information from the RETINA to the brain. The nerve carries the axons of the RETINAL GANGLION CELLS which sort at the OPTIC CHIASM and continue via the OPTIC TRACTS to the brain. The largest projection is to the lateral geniculate nuclei; other targets include the SUPERIOR COLLICULI and the SUPRACHIASMATIC NUCLEI. Though known as the second cranial nerve, it is considered part of the CENTRAL NERVOUS SYSTEM.
A family of multisubunit cytoskeletal motor proteins that use the energy of ATP hydrolysis to power a variety of cellular functions. Dyneins fall into two major classes based upon structural and functional criteria.
The recording of wavelike motions or undulations. It is usually used on arteries to detect variations in blood pressure.
The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.
Slender, cylindrical filaments found in the cytoskeleton of plant and animal cells. They are composed of the protein TUBULIN and are influenced by TUBULIN MODULATORS.
The movement of ions across energy-transducing cell membranes. Transport can be active, passive or facilitated. Ions may travel by themselves (uniport), or as a group of two or more ions in the same (symport) or opposite (antiport) directions.
Membrane proteins whose primary function is to facilitate the transport of molecules across a biological membrane. Included in this broad category are proteins involved in active transport (BIOLOGICAL TRANSPORT, ACTIVE), facilitated transport and ION CHANNELS.
Vesicles that are involved in shuttling cargo from the interior of the cell to the cell surface, from the cell surface to the interior, across the cell or around the cell to various locations.
'Nerve tissue proteins' are specialized proteins found within the nervous system's biological tissue, including neurofilaments, neuronal cytoskeletal proteins, and neural cell adhesion molecules, which facilitate structural support, intracellular communication, and synaptic connectivity essential for proper neurological function.
Specific particles of membrane-bound organized living substances present in eukaryotic cells, such as the MITOCHONDRIA; the GOLGI APPARATUS; ENDOPLASMIC RETICULUM; LYSOSOMES; PLASTIDS; and VACUOLES.
A superorder of CEPHALOPODS comprised of squid, cuttlefish, and their relatives. Their distinguishing feature is the modification of their fourth pair of arms into tentacles, resulting in 10 limbs.
Proteins that are involved in or cause CELL MOVEMENT such as the rotary structures (flagellar motor) or the structures whose movement is directed along cytoskeletal filaments (MYOSIN; KINESIN; and DYNEIN motor families).
High molecular weight proteins found in the MICROTUBULES of the cytoskeletal system. Under certain conditions they are required for TUBULIN assembly into the microtubules and stabilize the assembled microtubules.
A species in the family AOTIDAE, inhabiting the forested regions of Central and South America (from Panama to the Amazon). Vocalizations occur primarily at night when they are active, thus they are also known as Northern night monkeys.
Microtubule-associated proteins that are mainly expressed in neurons. Tau proteins constitute several isoforms and play an important role in the assembly of tubulin monomers into microtubules and in maintaining the cytoskeleton and axonal transport. Aggregation of specific sets of tau proteins in filamentous inclusions is the common feature of intraneuronal and glial fibrillar lesions (NEUROFIBRILLARY TANGLES; NEUROPIL THREADS) in numerous neurodegenerative disorders (ALZHEIMER DISEASE; TAUOPATHIES).
A major alkaloid from Colchicum autumnale L. and found also in other Colchicum species. Its primary therapeutic use is in the treatment of gout, but it has been used also in the therapy of familial Mediterranean fever (PERIODIC DISEASE).
Procedures that stimulate nerve elongation over a period of time. They are used in repairing nerve tissue.
Sensory ganglia located on the dorsal spinal roots within the vertebral column. The spinal ganglion cells are pseudounipolar. The single primary branch bifurcates sending a peripheral process to carry sensory information from the periphery and a central branch which relays that information to the spinal cord or brain.
The rate dynamics in chemical or physical systems.
A microtubule subunit protein found in large quantities in mammalian brain. It has also been isolated from SPERM FLAGELLUM; CILIA; and other sources. Structurally, the protein is a dimer with a molecular weight of approximately 120,000 and a sedimentation coefficient of 5.8S. It binds to COLCHICINE; VINCRISTINE; and VINBLASTINE.
Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others.
The delicate interlacing threads, formed by aggregations of neurofilaments and neurotubules, coursing through the CYTOPLASM of the body of a NEURON and extending from one DENDRITE into another or into the AXON.
Transport proteins that carry specific substances in the blood or across cell membranes.
A large group of membrane transport proteins that shuttle MONOSACCHARIDES across CELL MEMBRANES.
Loss of functional activity and trophic degeneration of nerve axons and their terminal arborizations following the destruction of their cells of origin or interruption of their continuity with these cells. The pathology is characteristic of neurodegenerative diseases. Often the process of nerve degeneration is studied in research on neuroanatomical localization and correlation of the neurophysiology of neural pathways.
Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Each mitochondrion is surrounded by a double limiting membrane. The inner membrane is highly invaginated, and its projections are called cristae. Mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of ATP. They contain distinctive RIBOSOMES, transfer RNAs (RNA, TRANSFER); AMINO ACYL T RNA SYNTHETASES; and elongation and termination factors. Mitochondria depend upon genes within the nucleus of the cells in which they reside for many essential messenger RNAs (RNA, MESSENGER). Mitochondria are believed to have arisen from aerobic bacteria that established a symbiotic relationship with primitive protoeukaryotes. (King & Stansfield, A Dictionary of Genetics, 4th ed)
Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.
Neurons which activate MUSCLE CELLS.
A single-pass type I membrane protein. It is cleaved by AMYLOID PRECURSOR PROTEIN SECRETASES to produce peptides of varying amino acid lengths. A 39-42 amino acid peptide, AMYLOID BETA-PEPTIDES is a principal component of the extracellular amyloid in SENILE PLAQUES.
A furanyl adenine found in PLANTS and FUNGI. It has plant growth regulation effects.
Treatment of muscles and nerves under pressure as a result of crush injuries.
Neurons of the innermost layer of the retina, the internal plexiform layer. They are of variable sizes and shapes, and their axons project via the OPTIC NERVE to the brain. A small subset of these cells act as photoreceptors with projections to the SUPRACHIASMATIC NUCLEUS, the center for regulating CIRCADIAN RHYTHM.
The process by which ELECTRONS are transported from a reduced substrate to molecular OXYGEN. (From Bennington, Saunders Dictionary and Encyclopedia of Laboratory Medicine and Technology, 1984, p270)
Cytoplasmic filaments intermediate in diameter (about 10 nanometers) between the microfilaments and the microtubules. They may be composed of any of a number of different proteins and form a ring around the cell nucleus.
STILBENES with AMIDINES attached.
In tissue culture, hairlike projections of neurons stimulated by growth factors and other molecules. These projections may go on to form a branched tree of dendrites or a single axon or they may be reabsorbed at a later stage of development. "Neurite" may refer to any filamentous or pointed outgrowth of an embryonal or tissue-culture neural cell.
The lipid- and protein-containing, selectively permeable membrane that surrounds the cytoplasm in prokaryotic and eukaryotic cells.
Diseases characterized by a selective degeneration of the motor neurons of the spinal cord, brainstem, or motor cortex. Clinical subtypes are distinguished by the major site of degeneration. In AMYOTROPHIC LATERAL SCLEROSIS there is involvement of upper, lower, and brainstem motor neurons. In progressive muscular atrophy and related syndromes (see MUSCULAR ATROPHY, SPINAL) the motor neurons in the spinal cord are primarily affected. With progressive bulbar palsy (BULBAR PALSY, PROGRESSIVE), the initial degeneration occurs in the brainstem. In primary lateral sclerosis, the cortical neurons are affected in isolation. (Adams et al., Principles of Neurology, 6th ed, p1089)
A member of the alkali group of metals. It has the atomic symbol Na, atomic number 11, and atomic weight 23.
A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company.
Elements of limited time intervals, contributing to particular results or situations.
Neurodegenerative disorders involving deposition of abnormal tau protein isoforms (TAU PROTEINS) in neurons and glial cells in the brain. Pathological aggregations of tau proteins are associated with mutation of the tau gene on chromosome 17 in patients with ALZHEIMER DISEASE; DEMENTIA; PARKINSONIAN DISORDERS; progressive supranuclear palsy (SUPRANUCLEAR PALSY, PROGRESSIVE); and corticobasal degeneration.
A relatively common sequela of blunt head injury, characterized by a global disruption of axons throughout the brain. Associated clinical features may include NEUROBEHAVIORAL MANIFESTATIONS; PERSISTENT VEGETATIVE STATE; DEMENTIA; and other disorders.
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
Proteins found in the microtubules.
Protein analogs and derivatives of the Aequorea victoria green fluorescent protein that emit light (FLUORESCENCE) when excited with ULTRAVIOLET RAYS. They are used in REPORTER GENES in doing GENETIC TECHNIQUES. Numerous mutants have been made to emit other colors or be sensitive to pH.
A complex network of nerve fibers in the pelvic region. The hypogastric plexus distributes sympathetic fibers from the lumbar paravertebral ganglia and the aortic plexus, parasympathetic fibers from the pelvic nerve, and visceral afferents. The bilateral pelvic plexus is in its lateral extent.
A broad category of proteins involved in the formation, transport and dissolution of TRANSPORT VESICLES. They play a role in the intracellular transport of molecules contained within membrane vesicles. Vesicular transport proteins are distinguished from MEMBRANE TRANSPORT PROTEINS, which move molecules across membranes, by the mode in which the molecules are transported.
Proteins which are found in membranes including cellular and intracellular membranes. They consist of two types, peripheral and integral proteins. They include most membrane-associated enzymes, antigenic proteins, transport proteins, and drug, hormone, and lectin receptors.
A degenerative disorder affecting upper MOTOR NEURONS in the brain and lower motor neurons in the brain stem and SPINAL CORD. Disease onset is usually after the age of 50 and the process is usually fatal within 3 to 6 years. Clinical manifestations include progressive weakness, atrophy, FASCICULATION, hyperreflexia, DYSARTHRIA, dysphagia, and eventual paralysis of respiratory function. Pathologic features include the replacement of motor neurons with fibrous ASTROCYTES and atrophy of anterior SPINAL NERVE ROOTS and corticospinal tracts. (From Adams et al., Principles of Neurology, 6th ed, pp1089-94)
Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding.
Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Membrane-bound compartments which contain transmitter molecules. Synaptic vesicles are concentrated at presynaptic terminals. They actively sequester transmitter molecules from the cytoplasm. In at least some synapses, transmitter release occurs by fusion of these vesicles with the presynaptic membrane, followed by exocytosis of their contents.
The network of filaments, tubules, and interconnecting filamentous bridges which give shape, structure, and organization to the cytoplasm.
Naturally occurring or experimentally induced animal diseases with pathological processes sufficiently similar to those of human diseases. They are used as study models for human diseases.
Dyneins that are responsible for intracellular transport, MITOSIS, cell polarization, and movement within the cell.
Laboratory mice that have been produced from a genetically manipulated EGG or EMBRYO, MAMMALIAN.
The largest and uppermost of the paravertebral sympathetic ganglia.
A degenerative disease of the BRAIN characterized by the insidious onset of DEMENTIA. Impairment of MEMORY, judgment, attention span, and problem solving skills are followed by severe APRAXIAS and a global loss of cognitive abilities. The condition primarily occurs after age 60, and is marked pathologically by severe cortical atrophy and the triad of SENILE PLAQUES; NEUROFIBRILLARY TANGLES; and NEUROPIL THREADS. (From Adams et al., Principles of Neurology, 6th ed, pp1049-57)
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
A family of synaptic vesicle-associated proteins involved in the short-term regulation of NEUROTRANSMITTER release. Synapsin I, the predominant member of this family, links SYNAPTIC VESICLES to ACTIN FILAMENTS in the presynaptic nerve terminal. These interactions are modulated by the reversible PHOSPHORYLATION of synapsin I through various signal transduction pathways. The protein is also a substrate for cAMP- and CALCIUM-CALMODULIN-DEPENDENT PROTEIN KINASES. It is believed that these functional properties are also shared by synapsin II.
An enzyme isolated from horseradish which is able to act as an antigen. It is frequently used as a histochemical tracer for light and electron microscopy. Its antigenicity has permitted its use as a combined antigen and marker in experimental immunology.
A genus of small, two-winged flies containing approximately 900 described species. These organisms are the most extensively studied of all genera from the standpoint of genetics and cytology.
The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.
Proteins which are involved in the phenomenon of light emission in living systems. Included are the "enzymatic" and "non-enzymatic" types of system with or without the presence of oxygen or co-factors.
A member of the nerve growth factor family of trophic factors. In the brain BDNF has a trophic action on retinal, cholinergic, and dopaminergic neurons, and in the peripheral nervous system it acts on both motor and sensory neurons. (From Kendrew, The Encyclopedia of Molecular Biology, 1994)
Clusters of multipolar neurons surrounded by a capsule of loosely organized CONNECTIVE TISSUE located outside the CENTRAL NERVOUS SYSTEM.
Hereditary and sporadic conditions which are characterized by progressive nervous system dysfunction. These disorders are often associated with atrophy of the affected central or peripheral nervous system structures.
Cytoplasmic vesicles formed when COATED VESICLES shed their CLATHRIN coat. Endosomes internalize macromolecules bound by receptors on the cell surface.
Membrane proteins whose primary function is to facilitate the transport of negatively charged molecules (anions) across a biological membrane.
A MARVEL domain-containing protein found in the presynaptic vesicles of NEURONS and NEUROENDOCRINE CELLS. It is commonly used as an immunocytochemical marker for neuroendocrine differentiation.
Membrane proteins whose primary function is to facilitate the transport of positively charged molecules (cations) across a biological membrane.
Bulbous enlargement of the growing tip of nerve axons and dendrites. They are crucial to neuronal development because of their pathfinding ability and their role in synaptogenesis.
The part of a cell that contains the CYTOSOL and small structures excluding the CELL NUCLEUS; MITOCHONDRIA; and large VACUOLES. (Glick, Glossary of Biochemistry and Molecular Biology, 1990)
A stack of flattened vesicles that functions in posttranslational processing and sorting of proteins, receiving them from the rough ENDOPLASMIC RETICULUM and directing them to secretory vesicles, LYSOSOMES, or the CELL MEMBRANE. The movement of proteins takes place by transfer vesicles that bud off from the rough endoplasmic reticulum or Golgi apparatus and fuse with the Golgi, lysosomes or cell membrane. (From Glick, Glossary of Biochemistry and Molecular Biology, 1990)
Microscopy of specimens stained with fluorescent dye (usually fluorescein isothiocyanate) or of naturally fluorescent materials, which emit light when exposed to ultraviolet or blue light. Immunofluorescence microscopy utilizes antibodies that are labeled with fluorescent dye.
Renewal or physiological repair of damaged nerve tissue.
Recording serial images of a process at regular intervals spaced out over a longer period of time than the time in which the recordings will be played back.
A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement.
The anterior pair of the quadrigeminal bodies which coordinate the general behavioral orienting responses to visual stimuli, such as whole-body turning, and reaching.
A curved elevation of GRAY MATTER extending the entire length of the floor of the TEMPORAL HORN of the LATERAL VENTRICLE (see also TEMPORAL LOBE). The hippocampus proper, subiculum, and DENTATE GYRUS constitute the hippocampal formation. Sometimes authors include the ENTORHINAL CORTEX in the hippocampal formation.
A nervous tissue specific protein which is highly expressed in NEURONS during development and NERVE REGENERATION. It has been implicated in neurite outgrowth, long-term potentiation, SIGNAL TRANSDUCTION, and NEUROTRANSMITTER release. (From Neurotoxicology 1994;15(1):41-7) It is also a substrate of PROTEIN KINASE C.
A light microscopic technique in which only a small spot is illuminated and observed at a time. An image is constructed through point-by-point scanning of the field in this manner. Light sources may be conventional or laser, and fluorescence or transmitted observations are possible.
The making of a radiograph of an object or tissue by recording on a photographic plate the radiation emitted by radioactive material within the object. (Dorland, 27th ed)
Microscopy in which television cameras are used to brighten magnified images that are otherwise too dark to be seen with the naked eye. It is used frequently in TELEPATHOLOGY.
Established cell cultures that have the potential to propagate indefinitely.
The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.
A family of 3,6-di(substituted-amino)-9-benzoate derivatives of xanthene that are used as dyes and as indicators for various metals; also used as fluorescent tracers in histochemistry.
A cytochrome oxidase inhibitor which is a nitridizing agent and an inhibitor of terminal oxidation. (From Merck Index, 12th ed)
Cellular proteins and protein complexes that transport amino acids across biological membranes.
Agents that emit light after excitation by light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags.
An opisthobranch mollusk of the order Anaspidea. It is used frequently in studies of nervous system development because of its large identifiable neurons. Aplysiatoxin and its derivatives are not biosynthesized by Aplysia, but acquired by ingestion of Lyngbya (seaweed) species.
Proteins that originate from insect species belonging to the genus DROSOPHILA. The proteins from the most intensely studied species of Drosophila, DROSOPHILA MELANOGASTER, are the subject of much interest in the area of MORPHOGENESIS and development.
Peptides generated from AMYLOID BETA-PEPTIDES PRECURSOR. An amyloid fibrillar form of these peptides is the major component of amyloid plaques found in individuals with Alzheimer's disease and in aged individuals with trisomy 21 (DOWN SYNDROME). The peptide is found predominantly in the nervous system, but there have been reports of its presence in non-neural tissue.
The uptake of naked or purified DNA by CELLS, usually meaning the process as it occurs in eukaryotic cells. It is analogous to bacterial transformation (TRANSFORMATION, BACTERIAL) and both are routinely employed in GENE TRANSFER TECHNIQUES.
The introduction of a phosphoryl group into a compound through the formation of an ester bond between the compound and a phosphorus moiety.
Nocodazole is an antineoplastic agent which exerts its effect by depolymerizing microtubules.
The species Oryctolagus cuniculus, in the family Leporidae, order LAGOMORPHA. Rabbits are born in burrows, furless, and with eyes and ears closed. In contrast with HARES, rabbits have 22 chromosome pairs.
Swelling of the OPTIC DISK, usually in association with increased intracranial pressure, characterized by hyperemia, blurring of the disk margins, microhemorrhages, blind spot enlargement, and engorgement of retinal veins. Chronic papilledema may cause OPTIC ATROPHY and visual loss. (Miller et al., Clinical Neuro-Ophthalmology, 4th ed, p175)
Inbred C57BL mice are a strain of laboratory mice that have been produced by many generations of brother-sister matings, resulting in a high degree of genetic uniformity and homozygosity, making them widely used for biomedical research, including studies on genetics, immunology, cancer, and neuroscience.
Factors which enhance the growth potentialities of sensory and sympathetic nerve cells.
Filaments 7-11 nm in diameter found in the cytoplasm of all cells. Many specific proteins belong to this group, e.g., desmin, vimentin, prekeratin, decamin, skeletin, neurofilin, neurofilament protein, and glial fibrillary acid protein.
NERVE GROWTH FACTOR is the first of a series of neurotrophic factors that were found to influence the growth and differentiation of sympathetic and sensory neurons. It is comprised of alpha, beta, and gamma subunits. The beta subunit is responsible for its growth stimulating activity.
The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
An adenine nucleotide containing three phosphate groups esterified to the sugar moiety. In addition to its crucial roles in metabolism adenosine triphosphate is a neurotransmitter.

Localization of sympathetic, parasympathetic and sensory neurons innervating the heart of the Beijing duck by means of the retrograde transport of horseradish peroxidase. (1/1188)

Sympathetic, parasympathetic and sensory neurons were labeled by injections of horseradish peroxidase into various regions of the heart in 33 Beijing ducks. Sympathetic postganglionic neurons innervating the heart were located in the paravertebral ganglia C15 (C16 is the last cervical segment in the duck) to T3, especially in the ganglion T1. The coronary sulcus and ventricle were more abundantly innervated by sympathetic neurons than the atrium. The left side of the heart was preferentially innervated by sympathetic postganglionic neurons in the left side of paravertebral ganglia but the right side of the heart were equally supplied from the right and left ganglia. Within the medulla oblongata, the number of labeled vagal preganglionic neurons in the nucleus ambiguus was much greater than that in the dorsal motor nucleus of the vagus nerve. Labeled neurons of the nucleus ambiguus were found in many ducks injected into the coronary sulcus. Cardiac sensory neurons were observed in the dorsal root ganglia C15 to T2 (highest in the ganglion T1) and in the nodose and jugular ganglia of the vagus nerve. These labeled neurons probably form the afferent and efferent limbs of cardiac reflexes and control circulation in the Beijing duck.  (+info)

Light-induced calcium influx into retinal axons is regulated by presynaptic nicotinic acetylcholine receptor activity in vivo. (2/1188)

Visual activity is thought to be a critical factor in controlling the development of central retinal projections. Neuronal activity increases cytosolic calcium, which was hypothesized to regulate process outgrowth in neurons. We performed an in vivo imaging study in the retinotectal system of albino Xenopus laevis tadpoles with the fluorescent calcium indicator calcium green 1 dextran (CaGD) to test the role of calcium in regulating axon arbor development. We find that visual stimulus to the retina increased CaGD fluorescence intensity in retinal ganglion cell (RGC) axon arbors within the optic tectum and that branch additions to retinotectal axon arbors correlated with a local rise in calcium in the parent branch. We find three types of responses to visual stimulus, which roughly correlate with the ON, OFF, and SUSTAINED response types of RGC reported by physiological criteria. Imaging in bandscan mode indicated that patterns of calcium transients were nonuniform throughout the axons. We tested whether the increase in calcium in the retinotectal axons required synaptic activity in the retina; intraocular application of tetrodotoxin (10 microM) or nifedipine (1 and 10 microM) blocked the stimulus-induced increase in RGC axonal fluorescence. A second series of pharmacological investigations was designed to determine the mechanism of the calcium elevation in the axon terminals within the optic tectum. Injection of bis-(o-aminophenoxy)-N,N,N',N'-tetraacetic acid-AM (BAPTA-AM) (20 mM) into the tectal ventricle reduced axonal calcium levels, supporting the idea that visual stimulation increases axonal calcium. Injection of BAPTA (20 mM) into the tectal ventricle to chelate extracellular calcium also attenuated the calcium response to visual stimulation, indicating that calcium enters the axon from the extracellular medium. Caffeine (10 mM) caused a large increase in axonal calcium, indicating that intracellular stores contribute to the calcium signal. Presynaptic nicotinic acetylcholine receptors (nAChRs) may play a role in axon arbor development and the formation of the topographic retinotectal projection. Injection of nicotine (10 microM) into the tectal ventricle significantly elevated RGC axonal calcium levels, whereas application of the nAChR antagonist alphaBTX (100 nM) reduced the stimulus-evoked rise in RGC calcium fluorescence. These data suggest that light stimulus to the retina increases calcium in the axon terminal arbors through a mechanism that includes influx through nAChRs and amplification by calcium-induced calcium release from intracellular calcium stores. Such a mechanism may contribute to developmental plasticity of the retinotectal system by influencing both axon arbor elaboration and the strength of synaptic transmission.  (+info)

A genetic approach to trace neural circuits. (3/1188)

Mammalian nervous system function involves billions of neurons which are interconnected in a multitude of neural circuits. Here we describe a genetic approach to chart neural circuits. By using an olfactory-specific promoter, we selectively expressed barley lectin in sensory neurons in the olfactory epithelium and vomeronasal organ of transgenic mice. The lectin was transported through the axons of those neurons to the olfactory bulb, transferred to the bulb neurons with which they synapse, and transported through the axons of bulb neurons to the olfactory cortex. The lectin also was retrogradely transported from the bulb to neuromodulatory brain areas. No evidence could be obtained for adverse effects of the lectin on odorant receptor gene expression, sensory axon targeting in the bulb, or the generation or transmission of signals by olfactory sensory neurons. Transneuronal transfer was detected prenatally in the odor-sensing pathway, but only postnatally in the pheromone-sensing pathway, suggesting that odors, but not pheromones, may be sensed in utero. Our studies demonstrate that a plant lectin can serve as a transneuronal tracer when its expression is genetically targeted to a subset of neurons. This technology can potentially be applied to a variety of vertebrate and invertebrate neural systems and may be particularly valuable for mapping connections formed by small subsets of neurons and for studying the development of connectivity as it occurs in utero.  (+info)

NK-1 receptor immunoreactivity in distinct morphological types of lamina I neurons of the primate spinal cord. (4/1188)

In cat and monkey, lamina I cells can be classified into three basic morphological types (fusiform, pyramidal, and multipolar), and recent intracellular labeling evidence in the cat indicates that fusiform and multipolar lamina I cells are two different types of nociceptive cells, whereas pyramidal cells are innocuous thermoreceptive-specific. Because earlier observations indicated that only nociceptive dorsal horn neurons respond to substance P (SP), we examined which morphological types of lamina I neurons express receptors for SP (NK-1r). We categorized NK-1r-immunoreactive (IR) lamina I neurons in serial horizontal sections from the cervical and lumbar enlargements of four monkeys. Consistent results were obtained by two independent teams of observers. Nearly all NK-1r-IR cells were fusiform (42%) or multipolar (43%), but only 6% were pyramidal (with 9% unclassified). We obtained similar findings in three monkeys in which we used double-labeling immunocytochemistry to identify NK-1r-IR and spinothalamic lamina I neurons retrogradely labeled with cholera toxin subunit b from the thalamus; most NK-1r-IR lamina I spinothalamic neurons were fusiform (48%) or multipolar (33%), and only 10% were pyramidal. In contrast, most (approximately 75%) pyramidal and some (approximately 25%) fusiform and multipolar lamina I spinothalamic neurons did not display NK-1r immunoreactivity. These data indicate that most fusiform and multipolar lamina I neurons in the monkey can express NK-1r, consistent with the idea that both types are nociceptive, whereas only a small proportion of lamina I pyramidal cells express this receptor, consistent with the previous finding that they are non-nociceptive. However, these findings also indicate that not all nociceptive lamina I neurons express receptors for SP.  (+info)

Leukemia inhibitory factor augments neurotrophin expression and corticospinal axon growth after adult CNS injury. (5/1188)

The cytokine leukemia inhibitory factor (LIF) modulates glial and neuronal function in development and after peripheral nerve injury, but little is known regarding its role in the injured adult CNS. To further understand the biological role of LIF and its potential mechanisms of action after CNS injury, effects of cellularly delivered LIF on axonal growth, glial activation, and expression of trophic factors were examined after adult mammalian spinal cord injury. Fibroblasts genetically modified to produce high amounts of LIF were grafted to the injured spinal cords of adult Fischer 344 rats. Two weeks after injury, animals with LIF-secreting cells showed a specific and significant increase in corticospinal axon growth compared with control animals. Furthermore, expression of neurotrophin-3, but not nerve growth factor, brain-derived neurotrophic factor, glia cell line-derived neurotrophic factor, or ciliary neurotrophic factor, was increased at the lesion site in LIF-grafted but not in control subjects. No differences in astroglial and microglial/macrophage activation were observed. Thus, LIF can directly or indirectly modulate molecular and cellular responses of the adult CNS to injury. These findings also demonstrate that neurotrophic molecules can augment expression of other trophic factors in vivo after traumatic injury in the adult CNS.  (+info)

Development and organization of ocular dominance bands in primary visual cortex of the sable ferret. (6/1188)

Thalamocortical afferents in the visual cortex of the adult sable ferret are segregated into eye-specific ocular dominance bands. The development of ocular dominance bands was studied by transneuronal labeling of the visual cortices of ferret kits between the ages of postnatal day 28 (P28) and P81 after intravitreous injections of either tritiated proline or wheat germ agglutinin-horseradish peroxidase. Laminar specificity was evident in the youngest animals studied and was similar to that in the adult by P50. In P28 and P30 ferret kits, no modulation reminiscent of ocular dominance bands was detectable in the pattern of labeling along layer IV. By P37 a slight fluctuation in the density of labeling in layer IV was evident in serial reconstructions. By P50, the amplitude of modulation had increased considerably but the pattern of ocular dominance bands did not yet appear mature. The pattern and degree of modulation of the ocular dominance bands resembled that in adult animals by P63. Flat mounts of cortex and serial reconstructions of layer IV revealed an unusual arrangement of inputs serving the two eyes in the region rostral to the periodic ocular dominance bands. In this region, inputs serving the contralateral eye were commonly fused along a mediolateral axis, rostral to which were large and sometimes fused patches of ipsilateral input.  (+info)

Neutralizing antibodies inhibit axonal spread of herpes simplex virus type 1 to epidermal cells in vitro. (7/1188)

The ability of antibodies to interfere with anterograde transmission of herpes simplex virus (HSV) from neuronal axons to the epidermis was investigated in an in vitro model consisting of human fetal dorsal root ganglia innervating autologous skin explants in a dual-chamber tissue culture system. The number and size of viral cytopathic plaques in epidermal cells after axonal transmission from HSV type 1 (HSV-1)-infected dorsal root ganglionic neurons were significantly reduced by addition to the outer chamber of neutralizing polyclonal human sera to HSV-1, of a human recombinant monoclonal group Ib antibody to glycoprotein D (gD), and of rabbit sera to HSV-1 gB and gD but not by rabbit anti-gE or anti-gG. A similar pattern of inhibition of direct infection of epidermal cells by these antibodies was observed. High concentrations of the monoclonal anti-gD reduced transmission by 90%. Rabbit anti-gB was not taken up into neurons, and human anti-gD did not influence spread of HSV in the dorsal root ganglia or axonal transport of HSV antigens when applied to individual dissociated neurons. These results suggest that anti-gD and -gB antibodies interfere with axonal spread of HSV-1, possibly by neutralizing HSV during transmission across an intercellular gap between axonal termini and epidermal cells, and thus contribute to control of HSV spread and shedding. Therefore, selected human monoclonal antibodies to protective epitopes might even be effective in preventing epidermis-to-neuron transmission during primary HSV infection, especially neonatal infection.  (+info)

The GDVII strain of Theiler's virus spreads via axonal transport. (8/1188)

Following intracerebral inoculation, the DA strain of Theiler's virus sequentially infects neurons in the gray matter and glial cells in the white matter of the spinal cord. It persists in the latter throughout the life of the animal. Several observations suggest that the virus spreads from the gray to the white matter by axonal transport. In contrast, the neurovirulent GDVII strain causes a fatal encephalitis with lytic infection of neurons. It does not infect the white matter of the spinal cord efficiently and does not persist in survivors. The inability of this virus to infect the white matter could be due to a defect in axonal transport. Using footpad inoculations, we showed that the GDVII strain is, in fact, transported in axons. Transport was prevented by sectioning the sciatic nerve. The kinetics of transport and experiments using colchicine suggested that the virus uses microtubule-associated fast axonal transport. Our results show that a cardiovirus can spread by fast axonal transport and suggest that the inability of the GDVII strain to infect the white matter is not due to a defect in axonal transport.  (+info)

Axonal transport is the controlled movement of materials and organelles within axons, which are the nerve fibers of neurons (nerve cells). This intracellular transport system is essential for maintaining the structural and functional integrity of axons, particularly in neurons with long axonal processes. There are two types of axonal transport: anterograde transport, which moves materials from the cell body toward the synaptic terminals, and retrograde transport, which transports materials from the synaptic terminals back to the cell body. Anterograde transport is typically slower than retrograde transport and can be divided into fast and slow components based on velocity. Fast anterograde transport moves vesicles containing neurotransmitters and their receptors, as well as mitochondria and other organelles, at speeds of up to 400 mm/day. Slow anterograde transport moves cytoskeletal elements, proteins, and RNA at speeds of 1-10 mm/day. Retrograde transport is primarily responsible for recycling membrane components, removing damaged organelles, and transmitting signals from the axon terminal to the cell body. Dysfunctions in axonal transport have been implicated in various neurodegenerative disorders, such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis (ALS).

An axon is a long, slender extension of a neuron (a type of nerve cell) that conducts electrical impulses (nerve impulses) away from the cell body to target cells, such as other neurons or muscle cells. Axons can vary in length from a few micrometers to over a meter long and are typically surrounded by a myelin sheath, which helps to insulate and protect the axon and allows for faster transmission of nerve impulses.

Axons play a critical role in the functioning of the nervous system, as they provide the means by which neurons communicate with one another and with other cells in the body. Damage to axons can result in serious neurological problems, such as those seen in spinal cord injuries or neurodegenerative diseases like multiple sclerosis.

Biological transport refers to the movement of molecules, ions, or solutes across biological membranes or through cells in living organisms. This process is essential for maintaining homeostasis, regulating cellular functions, and enabling communication between cells. There are two main types of biological transport: passive transport and active transport.

Passive transport does not require the input of energy and includes:

1. Diffusion: The random movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.
2. Osmosis: The diffusion of solvent molecules (usually water) across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
3. Facilitated diffusion: The assisted passage of polar or charged substances through protein channels or carriers in the cell membrane, which increases the rate of diffusion without consuming energy.

Active transport requires the input of energy (in the form of ATP) and includes:

1. Primary active transport: The direct use of ATP to move molecules against their concentration gradient, often driven by specific transport proteins called pumps.
2. Secondary active transport: The coupling of the movement of one substance down its electrochemical gradient with the uphill transport of another substance, mediated by a shared transport protein. This process is also known as co-transport or counter-transport.

Biological transport, active is the process by which cells use energy to move materials across their membranes from an area of lower concentration to an area of higher concentration. This type of transport is facilitated by specialized proteins called transporters or pumps that are located in the cell membrane. These proteins undergo conformational changes to physically carry the molecules through the lipid bilayer of the membrane, often against their concentration gradient.

Active transport requires energy because it works against the natural tendency of molecules to move from an area of higher concentration to an area of lower concentration, a process known as diffusion. Cells obtain this energy in the form of ATP (adenosine triphosphate), which is produced through cellular respiration.

Examples of active transport include the uptake of glucose and amino acids into cells, as well as the secretion of hormones and neurotransmitters. The sodium-potassium pump, which helps maintain resting membrane potential in nerve and muscle cells, is a classic example of an active transporter.

Kinesin is not a medical term per se, but a term from the field of cellular biology. However, understanding how kinesins work is important in the context of medical and cellular research.

Kinesins are a family of motor proteins that play a crucial role in transporting various cargoes within cells, such as vesicles, organelles, and chromosomes. They move along microtubule filaments, using the energy derived from ATP hydrolysis to generate mechanical force and motion. This process is essential for several cellular functions, including intracellular transport, mitosis, and meiosis.

In a medical context, understanding kinesin function can provide insights into various diseases and conditions related to impaired intracellular transport, such as neurodegenerative disorders (e.g., Alzheimer's disease, Parkinson's disease, and Huntington's disease) and certain genetic disorders affecting motor neurons. Research on kinesins can potentially lead to the development of novel therapeutic strategies targeting these conditions.

Neurofilament proteins (NFs) are type IV intermediate filament proteins that are specific to neurons. They are the major structural components of the neuronal cytoskeleton and play crucial roles in maintaining the structural integrity, stability, and diameter of axons. Neurofilaments are composed of three subunits: light (NFL), medium (NFM), and heavy (NFH) neurofilament proteins, which differ in their molecular weights. These subunits assemble into heteropolymers to form the neurofilament core, while the C-terminal tails of NFH and NFM extend outward from the core, interacting with other cellular components and participating in various neuronal functions. Increased levels of neurofilament proteins, particularly NFL, in cerebrospinal fluid (CSF) and blood are considered biomarkers for axonal damage and neurodegeneration in several neurological disorders, such as Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis (ALS), and multiple sclerosis (MS).

The sciatic nerve is the largest and longest nerve in the human body, running from the lower back through the buttocks and down the legs to the feet. It is formed by the union of the ventral rami (branches) of the L4 to S3 spinal nerves. The sciatic nerve provides motor and sensory innervation to various muscles and skin areas in the lower limbs, including the hamstrings, calf muscles, and the sole of the foot. Sciatic nerve disorders or injuries can result in symptoms such as pain, numbness, tingling, or weakness in the lower back, hips, legs, and feet, known as sciatica.

Protein transport, in the context of cellular biology, refers to the process by which proteins are actively moved from one location to another within or between cells. This is a crucial mechanism for maintaining proper cell function and regulation.

Intracellular protein transport involves the movement of proteins within a single cell. Proteins can be transported across membranes (such as the nuclear envelope, endoplasmic reticulum, Golgi apparatus, or plasma membrane) via specialized transport systems like vesicles and transport channels.

Intercellular protein transport refers to the movement of proteins from one cell to another, often facilitated by exocytosis (release of proteins in vesicles) and endocytosis (uptake of extracellular substances via membrane-bound vesicles). This is essential for communication between cells, immune response, and other physiological processes.

It's important to note that any disruption in protein transport can lead to various diseases, including neurological disorders, cancer, and metabolic conditions.

The optic nerve, also known as the second cranial nerve, is the nerve that transmits visual information from the retina to the brain. It is composed of approximately one million nerve fibers that carry signals related to vision, such as light intensity and color, from the eye's photoreceptor cells (rods and cones) to the visual cortex in the brain. The optic nerve is responsible for carrying this visual information so that it can be processed and interpreted by the brain, allowing us to see and perceive our surroundings. Damage to the optic nerve can result in vision loss or impairment.

Dyneins are a type of motor protein that play an essential role in the movement of cellular components and structures within eukaryotic cells. They are responsible for generating force and motion along microtubules, which are critical components of the cell's cytoskeleton. Dyneins are involved in various cellular processes, including intracellular transport, organelle positioning, and cell division.

There are several types of dyneins, but the two main categories are cytoplasmic dyneins and axonemal dyneins. Cytoplasmic dyneins are responsible for moving various cargoes, such as vesicles, organelles, and mRNA complexes, toward the minus-end of microtubules, which is usually located near the cell center. Axonemal dyneins, on the other hand, are found in cilia and flagella and are responsible for their movement by sliding adjacent microtubules past each other.

Dyneins consist of multiple subunits, including heavy chains, intermediate chains, light-intermediate chains, and light chains. The heavy chains contain the motor domain that binds to microtubules and hydrolyzes ATP to generate force. Dysfunction in dynein proteins has been linked to various human diseases, such as neurodevelopmental disorders, ciliopathies, and cancer.

Kymography is a medical imaging technique used to visualize and analyze the movement or motion of structures, such as muscles, blood vessels, or intestines, over time. It involves capturing a series of images at high temporal resolution and then displaying them in a way that emphasizes changes in intensity along a single line or region of interest.

In kymography, a moving stripe or band is created on the image display, representing the movement of the structure being studied. The resulting image shows the velocity, direction, and patterns of motion of the structure, which can be useful for diagnostic purposes or for research in physiology and biomechanics.

Kymography is often used in conjunction with other imaging techniques, such as ultrasound or fluoroscopy, to provide more detailed information about the function and behavior of different tissues and organs.

Neurons, also known as nerve cells or neurocytes, are specialized cells that constitute the basic unit of the nervous system. They are responsible for receiving, processing, and transmitting information and signals within the body. Neurons have three main parts: the dendrites, the cell body (soma), and the axon. The dendrites receive signals from other neurons or sensory receptors, while the axon transmits these signals to other neurons, muscles, or glands. The junction between two neurons is called a synapse, where neurotransmitters are released to transmit the signal across the gap (synaptic cleft) to the next neuron. Neurons vary in size, shape, and structure depending on their function and location within the nervous system.

Microtubules are hollow, cylindrical structures composed of tubulin proteins in the cytoskeleton of eukaryotic cells. They play crucial roles in various cellular processes such as maintaining cell shape, intracellular transport, and cell division (mitosis and meiosis). Microtubules are dynamic, undergoing continuous assembly and disassembly, which allows them to rapidly reorganize in response to cellular needs. They also form part of important cellular structures like centrioles, basal bodies, and cilia/flagella.

Ion transport refers to the active or passive movement of ions, such as sodium (Na+), potassium (K+), chloride (Cl-), and calcium (Ca2+) ions, across cell membranes. This process is essential for various physiological functions, including nerve impulse transmission, muscle contraction, and maintenance of resting membrane potential.

Ion transport can occur through several mechanisms, including:

1. Diffusion: the passive movement of ions down their concentration gradient, from an area of high concentration to an area of low concentration.
2. Facilitated diffusion: the passive movement of ions through specialized channels or transporters in the cell membrane.
3. Active transport: the energy-dependent movement of ions against their concentration gradient, requiring the use of ATP. This process is often mediated by ion pumps, such as the sodium-potassium pump (Na+/K+-ATPase).
4. Co-transport or symport: the coupled transport of two or more different ions or molecules in the same direction, often driven by an electrochemical gradient.
5. Counter-transport or antiport: the coupled transport of two or more different ions or molecules in opposite directions, also often driven by an electrochemical gradient.

Abnormalities in ion transport can lead to various medical conditions, such as cystic fibrosis (which involves defective chloride channel function), hypertension (which may be related to altered sodium transport), and certain forms of heart disease (which can result from abnormal calcium handling).

Membrane transport proteins are specialized biological molecules, specifically integral membrane proteins, that facilitate the movement of various substances across the lipid bilayer of cell membranes. They are responsible for the selective and regulated transport of ions, sugars, amino acids, nucleotides, and other molecules into and out of cells, as well as within different cellular compartments. These proteins can be categorized into two main types: channels and carriers (or pumps). Channels provide a passive transport mechanism, allowing ions or small molecules to move down their electrochemical gradient, while carriers actively transport substances against their concentration gradient, requiring energy usually in the form of ATP. Membrane transport proteins play a crucial role in maintaining cell homeostasis, signaling processes, and many other physiological functions.

Transport vesicles are membrane-bound sacs or containers within cells that are responsible for the intracellular transport of proteins, lipids, and other cargo. These vesicles form when a portion of a donor membrane buds off, enclosing the cargo inside. There are different types of transport vesicles, including:

1. Endoplasmic reticulum (ER) vesicles: These vesicles form from the ER and transport proteins to the Golgi apparatus for further processing.
2. Golgi-derived vesicles: After proteins have been processed in the Golgi, they are packaged into transport vesicles that can deliver them to their final destinations within the cell or to the plasma membrane for secretion.
3. Endocytic vesicles: These vesicles form when a portion of the plasma membrane invaginates and pinches off, engulfing extracellular material or fluid. Examples include clathrin-coated vesicles and caveolae.
4. Lysosomal vesicles: These vesicles transport materials to lysosomes for degradation.
5. Secretory vesicles: These vesicles store proteins and other molecules that will be secreted from the cell. When stimulated, these vesicles fuse with the plasma membrane, releasing their contents to the extracellular space.

Nerve tissue proteins are specialized proteins found in the nervous system that provide structural and functional support to nerve cells, also known as neurons. These proteins include:

1. Neurofilaments: These are type IV intermediate filaments that provide structural support to neurons and help maintain their shape and size. They are composed of three subunits - NFL (light), NFM (medium), and NFH (heavy).

2. Neuronal Cytoskeletal Proteins: These include tubulins, actins, and spectrins that provide structural support to the neuronal cytoskeleton and help maintain its integrity.

3. Neurotransmitter Receptors: These are specialized proteins located on the postsynaptic membrane of neurons that bind neurotransmitters released by presynaptic neurons, triggering a response in the target cell.

4. Ion Channels: These are transmembrane proteins that regulate the flow of ions across the neuronal membrane and play a crucial role in generating and transmitting electrical signals in neurons.

5. Signaling Proteins: These include enzymes, receptors, and adaptor proteins that mediate intracellular signaling pathways involved in neuronal development, differentiation, survival, and death.

6. Adhesion Proteins: These are cell surface proteins that mediate cell-cell and cell-matrix interactions, playing a crucial role in the formation and maintenance of neural circuits.

7. Extracellular Matrix Proteins: These include proteoglycans, laminins, and collagens that provide structural support to nerve tissue and regulate neuronal migration, differentiation, and survival.

Organelles are specialized structures within cells that perform specific functions essential for the cell's survival and proper functioning. They can be thought of as the "organs" of the cell, and they are typically membrane-bound to separate them from the rest of the cellular cytoplasm. Examples of organelles include the nucleus (which contains the genetic material), mitochondria (which generate energy for the cell), ribosomes (which synthesize proteins), endoplasmic reticulum (which is involved in protein and lipid synthesis), Golgi apparatus (which modifies, sorts, and packages proteins and lipids for transport), lysosomes (which break down waste materials and cellular debris), peroxisomes (which detoxify harmful substances and produce certain organic compounds), and vacuoles (which store nutrients and waste products). The specific organelles present in a cell can vary depending on the type of cell and its function.

Decapodiformes is a taxonomic order of marine cephalopods, which includes squids, octopuses, and cuttlefish. The name "Decapodiformes" comes from the Greek words "deca," meaning ten, and "podos," meaning foot, referring to the fact that these animals have ten limbs.

However, it is worth noting that within Decapodiformes, octopuses are an exception as they only have eight arms. The other members of this order, such as squids and cuttlefish, have ten appendages, which are used for locomotion, feeding, and sensory perception.

Decapodiformes species are known for their complex behaviors, sophisticated communication systems, and remarkable adaptations that enable them to thrive in a variety of marine habitats. They play important ecological roles as both predators and prey in the ocean food chain.

Molecular motor proteins are a type of protein that convert chemical energy into mechanical work at the molecular level. They play a crucial role in various cellular processes, such as cell division, muscle contraction, and intracellular transport. There are several types of molecular motor proteins, including myosin, kinesin, and dynein.

Myosin is responsible for muscle contraction and movement along actin filaments in the cytoplasm. Kinesin and dynein are involved in intracellular transport along microtubules, moving cargo such as vesicles, organelles, and mRNA to various destinations within the cell.

These motor proteins move in a stepwise fashion, with each step driven by the hydrolysis of adenosine triphosphate (ATP) into adenosine diphosphate (ADP) and inorganic phosphate (Pi). The directionality and speed of movement are determined by the structure and regulation of the motor proteins, as well as the properties of the tracks along which they move.

Medical Definition:
Microtubule-associated proteins (MAPs) are a diverse group of proteins that bind to microtubules, which are key components of the cytoskeleton in eukaryotic cells. MAPs play crucial roles in regulating microtubule dynamics and stability, as well as in mediating interactions between microtubules and other cellular structures. They can be classified into several categories based on their functions, including:

1. Microtubule stabilizers: These MAPs promote the assembly of microtubules and protect them from disassembly by enhancing their stability. Examples include tau proteins and MAP2.
2. Microtubule dynamics regulators: These MAPs modulate the rate of microtubule polymerization and depolymerization, allowing for dynamic reorganization of the cytoskeleton during cell division and other processes. Examples include stathmin and XMAP215.
3. Microtubule motor proteins: These MAPs use energy from ATP hydrolysis to move along microtubules, transporting various cargoes within the cell. Examples include kinesin and dynein.
4. Adapter proteins: These MAPs facilitate interactions between microtubules and other cellular structures, such as membranes, organelles, or signaling molecules. Examples include MAP4 and CLASPs.

Dysregulation of MAPs has been implicated in several diseases, including neurodegenerative disorders like Alzheimer's disease (where tau proteins form abnormal aggregates called neurofibrillary tangles) and cancer (where altered microtubule dynamics can contribute to uncontrolled cell division).

'Aotus trivirgatus' is a species of New World monkey, also known as the owl monkey or the white-bellied night monkey. It is native to South America, particularly in countries like Colombia, Ecuador, Peru, and Brazil. This nocturnal primate is notable for being one of the few monogamous species of monkeys, and it has a diet that mainly consists of fruits, flowers, and insects.

The medical community may study 'Aotus trivirgatus' due to its use as a model organism in biomedical research. Its genetic similarity to humans makes it a valuable subject for studies on various diseases and biological processes, including infectious diseases, reproductive biology, and aging. However, the use of this species in research has been controversial due to ethical concerns regarding animal welfare.

Tau proteins are a type of microtubule-associated protein (MAP) found primarily in neurons of the central nervous system. They play a crucial role in maintaining the stability and structure of microtubules, which are essential components of the cell's cytoskeleton. Tau proteins bind to and stabilize microtubules, helping to regulate their assembly and disassembly.

In Alzheimer's disease and other neurodegenerative disorders known as tauopathies, tau proteins can become abnormally hyperphosphorylated, leading to the formation of insoluble aggregates called neurofibrillary tangles (NFTs) within neurons. These aggregates disrupt the normal function of microtubules and contribute to the degeneration and death of nerve cells, ultimately leading to cognitive decline and other symptoms associated with these disorders.

Colchicine is a medication that is primarily used to treat gout, a type of arthritis characterized by sudden and severe attacks of pain, swelling, redness, and tenderness in the joints. It works by reducing inflammation and preventing the formation of uric acid crystals that cause gout symptoms.

Colchicine is also used to treat familial Mediterranean fever (FMF), a genetic disorder that causes recurrent fevers and inflammation in the abdomen, chest, and joints. It can help prevent FMF attacks and reduce their severity.

The medication comes in the form of tablets or capsules that are taken by mouth. Common side effects of colchicine include diarrhea, nausea, vomiting, and abdominal pain. In rare cases, it can cause more serious side effects such as muscle weakness, nerve damage, and bone marrow suppression.

It is important to follow the dosage instructions carefully when taking colchicine, as taking too much of the medication can be toxic. People with certain health conditions, such as liver or kidney disease, may need to take a lower dose or avoid using colchicine altogether.

I'm sorry for any confusion, but "nerve expansion" is not a widely recognized or established medical term with a specific definition. Nerves are the part of the nervous system that transmits signals between different parts of the body, and they are not something that typically "expands." If you have a specific context or situation in which this term was used, I would be happy to help provide more information if I can!

Spinal ganglia, also known as dorsal root ganglia, are clusters of nerve cell bodies located in the peripheral nervous system. They are situated along the length of the spinal cord and are responsible for transmitting sensory information from the body to the brain. Each spinal ganglion contains numerous neurons, or nerve cells, with long processes called axons that extend into the periphery and innervate various tissues and organs. The cell bodies within the spinal ganglia receive sensory input from these axons and transmit this information to the central nervous system via the dorsal roots of the spinal nerves. This allows the brain to interpret and respond to a wide range of sensory stimuli, including touch, temperature, pain, and proprioception (the sense of the position and movement of one's body).

In the context of medicine and pharmacology, "kinetics" refers to the study of how a drug moves throughout the body, including its absorption, distribution, metabolism, and excretion (often abbreviated as ADME). This field is called "pharmacokinetics."

1. Absorption: This is the process of a drug moving from its site of administration into the bloodstream. Factors such as the route of administration (e.g., oral, intravenous, etc.), formulation, and individual physiological differences can affect absorption.

2. Distribution: Once a drug is in the bloodstream, it gets distributed throughout the body to various tissues and organs. This process is influenced by factors like blood flow, protein binding, and lipid solubility of the drug.

3. Metabolism: Drugs are often chemically modified in the body, typically in the liver, through processes known as metabolism. These changes can lead to the formation of active or inactive metabolites, which may then be further distributed, excreted, or undergo additional metabolic transformations.

4. Excretion: This is the process by which drugs and their metabolites are eliminated from the body, primarily through the kidneys (urine) and the liver (bile).

Understanding the kinetics of a drug is crucial for determining its optimal dosing regimen, potential interactions with other medications or foods, and any necessary adjustments for special populations like pediatric or geriatric patients, or those with impaired renal or hepatic function.

Tubulin is a type of protein that forms microtubules, which are hollow cylindrical structures involved in the cell's cytoskeleton. These structures play important roles in various cellular processes, including maintaining cell shape, cell division, and intracellular transport. There are two main types of tubulin proteins: alpha-tubulin and beta-tubulin. They polymerize to form heterodimers, which then assemble into microtubules. The assembly and disassembly of microtubules are dynamic processes that are regulated by various factors, including GTP hydrolysis, motor proteins, and microtubule-associated proteins (MAPs). Tubulin is an essential component of the eukaryotic cell and has been a target for anti-cancer drugs such as taxanes and vinca alkaloids.

"Cells, cultured" is a medical term that refers to cells that have been removed from an organism and grown in controlled laboratory conditions outside of the body. This process is called cell culture and it allows scientists to study cells in a more controlled and accessible environment than they would have inside the body. Cultured cells can be derived from a variety of sources, including tissues, organs, or fluids from humans, animals, or cell lines that have been previously established in the laboratory.

Cell culture involves several steps, including isolation of the cells from the tissue, purification and characterization of the cells, and maintenance of the cells in appropriate growth conditions. The cells are typically grown in specialized media that contain nutrients, growth factors, and other components necessary for their survival and proliferation. Cultured cells can be used for a variety of purposes, including basic research, drug development and testing, and production of biological products such as vaccines and gene therapies.

It is important to note that cultured cells may behave differently than they do in the body, and results obtained from cell culture studies may not always translate directly to human physiology or disease. Therefore, it is essential to validate findings from cell culture experiments using additional models and ultimately in clinical trials involving human subjects.

Neurofibrils are thin, thread-like structures found within the cytoplasm of nerve cells (neurons). They are primarily composed of various proteins and are involved in maintaining the structure and function of neurons. Neurofibrils include two types: neurofilaments and microtubule-associated protein tau (TAU) proteins.

Neurofilaments are intermediate filaments that provide structural support to neurons, while TAU proteins are involved in microtubule assembly, stability, and intracellular transport. Abnormal accumulation and aggregation of these proteins can lead to neurodegenerative disorders, such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis (ALS).

Carrier proteins, also known as transport proteins, are a type of protein that facilitates the movement of molecules across cell membranes. They are responsible for the selective and active transport of ions, sugars, amino acids, and other molecules from one side of the membrane to the other, against their concentration gradient. This process requires energy, usually in the form of ATP (adenosine triphosphate).

Carrier proteins have a specific binding site for the molecule they transport, and undergo conformational changes upon binding, which allows them to move the molecule across the membrane. Once the molecule has been transported, the carrier protein returns to its original conformation, ready to bind and transport another molecule.

Carrier proteins play a crucial role in maintaining the balance of ions and other molecules inside and outside of cells, and are essential for many physiological processes, including nerve impulse transmission, muscle contraction, and nutrient uptake.

Monosaccharide transport proteins are a type of membrane transport protein that facilitate the passive or active transport of monosaccharides, such as glucose, fructose, and galactose, across cell membranes. These proteins play a crucial role in the absorption, distribution, and metabolism of carbohydrates in the body.

There are two main types of monosaccharide transport proteins: facilitated diffusion transporters and active transporters. Facilitated diffusion transporters, also known as glucose transporters (GLUTs), passively transport monosaccharides down their concentration gradient without the need for energy. In contrast, active transporters, such as the sodium-glucose cotransporter (SGLT), use energy in the form of ATP to actively transport monosaccharides against their concentration gradient.

Monosaccharide transport proteins are found in various tissues throughout the body, including the intestines, kidneys, liver, and brain. They play a critical role in maintaining glucose homeostasis by regulating the uptake and release of glucose into and out of cells. Dysfunction of these transporters has been implicated in several diseases, such as diabetes, cancer, and neurological disorders.

Nerve degeneration, also known as neurodegeneration, is the progressive loss of structure and function of neurons, which can lead to cognitive decline, motor impairment, and various other symptoms. This process occurs due to a variety of factors, including genetics, environmental influences, and aging. It is a key feature in several neurological disorders such as Alzheimer's disease, Parkinson's disease, Huntington's disease, and multiple sclerosis. The degeneration can affect any part of the nervous system, leading to different symptoms depending on the location and extent of the damage.

Mitochondria are specialized structures located inside cells that convert the energy from food into ATP (adenosine triphosphate), which is the primary form of energy used by cells. They are often referred to as the "powerhouses" of the cell because they generate most of the cell's supply of chemical energy. Mitochondria are also involved in various other cellular processes, such as signaling, differentiation, and apoptosis (programmed cell death).

Mitochondria have their own DNA, known as mitochondrial DNA (mtDNA), which is inherited maternally. This means that mtDNA is passed down from the mother to her offspring through the egg cells. Mitochondrial dysfunction has been linked to a variety of diseases and conditions, including neurodegenerative disorders, diabetes, and aging.

A mutation is a permanent change in the DNA sequence of an organism's genome. Mutations can occur spontaneously or be caused by environmental factors such as exposure to radiation, chemicals, or viruses. They may have various effects on the organism, ranging from benign to harmful, depending on where they occur and whether they alter the function of essential proteins. In some cases, mutations can increase an individual's susceptibility to certain diseases or disorders, while in others, they may confer a survival advantage. Mutations are the driving force behind evolution, as they introduce new genetic variability into populations, which can then be acted upon by natural selection.

Motor neurons are specialized nerve cells in the brain and spinal cord that play a crucial role in controlling voluntary muscle movements. They transmit electrical signals from the brain to the muscles, enabling us to perform actions such as walking, talking, and swallowing. There are two types of motor neurons: upper motor neurons, which originate in the brain's motor cortex and travel down to the brainstem and spinal cord; and lower motor neurons, which extend from the brainstem and spinal cord to the muscles. Damage or degeneration of these motor neurons can lead to various neurological disorders, such as amyotrophic lateral sclerosis (ALS) and spinal muscular atrophy (SMA).

The Amyloid Beta-Protein Precursor (AβPP) is a type of transmembrane protein that is widely expressed in various tissues and organs, including the brain. It plays a crucial role in normal physiological processes, such as neuronal development, synaptic plasticity, and repair.

AβPP undergoes proteolytic processing by enzymes called secretases, resulting in the production of several protein fragments, including the amyloid-beta (Aβ) peptide. Aβ is a small peptide that can aggregate and form insoluble fibrils, which are the main component of amyloid plaques found in the brains of patients with Alzheimer's disease (AD).

The accumulation of Aβ plaques is believed to contribute to the neurodegeneration and cognitive decline observed in AD. Therefore, AβPP and its proteolytic processing have been the focus of extensive research aimed at understanding the pathogenesis of AD and developing potential therapies.

Kinetin is a type of plant growth hormone, specifically a cytokinin. It plays a crucial role in cell division and differentiation, as well as promoting growth and delaying senescence (aging) in plants. Kinetin has also been studied for its potential use in various medical applications, including wound healing, tissue culture, and skin care products. However, it is primarily known for its role in plant biology.

A nerve crush injury is a type of peripheral nerve injury that occurs when there is excessive pressure or compression applied to a nerve, causing it to become damaged or dysfunctional. This can happen due to various reasons such as trauma from accidents, surgical errors, or prolonged pressure on the nerve from tight casts, clothing, or positions.

The compression disrupts the normal functioning of the nerve, leading to symptoms such as numbness, tingling, weakness, or pain in the affected area. In severe cases, a nerve crush injury can cause permanent damage to the nerve, leading to long-term disability or loss of function. Treatment for nerve crush injuries typically involves relieving the pressure on the nerve, providing supportive care, and in some cases, surgical intervention may be necessary to repair the damaged nerve.

Retinal Ganglion Cells (RGCs) are a type of neuron located in the innermost layer of the retina, the light-sensitive tissue at the back of the eye. These cells receive visual information from photoreceptors (rods and cones) via intermediate cells called bipolar cells. RGCs then send this visual information through their long axons to form the optic nerve, which transmits the signals to the brain for processing and interpretation as vision.

There are several types of RGCs, each with distinct morphological and functional characteristics. Some RGCs are specialized in detecting specific features of the visual scene, such as motion, contrast, color, or brightness. The diversity of RGCs allows for a rich and complex representation of the visual world in the brain.

Damage to RGCs can lead to various visual impairments, including loss of vision, reduced visual acuity, and altered visual fields. Conditions associated with RGC damage or degeneration include glaucoma, optic neuritis, ischemic optic neuropathy, and some inherited retinal diseases.

The Electron Transport Chain (ETC) is a series of complexes in the inner mitochondrial membrane that are involved in the process of cellular respiration. It is the final pathway for electrons derived from the oxidation of nutrients such as glucose, fatty acids, and amino acids to be transferred to molecular oxygen. This transfer of electrons drives the generation of a proton gradient across the inner mitochondrial membrane, which is then used by ATP synthase to produce ATP, the main energy currency of the cell.

The electron transport chain consists of four complexes (I-IV) and two mobile electron carriers (ubiquinone and cytochrome c). Electrons from NADH and FADH2 are transferred to Complex I and Complex II respectively, which then pass them along to ubiquinone. Ubiquinone then transfers the electrons to Complex III, which passes them on to cytochrome c. Finally, cytochrome c transfers the electrons to Complex IV, where they combine with oxygen and protons to form water.

The transfer of electrons through the ETC is accompanied by the pumping of protons from the mitochondrial matrix to the intermembrane space, creating a proton gradient. The flow of protons back across the inner membrane through ATP synthase drives the synthesis of ATP from ADP and inorganic phosphate.

Overall, the electron transport chain is a crucial process for generating energy in the form of ATP in the cell, and it plays a key role in many metabolic pathways.

Intermediate filaments (IFs) are a type of cytoskeletal filament found in the cytoplasm of eukaryotic cells, including animal cells. They are called "intermediate" because they are smaller in diameter than microfilaments and larger than microtubules, two other types of cytoskeletal structures.

Intermediate filaments are composed of fibrous proteins that form long, unbranched, and flexible filaments. These filaments provide structural support to the cell and help maintain its shape. They also play a role in cell-to-cell adhesion, intracellular transport, and protection against mechanical stress.

Intermediate filaments are classified into six types based on their protein composition: Type I (acidic keratins), Type II (neutral/basic keratins), Type III (vimentin, desmin, peripherin), Type IV (neurofilaments), Type V (lamins), and Type VI (nestin). Each type of intermediate filament has a specific function and is expressed in different cell types. For example, Type I and II keratins are found in epithelial cells, while vimentin is expressed in mesenchymal cells.

Overall, intermediate filaments play an essential role in maintaining the structural integrity of cells and tissues, and their dysfunction has been implicated in various human diseases, including cancer, neurodegenerative disorders, and genetic disorders.

Stilbamidines are a class of chemical compounds that are primarily used as veterinary medicines, specifically as parasiticides for the treatment and prevention of ectoparasites such as ticks and lice in livestock animals. Stilbamidines belong to the family of chemicals known as formamidines, which are known to have insecticidal and acaricidal properties.

The most common stilbamidine compound is chlorphentermine, which has been used as an appetite suppressant in human medicine. However, its use as a weight loss drug was discontinued due to its addictive properties and potential for serious side effects.

It's important to note that Stilbamidines are not approved for use in humans and should only be used under the supervision of a veterinarian for the intended purpose of treating and preventing ectoparasites in animals.

Neurites are extensions of a neuron (a type of cell in the nervous system) that can be either an axon or a dendrite. An axon is a thin, cable-like extension that carries signals away from the cell body, while a dendrite is a branching extension that receives signals from other neurons. Neurites play a crucial role in the communication between neurons and the formation of neural networks. They are involved in the transmission of electrical and chemical signals, as well as in the growth and development of the nervous system.

A cell membrane, also known as the plasma membrane, is a thin semi-permeable phospholipid bilayer that surrounds all cells in animals, plants, and microorganisms. It functions as a barrier to control the movement of substances in and out of the cell, allowing necessary molecules such as nutrients, oxygen, and signaling molecules to enter while keeping out harmful substances and waste products. The cell membrane is composed mainly of phospholipids, which have hydrophilic (water-loving) heads and hydrophobic (water-fearing) tails. This unique structure allows the membrane to be flexible and fluid, yet selectively permeable. Additionally, various proteins are embedded in the membrane that serve as channels, pumps, receptors, and enzymes, contributing to the cell's overall functionality and communication with its environment.

Motor Neuron Disease (MND) is a progressive neurodegenerative disorder that affects the motor neurons, which are nerve cells in the brain and spinal cord responsible for controlling voluntary muscles involved in movement, speaking, breathing, and swallowing. As the motor neurons degenerate and die, they stop sending signals to the muscles, causing them to weaken, waste away (atrophy), and eventually lead to paralysis.

There are several types of MND, including:

1. Amyotrophic Lateral Sclerosis (ALS): Also known as Lou Gehrig's disease, this is the most common form of MND. It affects both upper and lower motor neurons, causing muscle weakness, stiffness, twitching, and atrophy throughout the body.
2. Progressive Bulbar Palsy (PBP): This type primarily affects the bulbar muscles in the brainstem, which control speech, swallowing, and chewing. Patients with PBP experience difficulties with speaking, slurred speech, and problems swallowing and may also have weak facial muscles and limb weakness.
3. Primary Lateral Sclerosis (PLS): This form of MND affects only the upper motor neurons, causing muscle stiffness, spasticity, and weakness, primarily in the legs. PLS progresses more slowly than ALS, and patients usually maintain their ability to speak and swallow for a longer period.
4. Progressive Muscular Atrophy (PMA): This type of MND affects only the lower motor neurons, causing muscle wasting, weakness, and fasciculations (muscle twitches). PMA progresses more slowly than ALS but can still be severely disabling over time.
5. Spinal Muscular Atrophy (SMA): This is a genetic form of MND that typically presents in infancy or childhood, although adult-onset forms exist. SMA affects the lower motor neurons in the spinal cord, causing muscle weakness and atrophy, primarily in the legs and trunk.

The exact cause of Motor Neuron Disease is not fully understood, but it is believed to involve a combination of genetic, environmental, and lifestyle factors. There is currently no cure for MND, and treatment focuses on managing symptoms, maintaining quality of life, and slowing disease progression through various therapies and medications.

Sodium is an essential mineral and electrolyte that is necessary for human health. In a medical context, sodium is often discussed in terms of its concentration in the blood, as measured by serum sodium levels. The normal range for serum sodium is typically between 135 and 145 milliequivalents per liter (mEq/L).

Sodium plays a number of important roles in the body, including:

* Regulating fluid balance: Sodium helps to regulate the amount of water in and around your cells, which is important for maintaining normal blood pressure and preventing dehydration.
* Facilitating nerve impulse transmission: Sodium is involved in the generation and transmission of electrical signals in the nervous system, which is necessary for proper muscle function and coordination.
* Assisting with muscle contraction: Sodium helps to regulate muscle contractions by interacting with other minerals such as calcium and potassium.

Low sodium levels (hyponatremia) can cause symptoms such as confusion, seizures, and coma, while high sodium levels (hypernatremia) can lead to symptoms such as weakness, muscle cramps, and seizures. Both conditions require medical treatment to correct.

Sprague-Dawley rats are a strain of albino laboratory rats that are widely used in scientific research. They were first developed by researchers H.H. Sprague and R.C. Dawley in the early 20th century, and have since become one of the most commonly used rat strains in biomedical research due to their relatively large size, ease of handling, and consistent genetic background.

Sprague-Dawley rats are outbred, which means that they are genetically diverse and do not suffer from the same limitations as inbred strains, which can have reduced fertility and increased susceptibility to certain diseases. They are also characterized by their docile nature and low levels of aggression, making them easier to handle and study than some other rat strains.

These rats are used in a wide variety of research areas, including toxicology, pharmacology, nutrition, cancer, and behavioral studies. Because they are genetically diverse, Sprague-Dawley rats can be used to model a range of human diseases and conditions, making them an important tool in the development of new drugs and therapies.

In the field of medicine, "time factors" refer to the duration of symptoms or time elapsed since the onset of a medical condition, which can have significant implications for diagnosis and treatment. Understanding time factors is crucial in determining the progression of a disease, evaluating the effectiveness of treatments, and making critical decisions regarding patient care.

For example, in stroke management, "time is brain," meaning that rapid intervention within a specific time frame (usually within 4.5 hours) is essential to administering tissue plasminogen activator (tPA), a clot-busting drug that can minimize brain damage and improve patient outcomes. Similarly, in trauma care, the "golden hour" concept emphasizes the importance of providing definitive care within the first 60 minutes after injury to increase survival rates and reduce morbidity.

Time factors also play a role in monitoring the progression of chronic conditions like diabetes or heart disease, where regular follow-ups and assessments help determine appropriate treatment adjustments and prevent complications. In infectious diseases, time factors are crucial for initiating antibiotic therapy and identifying potential outbreaks to control their spread.

Overall, "time factors" encompass the significance of recognizing and acting promptly in various medical scenarios to optimize patient outcomes and provide effective care.

Tauopathies are a group of neurodegenerative disorders that are characterized by the abnormal accumulation and aggregation of the microtubule-associated protein Tau in neurons and glial cells. These misfolded Tau proteins form insoluble inclusions, such as neurofibrillary tangles (NFTs) and neuropil threads, which are associated with the degeneration and loss of neurons in specific regions of the brain.

Tauopathies include several well-known diseases, such as Alzheimer's disease (AD), progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), and frontotemporal dementia with Parkinsonism-17 (FTDP-17). The exact cause of Tauopathies remains unclear, but genetic mutations, environmental factors, or a combination of both may contribute to the development and progression of these disorders.

The accumulation of abnormal Tau aggregates is believed to play a central role in the neurodegenerative process, leading to cognitive decline, motor impairment, and other neurological symptoms associated with Tauopathies. The diagnosis of Tauopathies typically involves clinical evaluation, imaging studies, and sometimes postmortem examination of brain tissue. Currently, there are no effective disease-modifying treatments for Tauopathies, but ongoing research is focused on developing therapies that target Tau aggregation and clearance to slow down or halt the progression of these debilitating disorders.

Diffuse axonal injury (DAI) is a type of traumatic brain injury that occurs when there is extensive damage to the nerve fibers (axons) in the brain. It is often caused by rapid acceleration or deceleration forces, such as those experienced during motor vehicle accidents or falls. In DAI, the axons are stretched and damaged, leading to disruption of communication between different parts of the brain. This can result in a wide range of symptoms, including cognitive impairment, loss of consciousness, and motor dysfunction. DAI is often difficult to diagnose and can have long-term consequences, making it an important area of study in traumatic brain injury research.

Biological models, also known as physiological models or organismal models, are simplified representations of biological systems, processes, or mechanisms that are used to understand and explain the underlying principles and relationships. These models can be theoretical (conceptual or mathematical) or physical (such as anatomical models, cell cultures, or animal models). They are widely used in biomedical research to study various phenomena, including disease pathophysiology, drug action, and therapeutic interventions.

Examples of biological models include:

1. Mathematical models: These use mathematical equations and formulas to describe complex biological systems or processes, such as population dynamics, metabolic pathways, or gene regulation networks. They can help predict the behavior of these systems under different conditions and test hypotheses about their underlying mechanisms.
2. Cell cultures: These are collections of cells grown in a controlled environment, typically in a laboratory dish or flask. They can be used to study cellular processes, such as signal transduction, gene expression, or metabolism, and to test the effects of drugs or other treatments on these processes.
3. Animal models: These are living organisms, usually vertebrates like mice, rats, or non-human primates, that are used to study various aspects of human biology and disease. They can provide valuable insights into the pathophysiology of diseases, the mechanisms of drug action, and the safety and efficacy of new therapies.
4. Anatomical models: These are physical representations of biological structures or systems, such as plastic models of organs or tissues, that can be used for educational purposes or to plan surgical procedures. They can also serve as a basis for developing more sophisticated models, such as computer simulations or 3D-printed replicas.

Overall, biological models play a crucial role in advancing our understanding of biology and medicine, helping to identify new targets for therapeutic intervention, develop novel drugs and treatments, and improve human health.

Microtubule proteins are a class of structural proteins that make up the microtubules, which are key components of the cytoskeleton in eukaryotic cells. The main microtubule protein is tubulin, which exists in two forms: alpha-tubulin and beta-tubulin. These tubulins polymerize to form heterodimers, which then assemble into protofilaments, which in turn aggregate to form hollow microtubules. Microtubules are dynamic structures that undergo continuous assembly and disassembly, and they play crucial roles in various cellular processes, including intracellular transport, cell division, and maintenance of cell shape. Other microtubule-associated proteins (MAPs) also bind to microtubules and regulate their stability, dynamics, and interactions with other cellular structures.

Green Fluorescent Protein (GFP) is not a medical term per se, but a scientific term used in the field of molecular biology. GFP is a protein that exhibits bright green fluorescence when exposed to light, particularly blue or ultraviolet light. It was originally discovered in the jellyfish Aequorea victoria.

In medical and biological research, scientists often use recombinant DNA technology to introduce the gene for GFP into other organisms, including bacteria, plants, and animals, including humans. This allows them to track the expression and localization of specific genes or proteins of interest in living cells, tissues, or even whole organisms.

The ability to visualize specific cellular structures or processes in real-time has proven invaluable for a wide range of research areas, from studying the development and function of organs and organ systems to understanding the mechanisms of diseases and the effects of therapeutic interventions.

The hypogastric plexus is a complex network of nerves located in the lower abdomen, near the aortic bifurcation. It plays a crucial role in the autonomic nervous system, primarily controlling the parasympathetic and sympathetic innervation to the pelvic viscera, including the descending colon, rectum, bladder, and reproductive organs. The hypogastric plexus is formed by the fusion of the superior and inferior hypogastric nerves, which originate from the lumbar and sacral spinal cord levels, respectively. Damage to this plexus can lead to various pelvic autonomic dysfunctions, such as urinary and fecal incontinence or sexual impairment.

Vesicular transport proteins are specialized proteins that play a crucial role in the intracellular trafficking and transportation of various biomolecules, such as proteins and lipids, within eukaryotic cells. These proteins facilitate the formation, movement, and fusion of membrane-bound vesicles, which are small, spherical structures that carry cargo between different cellular compartments or organelles.

There are several types of vesicular transport proteins involved in this process:

1. Coat Proteins (COPs): These proteins form a coat around the vesicle membrane and help shape it into its spherical form during the budding process. They also participate in selecting and sorting cargo for transportation. Two main types of COPs exist: COPI, which is involved in transport between the Golgi apparatus and the endoplasmic reticulum (ER), and COPII, which mediates transport from the ER to the Golgi apparatus.

2. SNARE Proteins: These proteins are responsible for the specific recognition and docking of vesicles with their target membranes. They form complexes that bring the vesicle and target membranes close together, allowing for fusion and the release of cargo into the target organelle. There are two types of SNARE proteins: v-SNAREs (vesicle SNAREs) and t-SNAREs (target SNAREs), which interact to form a stable complex during membrane fusion.

3. Rab GTPases: These proteins act as molecular switches that regulate the recruitment of coat proteins, motor proteins, and SNAREs during vesicle transport. They cycle between an active GTP-bound state and an inactive GDP-bound state, controlling the various stages of vesicular trafficking, such as budding, transport, tethering, and fusion.

4. Tethering Proteins: These proteins help to bridge the gap between vesicles and their target membranes before SNARE-mediated fusion occurs. They play a role in ensuring specificity during vesicle docking and may also contribute to regulating the timing of membrane fusion events.

5. Soluble N-ethylmaleimide-sensitive factor Attachment Protein Receptors (SNAREs): These proteins are involved in intracellular transport, particularly in the trafficking of vesicles between organelles. They consist of a family of coiled-coil domain-containing proteins that form complexes to mediate membrane fusion events.

Overall, these various classes of proteins work together to ensure the specificity and efficiency of vesicular transport in eukaryotic cells. Dysregulation or mutation of these proteins can lead to various diseases, including neurodegenerative disorders and cancer.

Membrane proteins are a type of protein that are embedded in the lipid bilayer of biological membranes, such as the plasma membrane of cells or the inner membrane of mitochondria. These proteins play crucial roles in various cellular processes, including:

1. Cell-cell recognition and signaling
2. Transport of molecules across the membrane (selective permeability)
3. Enzymatic reactions at the membrane surface
4. Energy transduction and conversion
5. Mechanosensation and signal transduction

Membrane proteins can be classified into two main categories: integral membrane proteins, which are permanently associated with the lipid bilayer, and peripheral membrane proteins, which are temporarily or loosely attached to the membrane surface. Integral membrane proteins can further be divided into three subcategories based on their topology:

1. Transmembrane proteins, which span the entire width of the lipid bilayer with one or more alpha-helices or beta-barrels.
2. Lipid-anchored proteins, which are covalently attached to lipids in the membrane via a glycosylphosphatidylinositol (GPI) anchor or other lipid modifications.
3. Monotopic proteins, which are partially embedded in the membrane and have one or more domains exposed to either side of the bilayer.

Membrane proteins are essential for maintaining cellular homeostasis and are targets for various therapeutic interventions, including drug development and gene therapy. However, their structural complexity and hydrophobicity make them challenging to study using traditional biochemical methods, requiring specialized techniques such as X-ray crystallography, nuclear magnetic resonance (NMR) spectroscopy, and single-particle cryo-electron microscopy (cryo-EM).

Amyotrophic Lateral Sclerosis (ALS) is a progressive neurodegenerative disorder that affects nerve cells in the brain and spinal cord responsible for controlling voluntary muscle movements, such as speaking, walking, breathing, and swallowing. The condition is characterized by the degeneration of motor neurons in the brain (upper motor neurons) and spinal cord (lower motor neurons), leading to their death.

The term "amyotrophic" comes from the Greek words "a" meaning no or negative, "myo" referring to muscle, and "trophic" relating to nutrition. When a motor neuron degenerates and can no longer send impulses to the muscle, the muscle becomes weak and eventually atrophies due to lack of use.

The term "lateral sclerosis" refers to the hardening or scarring (sclerosis) of the lateral columns of the spinal cord, which are primarily composed of nerve fibers that carry information from the brain to the muscles.

ALS is often called Lou Gehrig's disease, named after the famous American baseball player who was diagnosed with the condition in 1939. The exact cause of ALS remains unknown, but it is believed to involve a combination of genetic and environmental factors. There is currently no cure for ALS, and treatment primarily focuses on managing symptoms and maintaining quality of life.

The progression of ALS varies from person to person, with some individuals experiencing rapid decline over just a few years, while others may have a more slow-progressing form of the disease that lasts several decades. The majority of people with ALS die from respiratory failure within 3 to 5 years after the onset of symptoms. However, approximately 10% of those affected live for 10 or more years following diagnosis.

"Inbred strains of rats" are genetically identical rodents that have been produced through many generations of brother-sister mating. This results in a high degree of homozygosity, where the genes at any particular locus in the genome are identical in all members of the strain.

Inbred strains of rats are widely used in biomedical research because they provide a consistent and reproducible genetic background for studying various biological phenomena, including the effects of drugs, environmental factors, and genetic mutations on health and disease. Additionally, inbred strains can be used to create genetically modified models of human diseases by introducing specific mutations into their genomes.

Some commonly used inbred strains of rats include the Wistar Kyoto (WKY), Sprague-Dawley (SD), and Fischer 344 (F344) rat strains. Each strain has its own unique genetic characteristics, making them suitable for different types of research.

Electron microscopy (EM) is a type of microscopy that uses a beam of electrons to create an image of the sample being examined, resulting in much higher magnification and resolution than light microscopy. There are several types of electron microscopy, including transmission electron microscopy (TEM), scanning electron microscopy (SEM), and reflection electron microscopy (REM).

In TEM, a beam of electrons is transmitted through a thin slice of the sample, and the electrons that pass through the sample are focused to form an image. This technique can provide detailed information about the internal structure of cells, viruses, and other biological specimens, as well as the composition and structure of materials at the atomic level.

In SEM, a beam of electrons is scanned across the surface of the sample, and the electrons that are scattered back from the surface are detected to create an image. This technique can provide information about the topography and composition of surfaces, as well as the structure of materials at the microscopic level.

REM is a variation of SEM in which the beam of electrons is reflected off the surface of the sample, rather than scattered back from it. This technique can provide information about the surface chemistry and composition of materials.

Electron microscopy has a wide range of applications in biology, medicine, and materials science, including the study of cellular structure and function, disease diagnosis, and the development of new materials and technologies.

Molecular sequence data refers to the specific arrangement of molecules, most commonly nucleotides in DNA or RNA, or amino acids in proteins, that make up a biological macromolecule. This data is generated through laboratory techniques such as sequencing, and provides information about the exact order of the constituent molecules. This data is crucial in various fields of biology, including genetics, evolution, and molecular biology, allowing for comparisons between different organisms, identification of genetic variations, and studies of gene function and regulation.

Synaptic vesicles are tiny membrane-enclosed sacs within the presynaptic terminal of a neuron, containing neurotransmitters. They play a crucial role in the process of neurotransmission, which is the transmission of signals between nerve cells. When an action potential reaches the presynaptic terminal, it triggers the fusion of synaptic vesicles with the plasma membrane, releasing neurotransmitters into the synaptic cleft. These neurotransmitters can then bind to receptors on the postsynaptic neuron and trigger a response. After release, synaptic vesicles are recycled through endocytosis, allowing them to be refilled with neurotransmitters and used again in subsequent rounds of neurotransmission.

The cytoskeleton is a complex network of various protein filaments that provides structural support, shape, and stability to the cell. It plays a crucial role in maintaining cellular integrity, intracellular organization, and enabling cell movement. The cytoskeleton is composed of three major types of protein fibers: microfilaments (actin filaments), intermediate filaments, and microtubules. These filaments work together to provide mechanical support, participate in cell division, intracellular transport, and help maintain the cell's architecture. The dynamic nature of the cytoskeleton allows cells to adapt to changing environmental conditions and respond to various stimuli.

Animal disease models are specialized animals, typically rodents such as mice or rats, that have been genetically engineered or exposed to certain conditions to develop symptoms and physiological changes similar to those seen in human diseases. These models are used in medical research to study the pathophysiology of diseases, identify potential therapeutic targets, test drug efficacy and safety, and understand disease mechanisms.

The genetic modifications can include knockout or knock-in mutations, transgenic expression of specific genes, or RNA interference techniques. The animals may also be exposed to environmental factors such as chemicals, radiation, or infectious agents to induce the disease state.

Examples of animal disease models include:

1. Mouse models of cancer: Genetically engineered mice that develop various types of tumors, allowing researchers to study cancer initiation, progression, and metastasis.
2. Alzheimer's disease models: Transgenic mice expressing mutant human genes associated with Alzheimer's disease, which exhibit amyloid plaque formation and cognitive decline.
3. Diabetes models: Obese and diabetic mouse strains like the NOD (non-obese diabetic) or db/db mice, used to study the development of type 1 and type 2 diabetes, respectively.
4. Cardiovascular disease models: Atherosclerosis-prone mice, such as ApoE-deficient or LDLR-deficient mice, that develop plaque buildup in their arteries when fed a high-fat diet.
5. Inflammatory bowel disease models: Mice with genetic mutations affecting intestinal barrier function and immune response, such as IL-10 knockout or SAMP1/YitFc mice, which develop colitis.

Animal disease models are essential tools in preclinical research, but it is important to recognize their limitations. Differences between species can affect the translatability of results from animal studies to human patients. Therefore, researchers must carefully consider the choice of model and interpret findings cautiously when applying them to human diseases.

Cytoplasmic dyneins are a type of motor protein found in the cytoplasm of cells. They are responsible for transporting various cellular cargoes, such as vesicles, organelles, and mRNA, along microtubules toward the minus-end of the microtubule, which is typically located near the cell center or nucleus.

Cytoplasmic dyneins are large protein complexes composed of multiple subunits, including heavy chains, intermediate chains, light intermediate chains, and light chains. The heavy chains contain the motor domain that binds to microtubules and hydrolyzes ATP to generate force for movement. Different isoforms of cytoplasmic dyneins exist, which can transport different cargoes and have distinct functions in cells.

Dysfunction of cytoplasmic dyneins has been implicated in various human diseases, including neurodegenerative disorders such as motor neuron disease and Alzheimer's disease, as well as cancer and developmental abnormalities.

Transgenic mice are genetically modified rodents that have incorporated foreign DNA (exogenous DNA) into their own genome. This is typically done through the use of recombinant DNA technology, where a specific gene or genetic sequence of interest is isolated and then introduced into the mouse embryo. The resulting transgenic mice can then express the protein encoded by the foreign gene, allowing researchers to study its function in a living organism.

The process of creating transgenic mice usually involves microinjecting the exogenous DNA into the pronucleus of a fertilized egg, which is then implanted into a surrogate mother. The offspring that result from this procedure are screened for the presence of the foreign DNA, and those that carry the desired genetic modification are used to establish a transgenic mouse line.

Transgenic mice have been widely used in biomedical research to model human diseases, study gene function, and test new therapies. They provide a valuable tool for understanding complex biological processes and developing new treatments for a variety of medical conditions.

The superior cervical ganglion is a part of the autonomic nervous system, specifically the sympathetic division. It is a collection of nerve cell bodies (ganglion) that are located in the neck region (cervical) and is formed by the fusion of several smaller ganglia.

This ganglion is responsible for providing innervation to various structures in the head and neck, including the eyes, scalp, face muscles, meninges (membranes surrounding the brain and spinal cord), and certain glands such as the salivary and sweat glands. It does this through the postganglionic fibers that branch off from the ganglion and synapse with target organs or tissues.

The superior cervical ganglion is an essential component of the autonomic nervous system, which controls involuntary physiological functions such as heart rate, blood pressure, digestion, and respiration.

Alzheimer's disease is a progressive disorder that causes brain cells to waste away (degenerate) and die. It's the most common cause of dementia — a continuous decline in thinking, behavioral and social skills that disrupts a person's ability to function independently.

The early signs of the disease include forgetting recent events or conversations. As the disease progresses, a person with Alzheimer's disease will develop severe memory impairment and lose the ability to carry out everyday tasks.

Currently, there's no cure for Alzheimer's disease. However, treatments can temporarily slow the worsening of dementia symptoms and improve quality of life.

An amino acid sequence is the specific order of amino acids in a protein or peptide molecule, formed by the linking of the amino group (-NH2) of one amino acid to the carboxyl group (-COOH) of another amino acid through a peptide bond. The sequence is determined by the genetic code and is unique to each type of protein or peptide. It plays a crucial role in determining the three-dimensional structure and function of proteins.

Synapsins are a family of proteins found in the presynaptic terminals of neurons. They play a crucial role in the regulation of neurotransmitter release and synaptic plasticity, which is the ability of synapses to strengthen or weaken over time in response to increases or decreases in their activity.

Synapsins are associated with the cytoskeleton of presynaptic terminals and help to tether vesicles containing neurotransmitters to the cytoskeleton. This allows for the rapid mobilization of vesicles to the active zone of the synapse, where they can be released in response to an action potential.

Synapsins are also involved in the regulation of vesicle pool size and the clustering of calcium channels at the active zone. They have been implicated in various neurological disorders, including epilepsy, fragile X syndrome, and Alzheimer's disease.

Horseradish peroxidase (HRP) is not a medical term, but a type of enzyme that is derived from the horseradish plant. In biological terms, HRP is defined as a heme-containing enzyme isolated from the roots of the horseradish plant (Armoracia rusticana). It is widely used in molecular biology and diagnostic applications due to its ability to catalyze various oxidative reactions, particularly in immunological techniques such as Western blotting and ELISA.

HRP catalyzes the conversion of hydrogen peroxide into water and oxygen, while simultaneously converting a variety of substrates into colored or fluorescent products that can be easily detected. This enzymatic activity makes HRP a valuable tool in detecting and quantifying specific biomolecules, such as proteins and nucleic acids, in biological samples.

"Drosophila" is a genus of small flies, also known as fruit flies. The most common species used in scientific research is "Drosophila melanogaster," which has been a valuable model organism for many areas of biological and medical research, including genetics, developmental biology, neurobiology, and aging.

The use of Drosophila as a model organism has led to numerous important discoveries in genetics and molecular biology, such as the identification of genes that are associated with human diseases like cancer, Parkinson's disease, and obesity. The short reproductive cycle, large number of offspring, and ease of genetic manipulation make Drosophila a powerful tool for studying complex biological processes.

The brain is the central organ of the nervous system, responsible for receiving and processing sensory information, regulating vital functions, and controlling behavior, movement, and cognition. It is divided into several distinct regions, each with specific functions:

1. Cerebrum: The largest part of the brain, responsible for higher cognitive functions such as thinking, learning, memory, language, and perception. It is divided into two hemispheres, each controlling the opposite side of the body.
2. Cerebellum: Located at the back of the brain, it is responsible for coordinating muscle movements, maintaining balance, and fine-tuning motor skills.
3. Brainstem: Connects the cerebrum and cerebellum to the spinal cord, controlling vital functions such as breathing, heart rate, and blood pressure. It also serves as a relay center for sensory information and motor commands between the brain and the rest of the body.
4. Diencephalon: A region that includes the thalamus (a major sensory relay station) and hypothalamus (regulates hormones, temperature, hunger, thirst, and sleep).
5. Limbic system: A group of structures involved in emotional processing, memory formation, and motivation, including the hippocampus, amygdala, and cingulate gyrus.

The brain is composed of billions of interconnected neurons that communicate through electrical and chemical signals. It is protected by the skull and surrounded by three layers of membranes called meninges, as well as cerebrospinal fluid that provides cushioning and nutrients.

Luminescent proteins are a type of protein that emit light through a chemical reaction, rather than by absorbing and re-emitting light like fluorescent proteins. This process is called bioluminescence. The light emitted by luminescent proteins is often used in scientific research as a way to visualize and track biological processes within cells and organisms.

One of the most well-known luminescent proteins is Green Fluorescent Protein (GFP), which was originally isolated from jellyfish. However, GFP is actually a fluorescent protein, not a luminescent one. A true example of a luminescent protein is the enzyme luciferase, which is found in fireflies and other bioluminescent organisms. When luciferase reacts with its substrate, luciferin, it produces light through a process called oxidation.

Luminescent proteins have many applications in research, including as reporters for gene expression, as markers for protein-protein interactions, and as tools for studying the dynamics of cellular processes. They are also used in medical imaging and diagnostics, as well as in the development of new therapies.

Brain-Derived Neurotrophic Factor (BDNF) is a type of protein called a neurotrophin, which is involved in the growth and maintenance of neurons (nerve cells) in the brain. BDNFA is encoded by the BDNF gene and is widely expressed throughout the central nervous system. It plays an essential role in supporting the survival of existing neurons, encouraging the growth and differentiation of new neurons and synapses, and contributing to neuroplasticity - the ability of the brain to change and adapt as a result of experience. Low levels of BDNF have been associated with several neurological disorders, including depression, Alzheimer's disease, and Huntington's disease.

A ganglion is a cluster of neuron cell bodies in the peripheral nervous system. Ganglia are typically associated with nerves and serve as sites for sensory processing, integration, and relay of information between the periphery and the central nervous system (CNS). The two main types of ganglia are sensory ganglia, which contain pseudounipolar neurons that transmit sensory information to the CNS, and autonomic ganglia, which contain multipolar neurons that control involuntary physiological functions.

Examples of sensory ganglia include dorsal root ganglia (DRG), which are associated with spinal nerves, and cranial nerve ganglia, such as the trigeminal ganglion. Autonomic ganglia can be further divided into sympathetic and parasympathetic ganglia, which regulate different aspects of the autonomic nervous system.

It's worth noting that in anatomy, "ganglion" refers to a group of nerve cell bodies, while in clinical contexts, "ganglion" is often used to describe a specific type of cystic structure that forms near joints or tendons, typically in the wrist or foot. These ganglia are not related to the peripheral nervous system's ganglia but rather are fluid-filled sacs that may cause discomfort or pain due to their size or location.

Neurodegenerative diseases are a group of disorders characterized by progressive and persistent loss of neuronal structure and function, often leading to cognitive decline, functional impairment, and ultimately death. These conditions are associated with the accumulation of abnormal protein aggregates, mitochondrial dysfunction, oxidative stress, chronic inflammation, and genetic mutations in the brain. Examples of neurodegenerative diseases include Alzheimer's disease, Parkinson's disease, Huntington's disease, Amyotrophic Lateral Sclerosis (ALS), and Spinal Muscular Atrophy (SMA). The underlying causes and mechanisms of these diseases are not fully understood, and there is currently no cure for most neurodegenerative disorders. Treatment typically focuses on managing symptoms and slowing disease progression.

Endosomes are membrane-bound compartments within eukaryotic cells that play a critical role in intracellular trafficking and sorting of various cargoes, including proteins and lipids. They are formed by the invagination of the plasma membrane during endocytosis, resulting in the internalization of extracellular material and cell surface receptors.

Endosomes can be classified into early endosomes, late endosomes, and recycling endosomes based on their morphology, molecular markers, and functional properties. Early endosomes are the initial sorting stations for internalized cargoes, where they undergo sorting and processing before being directed to their final destinations. Late endosomes are more acidic compartments that mature from early endosomes and are responsible for the transport of cargoes to lysosomes for degradation.

Recycling endosomes, on the other hand, are involved in the recycling of internalized cargoes back to the plasma membrane or to other cellular compartments. Endosomal sorting and trafficking are regulated by a complex network of molecular interactions involving various proteins, lipids, and intracellular signaling pathways.

Defects in endosomal function have been implicated in various human diseases, including neurodegenerative disorders, developmental abnormalities, and cancer. Therefore, understanding the mechanisms underlying endosomal trafficking and sorting is of great importance for developing therapeutic strategies to treat these conditions.

Anion transport proteins are specialized membrane transport proteins that facilitate the movement of negatively charged ions, known as anions, across biological membranes. These proteins play a crucial role in maintaining ionic balance and regulating various physiological processes within the body.

There are several types of anion transport proteins, including:

1. Cl-/HCO3- exchangers (also known as anion exchangers or band 3 proteins): These transporters facilitate the exchange of chloride (Cl-) and bicarbonate (HCO3-) ions across the membrane. They are widely expressed in various tissues, including the red blood cells, gastrointestinal tract, and kidneys, where they help regulate pH, fluid balance, and electrolyte homeostasis.
2. Sulfate permeases: These transporters facilitate the movement of sulfate ions (SO42-) across membranes. They are primarily found in the epithelial cells of the kidneys, intestines, and choroid plexus, where they play a role in sulfur metabolism and absorption.
3. Cl- channels: These proteins form ion channels that allow chloride ions to pass through the membrane. They are involved in various physiological processes, such as neuronal excitability, transepithelial fluid transport, and cell volume regulation.
4. Cation-chloride cotransporters: These transporters move both cations (positively charged ions) and chloride anions together across the membrane. They are involved in regulating neuronal excitability, cell volume, and ionic balance in various tissues.

Dysfunction of anion transport proteins has been implicated in several diseases, such as cystic fibrosis (due to mutations in the CFTR Cl- channel), distal renal tubular acidosis (due to defects in Cl-/HCO3- exchangers), and some forms of epilepsy (due to abnormalities in cation-chloride cotransporters).

Synaptophysin is a protein found in the presynaptic vesicles of neurons, which are involved in the release of neurotransmitters during synaptic transmission. It is often used as a marker for neuronal differentiation and is widely expressed in neuroendocrine cells and tumors. Synaptophysin plays a role in the regulation of neurotransmitter release and has been implicated in various neurological disorders, including Alzheimer's disease and synaptic dysfunction-related conditions.

Cation transport proteins are a type of membrane protein that facilitate the movement of cations (positively charged ions) across biological membranes. These proteins play a crucial role in maintaining ion balance and electrical excitability within cells, as well as in various physiological processes such as nutrient uptake, waste elimination, and signal transduction.

There are several types of cation transport proteins, including:

1. Ion channels: These are specialized protein structures that form a pore or channel through the membrane, allowing ions to pass through rapidly and selectively. They can be either voltage-gated or ligand-gated, meaning they open in response to changes in electrical potential or binding of specific molecules, respectively.

2. Ion pumps: These are active transport proteins that use energy from ATP hydrolysis to move ions against their electrochemical gradient, effectively pumping them from one side of the membrane to the other. Examples include the sodium-potassium pump (Na+/K+-ATPase) and calcium pumps (Ca2+ ATPase).

3. Ion exchangers: These are antiporter proteins that facilitate the exchange of one ion for another across the membrane, maintaining electroneutrality. For example, the sodium-proton exchanger (NHE) moves a proton into the cell in exchange for a sodium ion being moved out.

4. Symporters: These are cotransporter proteins that move two or more ions together in the same direction, often coupled with the transport of a solute molecule. An example is the sodium-glucose cotransporter (SGLT), which facilitates glucose uptake into cells by coupling its movement with that of sodium ions.

Collectively, cation transport proteins help maintain ion homeostasis and contribute to various cellular functions, including electrical signaling, enzyme regulation, and metabolic processes. Dysfunction in these proteins can lead to a range of diseases, such as neurological disorders, cardiovascular disease, and kidney dysfunction.

Growth cones are specialized structures found at the tips of growing neurites (axons and dendrites) during the development and regeneration of the nervous system. They were first described by Santiago Ramón y Cajal in the late 19th century. Growth cones play a crucial role in the process of neurogenesis, guiding the extension and pathfinding of axons to their appropriate targets through a dynamic interplay with environmental cues. These cues include various guidance molecules, such as netrins, semaphorins, ephrins, and slits, which bind to receptors on the growth cone membrane and trigger intracellular signaling cascades that ultimately determine the direction of axonal outgrowth.

Morphologically, a growth cone consists of three main parts: the central domain (or "C-domain"), the peripheral domain (or "P-domain"), and the transition zone connecting them. The C-domain contains microtubules and neurofilaments, which provide structural support and transport materials to the growing neurite. The P-domain is rich in actin filaments and contains numerous membrane protrusions called filopodia and lamellipodia, which explore the environment for guidance cues and facilitate motility.

The dynamic behavior of growth cones allows them to navigate complex environments, make decisions at choice points, and ultimately form precise neural circuits during development. Understanding the mechanisms that regulate growth cone function is essential for developing strategies to promote neural repair and regeneration in various neurological disorders and injuries.

Cytoplasm is the material within a eukaryotic cell (a cell with a true nucleus) that lies between the nuclear membrane and the cell membrane. It is composed of an aqueous solution called cytosol, in which various organelles such as mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles are suspended. Cytoplasm also contains a variety of dissolved nutrients, metabolites, ions, and enzymes that are involved in various cellular processes such as metabolism, signaling, and transport. It is where most of the cell's metabolic activities take place, and it plays a crucial role in maintaining the structure and function of the cell.

The Golgi apparatus, also known as the Golgi complex or simply the Golgi, is a membrane-bound organelle found in the cytoplasm of most eukaryotic cells. It plays a crucial role in the processing, sorting, and packaging of proteins and lipids for transport to their final destinations within the cell or for secretion outside the cell.

The Golgi apparatus consists of a series of flattened, disc-shaped sacs called cisternae, which are stacked together in a parallel arrangement. These stacks are often interconnected by tubular structures called tubules or vesicles. The Golgi apparatus has two main faces: the cis face, which is closest to the endoplasmic reticulum (ER) and receives proteins and lipids directly from the ER; and the trans face, which is responsible for sorting and dispatching these molecules to their final destinations.

The Golgi apparatus performs several essential functions in the cell:

1. Protein processing: After proteins are synthesized in the ER, they are transported to the cis face of the Golgi apparatus, where they undergo various post-translational modifications, such as glycosylation (the addition of sugar molecules) and sulfation. These modifications help determine the protein's final structure, function, and targeting.
2. Lipid modification: The Golgi apparatus also modifies lipids by adding or removing different functional groups, which can influence their properties and localization within the cell.
3. Protein sorting and packaging: Once proteins and lipids have been processed, they are sorted and packaged into vesicles at the trans face of the Golgi apparatus. These vesicles then transport their cargo to various destinations, such as lysosomes, plasma membrane, or extracellular space.
4. Intracellular transport: The Golgi apparatus serves as a central hub for intracellular trafficking, coordinating the movement of vesicles and other transport carriers between different organelles and cellular compartments.
5. Cell-cell communication: Some proteins that are processed and packaged in the Golgi apparatus are destined for secretion, playing crucial roles in cell-cell communication and maintaining tissue homeostasis.

In summary, the Golgi apparatus is a vital organelle involved in various cellular processes, including post-translational modification, sorting, packaging, and intracellular transport of proteins and lipids. Its proper functioning is essential for maintaining cellular homeostasis and overall organismal health.

Fluorescence microscopy is a type of microscopy that uses fluorescent dyes or proteins to highlight and visualize specific components within a sample. In this technique, the sample is illuminated with high-energy light, typically ultraviolet (UV) or blue light, which excites the fluorescent molecules causing them to emit lower-energy, longer-wavelength light, usually visible light in the form of various colors. This emitted light is then collected by the microscope and detected to produce an image.

Fluorescence microscopy has several advantages over traditional brightfield microscopy, including the ability to visualize specific structures or molecules within a complex sample, increased sensitivity, and the potential for quantitative analysis. It is widely used in various fields of biology and medicine, such as cell biology, neuroscience, and pathology, to study the structure, function, and interactions of cells and proteins.

There are several types of fluorescence microscopy techniques, including widefield fluorescence microscopy, confocal microscopy, two-photon microscopy, and total internal reflection fluorescence (TIRF) microscopy, each with its own strengths and limitations. These techniques can provide valuable insights into the behavior of cells and proteins in health and disease.

Nerve regeneration is the process of regrowth and restoration of functional nerve connections following damage or injury to the nervous system. This complex process involves various cellular and molecular events, such as the activation of support cells called glia, the sprouting of surviving nerve fibers (axons), and the reformation of neural circuits. The goal of nerve regeneration is to enable the restoration of normal sensory, motor, and autonomic functions impaired due to nerve damage or injury.

Time-lapse imaging is a medical imaging technique where images are captured at regular intervals over a period of time and then played back at a faster rate to show the progression or changes that occur during that time frame. This technique is often used in various fields of medicine, including microbiology, pathology, and reproductive medicine. In microbiology, for example, time-lapse imaging can be used to observe bacterial growth or the movement of individual cells. In pathology, it might help track the development of a lesion or the response of a tumor to treatment. In reproductive medicine, time-lapse imaging is commonly employed in embryo culture during in vitro fertilization (IVF) procedures to assess the development and quality of embryos before implantation.

Glucose is a simple monosaccharide (or single sugar) that serves as the primary source of energy for living organisms. It's a fundamental molecule in biology, often referred to as "dextrose" or "grape sugar." Glucose has the molecular formula C6H12O6 and is vital to the functioning of cells, especially those in the brain and nervous system.

In the body, glucose is derived from the digestion of carbohydrates in food, and it's transported around the body via the bloodstream to cells where it can be used for energy. Cells convert glucose into a usable form through a process called cellular respiration, which involves a series of metabolic reactions that generate adenosine triphosphate (ATP)—the main currency of energy in cells.

Glucose is also stored in the liver and muscles as glycogen, a polysaccharide (multiple sugar) that can be broken down back into glucose when needed for energy between meals or during physical activity. Maintaining appropriate blood glucose levels is crucial for overall health, and imbalances can lead to conditions such as diabetes mellitus.

The superior colliculi are a pair of prominent eminences located on the dorsal surface of the midbrain, forming part of the tectum or roof of the midbrain. They play a crucial role in the integration and coordination of visual, auditory, and somatosensory information for the purpose of directing spatial attention and ocular movements. Essentially, they are involved in the reflexive orienting of the head and eyes towards novel or significant stimuli in the environment.

In a more detailed medical definition, the superior colliculi are two rounded, convex mounds of gray matter that are situated on the roof of the midbrain, specifically at the level of the rostral mesencephalic tegmentum. Each superior colliculus has a stratified laminated structure, consisting of several layers that process different types of sensory information and control specific motor outputs.

The superficial layers of the superior colliculi primarily receive and process visual input from the retina, lateral geniculate nucleus, and other visual areas in the brain. These layers are responsible for generating spatial maps of the visual field, which allow for the localization and identification of visual stimuli.

The intermediate and deep layers of the superior colliculi receive and process auditory and somatosensory information from various sources, including the inferior colliculus, medial geniculate nucleus, and ventral posterior nucleus of the thalamus. These layers are involved in the localization and identification of auditory and tactile stimuli, as well as the coordination of head and eye movements towards these stimuli.

The superior colliculi also contain a population of neurons called "motor command neurons" that directly control the muscles responsible for orienting the eyes, head, and body towards novel or significant sensory events. These motor command neurons are activated in response to specific patterns of activity in the sensory layers of the superior colliculus, allowing for the rapid and automatic orientation of attention and gaze towards salient stimuli.

In summary, the superior colliculi are a pair of structures located on the dorsal surface of the midbrain that play a critical role in the integration and coordination of visual, auditory, and somatosensory information for the purpose of orienting attention and gaze towards salient stimuli. They contain sensory layers that generate spatial maps of the environment, as well as motor command neurons that directly control the muscles responsible for orienting the eyes, head, and body.

The hippocampus is a complex, curved formation in the brain that resembles a seahorse (hence its name, from the Greek word "hippos" meaning horse and "kampos" meaning sea monster). It's part of the limbic system and plays crucial roles in the formation of memories, particularly long-term ones.

This region is involved in spatial navigation and cognitive maps, allowing us to recognize locations and remember how to get to them. Additionally, it's one of the first areas affected by Alzheimer's disease, which often results in memory loss as an early symptom.

Anatomically, it consists of two main parts: the Ammon's horn (or cornu ammonis) and the dentate gyrus. These structures are made up of distinct types of neurons that contribute to different aspects of learning and memory.

GAP-43 protein, also known as growth-associated protein 43 or B-50, is a neuronal protein that is highly expressed during development and axonal regeneration. It is involved in the regulation of synaptic plasticity, nerve impulse transmission, and neurite outgrowth. GAP-43 is localized to the growth cones of growing axons and is thought to play a role in the guidance and navigation of axonal growth during development and regeneration. It is a member of the calcium/calmodulin-dependent protein kinase substrate family and undergoes phosphorylation by several protein kinases, including PKC (protein kinase C), which regulates its function. GAP-43 has been implicated in various neurological disorders, such as Alzheimer's disease, Parkinson's disease, and schizophrenia.

Confocal microscopy is a powerful imaging technique used in medical and biological research to obtain high-resolution, contrast-rich images of thick samples. This super-resolution technology provides detailed visualization of cellular structures and processes at various depths within a specimen.

In confocal microscopy, a laser beam focused through a pinhole illuminates a small spot within the sample. The emitted fluorescence or reflected light from this spot is then collected by a detector, passing through a second pinhole that ensures only light from the focal plane reaches the detector. This process eliminates out-of-focus light, resulting in sharp images with improved contrast compared to conventional widefield microscopy.

By scanning the laser beam across the sample in a raster pattern and collecting fluorescence at each point, confocal microscopy generates optical sections of the specimen. These sections can be combined to create three-dimensional reconstructions, allowing researchers to study cellular architecture and interactions within complex tissues.

Confocal microscopy has numerous applications in medical research, including studying protein localization, tracking intracellular dynamics, analyzing cell morphology, and investigating disease mechanisms at the cellular level. Additionally, it is widely used in clinical settings for diagnostic purposes, such as analyzing skin lesions or detecting pathogens in patient samples.

Autoradiography is a medical imaging technique used to visualize and localize the distribution of radioactively labeled compounds within tissues or organisms. In this process, the subject is first exposed to a radioactive tracer that binds to specific molecules or structures of interest. The tissue is then placed in close contact with a radiation-sensitive film or detector, such as X-ray film or an imaging plate.

As the radioactive atoms decay, they emit particles (such as beta particles) that interact with the film or detector, causing chemical changes and leaving behind a visible image of the distribution of the labeled compound. The resulting autoradiogram provides information about the location, quantity, and sometimes even the identity of the molecules or structures that have taken up the radioactive tracer.

Autoradiography has been widely used in various fields of biology and medical research, including pharmacology, neuroscience, genetics, and cell biology, to study processes such as protein-DNA interactions, gene expression, drug metabolism, and neuronal connectivity. However, due to the use of radioactive materials and potential hazards associated with them, this technique has been gradually replaced by non-radioactive alternatives like fluorescence in situ hybridization (FISH) or immunofluorescence techniques.

Video microscopy is a medical technique that involves the use of a microscope equipped with a video camera to capture and display real-time images of specimens on a monitor. This allows for the observation and documentation of dynamic processes, such as cell movement or chemical reactions, at a level of detail that would be difficult or impossible to achieve with the naked eye. Video microscopy can also be used in conjunction with image analysis software to measure various parameters, such as size, shape, and motion, of individual cells or structures within the specimen.

There are several types of video microscopy, including brightfield, darkfield, phase contrast, fluorescence, and differential interference contrast (DIC) microscopy. Each type uses different optical techniques to enhance contrast and reveal specific features of the specimen. For example, fluorescence microscopy uses fluorescent dyes or proteins to label specific structures within the specimen, allowing them to be visualized against a dark background.

Video microscopy is used in various fields of medicine, including pathology, microbiology, and neuroscience. It can help researchers and clinicians diagnose diseases, study disease mechanisms, develop new therapies, and understand fundamental biological processes at the cellular and molecular level.

A cell line is a culture of cells that are grown in a laboratory for use in research. These cells are usually taken from a single cell or group of cells, and they are able to divide and grow continuously in the lab. Cell lines can come from many different sources, including animals, plants, and humans. They are often used in scientific research to study cellular processes, disease mechanisms, and to test new drugs or treatments. Some common types of human cell lines include HeLa cells (which come from a cancer patient named Henrietta Lacks), HEK293 cells (which come from embryonic kidney cells), and HUVEC cells (which come from umbilical vein endothelial cells). It is important to note that cell lines are not the same as primary cells, which are cells that are taken directly from a living organism and have not been grown in the lab.

Protein binding, in the context of medical and biological sciences, refers to the interaction between a protein and another molecule (known as the ligand) that results in a stable complex. This process is often reversible and can be influenced by various factors such as pH, temperature, and concentration of the involved molecules.

In clinical chemistry, protein binding is particularly important when it comes to drugs, as many of them bind to proteins (especially albumin) in the bloodstream. The degree of protein binding can affect a drug's distribution, metabolism, and excretion, which in turn influence its therapeutic effectiveness and potential side effects.

Protein-bound drugs may be less available for interaction with their target tissues, as only the unbound or "free" fraction of the drug is active. Therefore, understanding protein binding can help optimize dosing regimens and minimize adverse reactions.

Rhodamines are not a medical term, but rather a class of chemical compounds that are commonly used as dyes and fluorescent tracers in various fields, including biology, chemistry, and material science. They absorb light at one wavelength and emit it at another, longer wavelength, which makes them useful for tracking and visualizing processes in living cells and tissues.

In a medical context, rhodamines may be used as part of diagnostic tests or procedures, such as in fluorescence microscopy or flow cytometry, to label and detect specific cells or molecules of interest. However, they are not typically used as therapeutic agents themselves.

Sodium azide is a chemical compound with the formula NaN3. Medically, it is not used as a treatment, but it can be found in some pharmaceutical and laboratory settings. It is a white crystalline powder that is highly soluble in water and has a relatively low melting point.

Sodium azide is well known for its ability to release nitrogen gas upon decomposition, which makes it useful as a propellant in airbags and as a preservative in laboratory settings to prevent bacterial growth. However, this property also makes it highly toxic to both animals and humans if ingested or inhaled, as it can cause rapid respiratory failure due to the release of nitrogen gas in the body. Therefore, it should be handled with great care and appropriate safety measures.

Amino acid transport systems refer to the various membrane transport proteins that are responsible for the active or passive translocation of amino acids across cell membranes in the body. These transport systems play a crucial role in maintaining amino acid homeostasis within cells and regulating their availability for protein synthesis, neurotransmission, and other physiological processes.

There are several distinct amino acid transport systems, each with its own specificity for particular types of amino acids or related molecules. These systems can be classified based on their energy requirements, substrate specificity, and membrane localization. Some of the major amino acid transport systems include:

1. System A - This is a sodium-dependent transport system that primarily transports small, neutral amino acids such as alanine, serine, and proline. It has several subtypes (ASC, A, and AN) with different substrate affinities and kinetic properties.
2. System L - This is a sodium-independent transport system that transports large, neutral amino acids such as leucine, isoleucine, valine, phenylalanine, and tryptophan. It has several subtypes (L1, L2, and y+L) with different substrate specificities and transport mechanisms.
3. System B0 - This is a sodium-dependent transport system that transports both neutral and basic amino acids such as arginine, lysine, and ornithine. It has several subtypes (B0,+, B0-, and b0,+) with different substrate affinities and kinetic properties.
4. System y+ - This is a sodium-independent transport system that transports primarily basic amino acids such as arginine, lysine, and ornithine. It has several subtypes (y+L, y+, b0,+) with different substrate specificities and transport mechanisms.
5. System X-AG - This is a sodium-independent antiporter system that exchanges glutamate and aspartate for neutral amino acids such as cystine, serine, and threonine. It plays an essential role in maintaining redox homeostasis by regulating the intracellular levels of cysteine, a precursor of glutathione.

These transport systems are critical for maintaining cellular homeostasis and regulating various physiological processes such as protein synthesis, neurotransmission, and immune function. Dysregulation of these transport systems has been implicated in several diseases, including cancer, neurological disorders, and cardiovascular disease. Therefore, understanding the molecular mechanisms underlying these transport systems is essential for developing novel therapeutic strategies to treat these conditions.

Fluorescent dyes are substances that emit light upon excitation by absorbing light of a shorter wavelength. In a medical context, these dyes are often used in various diagnostic tests and procedures to highlight or mark certain structures or substances within the body. For example, fluorescent dyes may be used in imaging techniques such as fluorescence microscopy or fluorescence angiography to help visualize cells, tissues, or blood vessels. These dyes can also be used in flow cytometry to identify and sort specific types of cells. The choice of fluorescent dye depends on the specific application and the desired properties, such as excitation and emission spectra, quantum yield, and photostability.

'Aplysia' is a genus of marine mollusks belonging to the family Aplysiidae, also known as sea hares. These are large, slow-moving herbivores that inhabit temperate and tropical coastal waters worldwide. They have a unique appearance with a soft, ear-like parapodia on either side of their body and a rhinophore at the front end, which they use to detect chemical cues in their environment.

One of the reasons 'Aplysia' is well-known in the medical and scientific community is because of its use as a model organism in neuroscience research. The simple nervous system of 'Aplysia' has made it an ideal subject for studying the basic principles of learning and memory at the cellular level.

In particular, the work of Nobel laureate Eric Kandel and his colleagues on 'Aplysia' helped to establish important concepts in synaptic plasticity, a key mechanism underlying learning and memory. By investigating how sensory stimulation can modify the strength of connections between neurons in 'Aplysia', researchers have gained valuable insights into the molecular and cellular mechanisms that underlie learning and memory processes in all animals, including humans.

'Drosophila proteins' refer to the proteins that are expressed in the fruit fly, Drosophila melanogaster. This organism is a widely used model system in genetics, developmental biology, and molecular biology research. The study of Drosophila proteins has contributed significantly to our understanding of various biological processes, including gene regulation, cell signaling, development, and aging.

Some examples of well-studied Drosophila proteins include:

1. HSP70 (Heat Shock Protein 70): A chaperone protein involved in protein folding and protection from stress conditions.
2. TUBULIN: A structural protein that forms microtubules, important for cell division and intracellular transport.
3. ACTIN: A cytoskeletal protein involved in muscle contraction, cell motility, and maintenance of cell shape.
4. BETA-GALACTOSIDASE (LACZ): A reporter protein often used to monitor gene expression patterns in transgenic flies.
5. ENDOGLIN: A protein involved in the development of blood vessels during embryogenesis.
6. P53: A tumor suppressor protein that plays a crucial role in preventing cancer by regulating cell growth and division.
7. JUN-KINASE (JNK): A signaling protein involved in stress response, apoptosis, and developmental processes.
8. DECAPENTAPLEGIC (DPP): A member of the TGF-β (Transforming Growth Factor Beta) superfamily, playing essential roles in embryonic development and tissue homeostasis.

These proteins are often studied using various techniques such as biochemistry, genetics, molecular biology, and structural biology to understand their functions, interactions, and regulation within the cell.

Amyloid beta-peptides (Aβ) are small protein fragments that are crucially involved in the pathogenesis of Alzheimer's disease. They are derived from a larger transmembrane protein called the amyloid precursor protein (APP) through a series of proteolytic cleavage events.

The two primary forms of Aβ peptides are Aβ40 and Aβ42, which differ in length by two amino acids. While both forms can be harmful, Aβ42 is more prone to aggregation and is considered to be the more pathogenic form. These peptides have the tendency to misfold and accumulate into oligomers, fibrils, and eventually insoluble plaques that deposit in various areas of the brain, most notably the cerebral cortex and hippocampus.

The accumulation of Aβ peptides is believed to initiate a cascade of events leading to neuroinflammation, oxidative stress, synaptic dysfunction, and neuronal death, which are all hallmarks of Alzheimer's disease. Although the exact role of Aβ in the onset and progression of Alzheimer's is still under investigation, it is widely accepted that they play a central part in the development of this debilitating neurodegenerative disorder.

Transfection is a term used in molecular biology that refers to the process of deliberately introducing foreign genetic material (DNA, RNA or artificial gene constructs) into cells. This is typically done using chemical or physical methods, such as lipofection or electroporation. Transfection is widely used in research and medical settings for various purposes, including studying gene function, producing proteins, developing gene therapies, and creating genetically modified organisms. It's important to note that transfection is different from transduction, which is the process of introducing genetic material into cells using viruses as vectors.

Phosphorylation is the process of adding a phosphate group (a molecule consisting of one phosphorus atom and four oxygen atoms) to a protein or other organic molecule, which is usually done by enzymes called kinases. This post-translational modification can change the function, localization, or activity of the target molecule, playing a crucial role in various cellular processes such as signal transduction, metabolism, and regulation of gene expression. Phosphorylation is reversible, and the removal of the phosphate group is facilitated by enzymes called phosphatases.

Nocodazole is not a medical condition or disease, but rather a pharmacological agent used in medical research and clinical settings. It's a synthetic chemical compound that belongs to the class of drugs known as microtubule inhibitors. Nocodazole works by binding to and disrupting the dynamic assembly and disassembly of microtubules, which are important components of the cell's cytoskeleton and play a critical role in cell division.

Nocodazole is primarily used in research settings as a tool for studying cell biology and mitosis, the process by which cells divide. It can be used to synchronize cells in the cell cycle or to induce mitotic arrest, making it useful for investigating various aspects of cell division and chromosome behavior.

In clinical settings, nocodazole has been used off-label as a component of some cancer treatment regimens, particularly in combination with other chemotherapeutic agents. Its ability to disrupt microtubules can interfere with the proliferation of cancer cells and enhance the effectiveness of certain anti-cancer drugs. However, its use is not widespread due to potential side effects and the availability of alternative treatments.

I believe there may be some confusion in your question. "Rabbits" is a common name used to refer to the Lagomorpha species, particularly members of the family Leporidae. They are small mammals known for their long ears, strong legs, and quick reproduction.

However, if you're referring to "rabbits" in a medical context, there is a term called "rabbit syndrome," which is a rare movement disorder characterized by repetitive, involuntary movements of the fingers, resembling those of a rabbit chewing. It is also known as "finger-chewing chorea." This condition is usually associated with certain medications, particularly antipsychotics, and typically resolves when the medication is stopped or adjusted.

Papilledema is a medical term that refers to swelling of the optic nerve head, also known as the disc, which is the point where the optic nerve enters the back of the eye (the retina). This swelling can be caused by increased pressure within the skull, such as from brain tumors, meningitis, or idiopathic intracranial hypertension. Papilledema is usually detected through a routine eye examination and may be accompanied by symptoms such as headaches, visual disturbances, and nausea. If left untreated, papilledema can lead to permanent vision loss.

C57BL/6 (C57 Black 6) is an inbred strain of laboratory mouse that is widely used in biomedical research. The term "inbred" refers to a strain of animals where matings have been carried out between siblings or other closely related individuals for many generations, resulting in a population that is highly homozygous at most genetic loci.

The C57BL/6 strain was established in 1920 by crossing a female mouse from the dilute brown (DBA) strain with a male mouse from the black strain. The resulting offspring were then interbred for many generations to create the inbred C57BL/6 strain.

C57BL/6 mice are known for their robust health, longevity, and ease of handling, making them a popular choice for researchers. They have been used in a wide range of biomedical research areas, including studies of cancer, immunology, neuroscience, cardiovascular disease, and metabolism.

One of the most notable features of the C57BL/6 strain is its sensitivity to certain genetic modifications, such as the introduction of mutations that lead to obesity or impaired glucose tolerance. This has made it a valuable tool for studying the genetic basis of complex diseases and traits.

Overall, the C57BL/6 inbred mouse strain is an important model organism in biomedical research, providing a valuable resource for understanding the genetic and molecular mechanisms underlying human health and disease.

Nerve Growth Factors (NGFs) are a family of proteins that play an essential role in the growth, maintenance, and survival of certain neurons (nerve cells). They were first discovered by Rita Levi-Montalcini and Stanley Cohen in 1956. NGF is particularly crucial for the development and function of the peripheral nervous system, which connects the central nervous system to various organs and tissues throughout the body.

NGF supports the differentiation and survival of sympathetic and sensory neurons during embryonic development. In adults, NGF continues to regulate the maintenance and repair of these neurons, contributing to neuroplasticity – the brain's ability to adapt and change over time. Additionally, NGF has been implicated in pain transmission and modulation, as well as inflammatory responses.

Abnormal levels or dysfunctional NGF signaling have been associated with various medical conditions, including neurodegenerative diseases (e.g., Alzheimer's and Parkinson's), chronic pain disorders, and certain cancers (e.g., small cell lung cancer). Therefore, understanding the role of NGF in physiological and pathological processes may provide valuable insights into developing novel therapeutic strategies for these conditions.

Intermediate filament proteins (IFPs) are a type of cytoskeletal protein that form the intermediate filaments (IFs), which are one of the three major components of the cytoskeleton in eukaryotic cells, along with microtubules and microfilaments. These proteins have a unique structure, characterized by an alpha-helical rod domain flanked by non-helical head and tail domains.

Intermediate filament proteins are classified into six major types based on their amino acid sequence: Type I (acidic) and Type II (basic) keratins, Type III (desmin, vimentin, glial fibrillary acidic protein, and peripherin), Type IV (neurofilaments), Type V (lamins), and Type VI (nestin). Each type of IFP has a distinct pattern of expression in different tissues and cell types.

Intermediate filament proteins play important roles in maintaining the structural integrity and mechanical strength of cells, providing resilience to mechanical stress, and regulating various cellular processes such as cell division, migration, and signal transduction. Mutations in IFP genes have been associated with several human diseases, including cancer, neurodegenerative disorders, and genetic skin fragility disorders.

Nerve Growth Factor (NGF) is a small secreted protein that is involved in the growth, maintenance, and survival of certain neurons (nerve cells). It was the first neurotrophin to be discovered and is essential for the development and function of the nervous system. NGF binds to specific receptors on the surface of nerve cells and helps to promote their differentiation, axonal growth, and synaptic plasticity. Additionally, NGF has been implicated in various physiological processes such as inflammation, immune response, and wound healing. Deficiencies or excesses of NGF have been linked to several neurological disorders, including Alzheimer's disease, Parkinson's disease, and pain conditions.

Hydrogen-ion concentration, also known as pH, is a measure of the acidity or basicity of a solution. It is defined as the negative logarithm (to the base 10) of the hydrogen ion activity in a solution. The standard unit of measurement is the pH unit. A pH of 7 is neutral, less than 7 is acidic, and greater than 7 is basic.

In medical terms, hydrogen-ion concentration is important for maintaining homeostasis within the body. For example, in the stomach, a high hydrogen-ion concentration (low pH) is necessary for the digestion of food. However, in other parts of the body such as blood, a high hydrogen-ion concentration can be harmful and lead to acidosis. Conversely, a low hydrogen-ion concentration (high pH) in the blood can lead to alkalosis. Both acidosis and alkalosis can have serious consequences on various organ systems if not corrected.

Adenosine Triphosphate (ATP) is a high-energy molecule that stores and transports energy within cells. It is the main source of energy for most cellular processes, including muscle contraction, nerve impulse transmission, and protein synthesis. ATP is composed of a base (adenine), a sugar (ribose), and three phosphate groups. The bonds between these phosphate groups contain a significant amount of energy, which can be released when the bond between the second and third phosphate group is broken, resulting in the formation of adenosine diphosphate (ADP) and inorganic phosphate. This process is known as hydrolysis and can be catalyzed by various enzymes to drive a wide range of cellular functions. ATP can also be regenerated from ADP through various metabolic pathways, such as oxidative phosphorylation or substrate-level phosphorylation, allowing for the continuous supply of energy to cells.

... called an axonal spheroid, may result. Because axonal transport can be disrupted in a multitude of ways, axonal spheroids can ... The basic mechanism of fast axonal transport has been understood for decades but the mechanism of slow axonal transport is only ... it is likely that axonal transport is a key player in mediating pathology. Dysfunctional axonal transport is also linked to ... Intraflagellar transport Sabry J, O'Connor TP, Kirschner MW (June 1995). "Axonal transport of tubulin in Ti1 pioneer neurons in ...
Growing evidence supports the concept that deficits in axonal transport contributes to pathogenesis in multiple ... Chevalier-Larsen E, Holzbaur EL (2006). "Axonal transport and neurodegenerative disease". Biochimica et Biophysica Acta (BBA ... The transport mechanism depends on the material being moved. Intracellular transport that requires quick movement will use an ... Intracellular transport is the movement of vesicles and substances within a cell. Intracellular transport is required for ...
The fast axonal transport has a rate of 50-500 mm per day, while the slow axonal transport was found to be 0.4 mm per day in ... The cargoes are transported by motor proteins that uses neurotubules as a 'track'. The axonal transport can be classified ... Transport of insoluble protein contributes to the fast movement while the slow transport is transporting up to 40% - 50% ... As a result, essential processes in the neuron such as axonal transport and neural communication will be disrupted, forming the ...
Saxton, William M.; Hollenbeck, Peter J. (2012). "The axonal transport of mitochondria". Journal of Cell Science. 125 (9): 2095 ... Once mitophagy is initiated, Atg32 binds to Atg11 and the Atg32-associated mitochondria are transported to the vacuole. Atg32 ... This distribution is maintained largely by motor protein-mediated mitochondrial transport along the axon. While neuronal ... Arduíno, DM; Esteves, AR; Cardoso, SM (2011). "Mitochondrial fusion/fission, transport and autophagy in Parkinson's disease: ...
The number of neurofilaments in the axon is thought to be determined by neurofilament gene expression and axonal transport. The ... Brown A (November 2000). "Slow axonal transport: stop and go traffic in the axon". Nature Reviews. Molecular Cell Biology. 1 (2 ... Thus on long time scales neurofilaments move in the slow component of axonal transport. Numerous specific antibodies to ... Hoffman PN, Lasek RJ (August 1975). "The slow component of axonal transport. Identification of major structural polypeptides of ...
... they may damage molecular motors and microtubules to interfere with normal axonal transport, leading to impaired transport of ... Impaired axonal transport of alpha-synuclein may also lead to its accumulation in Lewy bodies. Experiments have revealed ... Axonal transport can be disrupted by a variety of mechanisms including damage to: kinesin and cytoplasmic dynein, microtubules ... When axonal transport is severely disrupted a degenerative pathway known as Wallerian-like degeneration is often triggered. ...
Axonal transport continues up to the point of the break in the cytoskeleton, but no further, leading to a buildup of transport ... such as interrupted axonal transport, progressive swellings known as axonal varicosities, and degeneration. Recent studies have ... Since axonal damage in DAI is largely a result of secondary biochemical cascades, it has a delayed onset, so a person with DAI ... Diffuse axonal injury (DAI) is a brain injury in which scattered lesions occur over a widespread area in white matter tracts as ...
Axonal transport occurs either by fast or slow transport. Fast transport involves vesicular contents (like organelles) being ... In axonal transport (also known as axoplasmic transport) materials are carried through the axoplasm to or from the soma. The ... When an axon is damaged, both axonal translation and retrograde axonal transport are required to propagate a signal to the soma ... Young, Tang (2013). "Fast Vesicle Transport Is Required for the Slow Axonal Transport of Synapsin". Neuroscience. 33 (39): ...
Schindowski K, Belarbi K, Buée L (February 2008). "Neurotrophic factors in Alzheimer's disease: role of axonal transport". ... destroying the structure of the cell's cytoskeleton which collapses the neuron's transport system. A number of studies connect ... creating neurofibrillary tangles and disintegrating the neuron's transport system. Pathogenic tau can also cause neuronal death ...
"BPAG1n4 is essential for retrograde axonal transport in sensory neurons". The Journal of Cell Biology. 163 (2): 223-9. doi: ... "The interaction between cytoplasmic dynein and dynactin is required for fast axonal transport". Proceedings of the National ... It is involved in a diverse array of cellular functions, including ER-to-Golgi transport, the centripetal movement of lysosomes ...
... conversion of a putative precursor during axonal transport". Science. 195 (4284): 1354-6. Bibcode:1977Sci...195.1354G. doi: ... It is well established that the finished vasopressin product is transported from the cell body to the terminals in the ...
January 2013). "Vesicular glycolysis provides on-board energy for fast axonal transport". Cell. 152 (3): 479-491. doi:10.1016/j ... and fast axonal, or axoplasmic transport. In sperm, a testis-specific isoenzyme GAPDHS is expressed. Under normal cellular ... GAPDH also appears to be involved in the vesicle transport from the endoplasmic reticulum (ER) to the Golgi apparatus which is ... nuclear tRNA transport, DNA replication, and DNA repair. In addition, nuclear translocation of GAPDH has been reported in ...
October 2003). "BPAG1n4 is essential for retrograde axonal transport in sensory neurons". The Journal of Cell Biology. 163 (2 ... In humans, loss of dystonin function can cause hereditary sensory and autonomic neuropathy type VI and axonal Charcot-Marie- ...
Jones CW, Pickering BT (December 1972). "Intra-axonal transport and turnover of neurohypophysial hormones in the rat". J. ... They are then transported in neurosecretory granules along axons within the hypothalamo-neurohypophysial tract by axoplasmic ...
Choi SI, Vidal R, Frangione B, Levy E (2004). "Axonal transport of British and Danish amyloid peptides via secretory vesicles ...
Yoo S, van Niekerk EA, Merianda TT, Twiss JL (2010). "Dynamics of axonal mRNA transport and implications for peripheral nerve ... In this process, new material is added at the growth cone while the remainder of the axonal cytoskeleton remains stationary. ... Actin filaments are also constantly being transported away from the leading edge by a myosin-motor driven process known as ... Axon guidance directs the initial wiring of the nervous system and is also important in axonal regeneration following an injury ...
A second mechanism of reaching the brain tissue is achieved through intra-axonal transport. In this mechanism, Listeria travels ... Dons L, Jin Y, Kristensson K, Rottenberg ME (2007). "Axonal transport of Listeria monocytogenes and nerve-cell-induced ... Similar to the mechanism seen in HIV, infected leukocytes in the blood cross the blood brain barrier and transport Listeria ... or tunneling nanotubes directed toward neighboring cells in a culture of rat PC12 cells have been shown to facilitate transport ...
"Rabies Virus Hijacks and accelerates the p75NTR retrograde axonal transport machinery". PLOS Pathogens. 10 (8): e1004348. doi: ... The virus then travels through the nerve cell axon via retrograde transport, as its P protein interacts with dynein, a protein ... and is then transported to the Golgi apparatus, where a sugar group is added to it (glycosylation). When there are enough viral ...
Her main area of interest is regulation of axonal transport within nerve cells. She is a recipient of the International Early ... Following this approach, her group is starting to uncover regulation of each of the various steps of axonal transport, such as ... Studying this process is challenging, partly because anesthetising model organism also suspends axonal transport. So, watching ... Through this approach, live worm is immobilised in a chip and axonal transport studied. ...
2001). "Kinesin-dependent axonal transport is mediated by the sunday driver (SYD) protein". Cell. 103 (4): 583-94. doi:10.1016/ ... "Kinesin-dependent axonal transport is mediated by the sunday driver (SYD) protein". Cell. UNITED STATES. 103 (4): 583-94. doi: ... The C. elegans counterpart of this gene is found to regulate synaptic vesicle transport, possibly by integrating JNK signaling ... 2002). "UNC-16, a JNK-signaling scaffold protein, regulates vesicle transport in C. elegans". Neuron. 32 (5): 787-800. doi: ...
The function of huntingtin (Htt) is not well understood but it is involved in axonal transport. Huntingtin is essential for ... Vitet H, Brandt V, Saudou F (August 2020). "Traffic signaling: new functions of huntingtin and axonal transport in neurological ... These appear to indicate a functional role in cytoskeletal anchoring or transport of mitochondria. The Htt protein is involved ... Within cells, huntingtin may or may not be involved in signaling, transporting materials, binding proteins and other structures ...
2001). "Axonal transport of amyloid precursor protein is mediated by direct binding to the kinesin light chain subunit of ... "Kinesin-dependent axonal transport is mediated by the sunday driver (SYD) protein". Cell. 103 (4): 583-94. doi:10.1016/S0092- ... Conventional kinesin is a tetrameric molecule composed of two heavy chains and two light chains, and transports various cargos ...
December 2008). "UNC-51/ATG1 kinase regulates axonal transport by mediating motor-cargo assembly". Genes Dev. 22 (23): 3292-307 ... The corresponding homologue to Atg1 in C. elegans is unc-51 (uncoordinated-51). Unc-51 also functions in proper axonal guidance ... October 1994). "Caenorhabditis elegans unc-51 gene required for axonal elongation encodes a novel serine/threonine kinase". ...
"Kinesin-dependent axonal transport is mediated by the sunday driver (SYD) protein". Cell. 103 (4): 583-94. doi:10.1016/S0092- ...
"Kinesin-dependent axonal transport is mediated by the sunday driver (SYD) protein". Cell. 103 (4): 583-94. doi:10.1016/S0092- ...
"Kinesin-dependent axonal transport is mediated by the sunday driver (SYD) protein". Cell. 103 (4): 583-94. doi:10.1016/S0092- ... "Kinesin-dependent axonal transport is mediated by the sunday driver (SYD) protein". Cell. 103 (4): 583-94. doi:10.1016/S0092- ...
Gelsolin inhibition of fast axonal transport indicates a requirement for actin microfilaments. Nature, 1984; 310:56-58. 82. ... Calcium transport by macrophage plasma membranes. J Biol Chem. 1980; 255:5841-5846. 54. Amrein PC, Stossel TP. Prevention of ... Transport of Macromolecules in Biological Systems. Berlin: Dahlem Konferenzen, 1978:503-16. 36. Stossel TP, Hartwig JH, Yin HL ... In: Current Topics in Membranes and Transport. 1990; 36:97-107. 66. Stossel TP. How cells crawl. American Scientist. 1990; 78: ...
R2 vaccines retain native replication in epithelial cells but are incapable of retrograde axonal transport and invasion of the ... "The pUL37 tegument protein guides alpha-herpesvirus retrograde axonal transport to promote neuroinvasion". PLOS Pathogens. 13 ( ...
"The interaction between cytoplasmic dynein and dynactin is required for fast axonal transport". Proceedings of the National ... In addition to transport of various organelles in the cytoplasm, dynactin also links kinesin II to organelles. Motor protein ... Schroer TA, Sheetz MP (December 1991). "Two activators of microtubule-based vesicle transport". The Journal of Cell Biology. ... Carter AP, Diamant AG, Urnavicius L (April 2016). "How dynein and dynactin transport cargos: a structural perspective". Current ...
Kratchmarov R, Taylor MP, Enquist LW (2013). "Role of us9 phosphorylation in axonal sorting and anterograde transport of ... In the retrograde direction, SuHV-1-Bartha is transported to a neuronal cell body via its axon, where it is replicated and ... Koyuncu OO, Perlman DH, Enquist LW (Jan 16, 2013). "Efficient retrograde transport of pseudorabies virus within neurons ... the extent to which non-synaptic transneuronal transport may also occur is uncertain. Using temporal studies and/or genetically ...
... called an axonal spheroid, may result. Because axonal transport can be disrupted in a multitude of ways, axonal spheroids can ... The basic mechanism of fast axonal transport has been understood for decades but the mechanism of slow axonal transport is only ... it is likely that axonal transport is a key player in mediating pathology. Dysfunctional axonal transport is also linked to ... Intraflagellar transport Sabry J, OConnor TP, Kirschner MW (June 1995). "Axonal transport of tubulin in Ti1 pioneer neurons in ...
... death has been ascribed mainly to the interruption of a trophic factor supply from target structures rather than to the axonal ... Axonal transport blockade in the neonatal rat optic nerve induces limited retinal ganglion cell death J Neurosci. 1997 Sep 15; ... We found that axonal transport blockade induced only a limited number of pyknotic RGCs. Degeneration of these cells was ... To distinguish between these two possibilities, we induced a reversible axonal transport blockade in the developing optic nerve ...
retrograde axonal protein transport. 2. retrograde axonal transport of mitochondrion. 3. retrograde neuronal dense core vesicle ... retrograde axonal protein transport. 2. retrograde axonal transport of mitochondrion. 3. retrograde neuronal dense core vesicle ...
Microtubule Motors and Axonal Transport: Function and Dysfunction in Neurodegenerative Disease ... Axonal Transport--physiology. Microtubule-Organizing Center--physiology. Neurodegenerative Diseases--physiopathology. ... Microtubule motors and axonal transport : function and dysfunction in neurodegenerative disease / Erika Holzbaur. ... and in more specialized functions such as the transport of vesicles along the extended axonal processes of the neuron. Her ...
We have identified two slowly moving groups of axonally transported proteins in guinea pig retinal ganglion cell axons (4). The ... Slow components of axonal transport: two cytoskeletal networks. M M Black, M M Black ... M M Black, R J Lasek; Slow components of axonal transport: two cytoskeletal networks.. J Cell Biol 1 August 1980; 86 (2): 616- ... Axonal transport of calmodulin: a physiologic approach to identification of long-term associations between proteins. ...
... conduct organelle transport in axons, but recent studies on extruded squid axoplasm have suggested th ... Axonal transport of mitochondria along microtubules and F-actin in living vertebrate neurons.. J Cell Biol (1995) 131 (5): 1315 ...
The role of axonal transport disruption in the development of axonal mechanical sensitivity in intact C-fibre neurons. Goodwin ... The role of axonal transport disruption in the development of axonal mechanical sensitivity in intact C-fibre neurons ... Axonal transport disruption is hypothesised to cause an accumulation of anterogradely transported mechanically sensitive ion ... The main aim of this study was to investigate the role of axonal transport disruption in the development of AMS. Specific aims ...
Anterograde axonal transport of chicken cellular prion protein (PrPc) in vivo requires its N-terminal part. In: Journal of ... Anterograde axonal transport of chicken cellular prion protein (PrPc) in vivo requires its N-terminal part. / Butowt, R; Davies ... Anterograde axonal transport of chicken cellular prion protein (PrPc) in vivo requires its N-terminal part. Journal of ... Butowt, R., Davies, P., & Brown, D. R. (2007). Anterograde axonal transport of chicken cellular prion protein (PrPc) in vivo ...
"Axonal Transport" by people in this website by year, and whether "Axonal Transport" was a major or minor topic of these ... "Axonal Transport" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical Subject ... The directed transport of ORGANELLES and molecules along nerve cell AXONS. Transport can be anterograde (from the cell body) or ... Below are the most recent publications written about "Axonal Transport" by people in Profiles. ...
The major goal of the proposed research is to elucidate mechanisms that underlie transport of membranous organelles that are ... Axonal Cytoskeleton in Cytomembrane Transport Koenig, Edward State University of New York at Buffalo, Buffalo, NY, United ... Axonal Cytoskeleton in Cytomembrane Transport. Koenig, Edward / State University of New York at Buffalo. ... Axonal Cytoskeleton in Cytomembrane Transport. Koenig, Edward / State University of New York at Buffalo. ...
You can play a book Axonal Transport in Neuronal g and buy your facilities. apparent studies will frequently like latter in ... Book Axonal Transport In Neuronal Growth And Regeneration. Book Axonal Transport In Neuronal Growth And Regeneration. by ... The book Axonal Transport passes before reset, or occurs frustrated issued. find way or hope books to find what you use lacking ... The book Axonal Transport is the star to the representation; the part is the group;. While owner; as correctly additional to ...
Retrograde axonal transport of dopamine β hydroxylase. / Brimijoin, S. In: Biochemical Pharmacology, Vol. 23, No. Sup. 1, 01.01 ... Brimijoin, S 1974, Retrograde axonal transport of dopamine β hydroxylase, Biochemical Pharmacology, vol. 23, no. Sup. 1, pp. ... Retrograde axonal transport of dopamine β hydroxylase. Biochemical Pharmacology. 1974 Jan 1;23(Sup. 1):140-142. ... Brimijoin, S. / Retrograde axonal transport of dopamine β hydroxylase. In: Biochemical Pharmacology. 1974 ; Vol. 23, No. Sup. 1 ...
Thus, we find a specific epigenetic mechanism that regulates axonal regeneration of CNS axons, suggesting novel targets for ... Finally, PCAF is necessary for conditioning-dependent axonal regeneration and also singularly promotes regeneration after ... Axonal regenerative failure is a major cause of neurological impairment following central nervous system (CNS) but not ... 3 Lys 9 at the promoters of established key regeneration-associated genes following a peripheral but not a central axonal ...
Furthermore, TNF-α inhibited axonal transport of mitochondria in a similar manner. Consistently, TNF-α induced axonal transport ... Disturbance of axonal transport and accumulation of axonally transported organelles is an early sign of neuroinflammatory ... Inhibition of axonal transport by NO or TNF-α was associated with a significantly increased fraction of immobile particles. ... Axonal transport of mitochondria or synaptic vesicle precursors via the kinesin motor protein is essential to keep the ...
2013) Vesicular glycolysis provides on-board energy for fast axonal transport. Cell 152:479-491. doi:10.1016/j.cell.2012.12.029 ... Microtubule-based axonal transport of organelles and proteins represents an additional component of axon extension that ... Glycolysis powers the fast axonal transport of some vesicular cargoes but not mitochondria (Spillane et al., 2013; Zala et al ... 2020) Mechanism and role of the intra-axonal calreticulin translation in response to axonal injury. Exp Neurol 323:113072. doi: ...
Axonal transport of glycoproteins (gC, gD, and gE) was unaffected. Using TEM, there was a marked reduction or absence of ... Axonal transport of glycoproteins (gC, gD, and gE) was unaffected. Using TEM, there was a marked reduction or absence of ... Axonal transport of glycoproteins (gC, gD, and gE) was unaffected. Using TEM, there was a marked reduction or absence of ... Axonal transport of glycoproteins (gC, gD, and gE) was unaffected. Using TEM, there was a marked reduction or absence of ...
Role Of Actin Filaments In The Axonal Transport Of Microtubules. Thomas P. Hasaka; Kenneth A. Myers; and Peter W. Baas Drexel ...
TTc serves as an imaging biomarker for normal axonal transport and demonstrates impairment of axonal transport early in the ... TTc serves as an imaging biomarker for normal axonal transport and demonstrates impairment of axonal transport early in the ... TTc serves as an imaging biomarker for normal axonal transport and demonstrates impairment of axonal transport early in the ... TTc serves as an imaging biomarker for normal axonal transport and demonstrates impairment of axonal transport early in the ...
Is there retrograde axonal transport of tetanus toxin in both alpha and beta fibres? ... Is there retrograde axonal transport of tetanus toxin in both alpha and beta fibres? ...
Axonal Transport * Cerebellar Nuclei / anatomy & histology * Cerebellar Nuclei / physiology * Cerebellum / anatomy & histology ...
... which is called the slow axonal transport. Experiments using photo-bleached live-cell imaging observed that the slow axonal ... Brown A: Slow axonal transport: stop and go traffic in the axon. Nat. Rev. Mol. Cell Biol. 2000, 1: 153-156. 10.1038/35040102. ... Deciphering the axonal transport kinetics of neurofilaments using the fluorescence photo-activation pulse-escape method. * ... Brown A: Axonal transport of membraneous and nonmembranous cargoes: a unified perspective. J Cell Biol. 2003, 160: 817-821. ...
inhibition of axonal transport;. *accumulation of amyloidβ peptide;. *alterations in gene expression and binding to DNA; ...
Thus, the identification of this mutation provides further support for the role of the cytoskeleton and axonal transport in ALS ... This type of axonal degeneration can be seen in the brain on biopsy as atrophy and pallor of myelinated motor axons in the ... Axonal degeneration. Motor axons die by Wallerian degeneration in ALS, and large motor neurons are affected to a greater extent ... Remarkably, while reduction in TDP-43 is shown to inhibit axonal regeneration of iPSC-derived motor neurons, rescue of stathmin ...
keywords = "Axonal transport, Carbon disulfide, Giant axonal neuropathy, Neurofilament, Toxic neuropathy",. author = "Miguel ... The role of axonal transport in the development of structural changes of axons can be examined using experimental models. Two ... It is suggested that acceleration of NF transport and proximal reduction of axon caliber are the hallmarks of giant axonal ... It is suggested that acceleration of NF transport and proximal reduction of axon caliber are the hallmarks of giant axonal ...
Axonal transport could even be seen as the neurons Achilles heel because it is so vulnerable to disruption (Mobley). ... Axonal Transport. Neurons have a particular problem with intracellular communication because the elongated axon and dendrites ... It is through knowing the proper roles, points of transport/processing and what goes wrong in the system that we may devise ... APP synthesized in the cell body is transported along the axon to the terminals in vesicles carried by kinesin, and some ...
Modeling Bidirectional Transport of New and Used Organelles in Fast Axonal Transport in Neurons J. Heat Transfer (January,2011) ... Neurofilaments Are Transported Rapidly but Intermittently in Axons: Implications for Slow Axonal Transport ... Bidirectional, Unlike Unidirectional Transport, Allows Transporting Axonal Cargos Against Their Concentration Gradient ... However, our modeling results unexpectedly predict that slow axonal transport fails to transport cargos against their ...
In the study described here we evaluated the effects of the commonly used OP-pesticide, chlorpyrifos (CPF) on axonal transport ... In subsequent studies both single and repeated exposures to CPF were evaluated for effects on axonal transport using MEMRI. As ... In the study described here we evaluated the effects of the commonly used OP-pesticide, chlorpyrifos (CPF) on axonal transport ... In subsequent studies both single and repeated exposures to CPF were evaluated for effects on axonal transport using MEMRI. As ...
Axonal Transport and Cytoskeleton. *Place: Poster (Hall No.1 Building, Kobe International Exhibition Hall) ... Axonal Transport and Cytoskeleton. *Place: Poster (Hall No.1 Building, Kobe International Exhibition Hall) ... Axonal/Dendritic Growth and Circuit Formation. *Place: Poster (Hall No.1 Building, Kobe International Exhibition Hall) ... Axonal/Dendritic Growth and Circuit Formation. *Place: Poster (Hall No.1 Building, Kobe International Exhibition Hall) ...
Axonal Transport and Cytoskeleton. *Place: Poster (Hall No.1 Building, Kobe International Exhibition Hall) ... Axonal Transport and Cytoskeleton. *Place: Poster (Hall No.1 Building, Kobe International Exhibition Hall) ... Axonal/Dendritic Growth and Circuit Formation. *Place: Poster (Hall No.1 Building, Kobe International Exhibition Hall) ... Axonal/Dendritic Growth and Circuit Formation. *Place: Poster (Hall No.1 Building, Kobe International Exhibition Hall) ...
... the importin family of nucleocytoplasmic transport factors and molecular motors such as dynein; and demonstration of the ... for axon-soma communication in the injured nerve and shed light on the integration of cytoplasmic and nuclear transport in all ... Neuronal regeneration after nerve injury requires new transcription; thus, long-distance retrograde signalling from axonal ... Vesicular glycolysis provides on-board energy for fast axonal transport. Cell 152, 479-491 (2013). This intriguing study ...
  • The basic mechanism of fast axonal transport has been understood for decades but the mechanism of slow axonal transport is only recently becoming clear, as a result of advanced imaging techniques. (wikipedia.org)
  • The mechanism is known as the "Stop and Go" model of slow axonal transport, and has been extensively validated for the transport of the cytoskeletal protein neurofilament. (wikipedia.org)
  • We relate these results to our general hypothesis that slow axonal transport represents the movements of structural complexes of proteins. (rupress.org)
  • Experiments using photo-bleached live-cell imaging observed that the slow axonal transport of NFs is characterized by a rapidly intermittent, bidirectional movement [ 1 , 3 ]. (biomedcentral.com)
  • Brown A: Slow axonal transport: stop and go traffic in the axon. (biomedcentral.com)
  • Brown A: Live-cell imaging of slow axonal transport in cultured neurons. (biomedcentral.com)
  • However, our modeling results unexpectedly predict that slow axonal transport fails to transport cargos against their concentration gradient without dynein. (asme.org)
  • The obtained results explain why slow axonal transport must be bidirectional to allow for the maintenance of concentration gradients along the axon length. (asme.org)
  • Our result is limited to small cargo diffusivity, which is a reasonable assumption for many slow axonal transport cargos (such as cytosolic and cytoskeletal proteins, neurofilaments, actin, and microtubules) which are transported as large multiprotein complexes or polymers. (asme.org)
  • MPS integrity relies on spectrin delivery via slow axonal transport, a process that remains poorly understood. (bvsalud.org)
  • These results provide insight into slow axonal transport and MPS integrity. (bvsalud.org)
  • Axonal transport, also called axoplasmic transport or axoplasmic flow, is a cellular process responsible for movement of mitochondria, lipids, synaptic vesicles, proteins, and other organelles to and from a neuron's cell body, through the cytoplasm of its axon called the axoplasm. (wikipedia.org)
  • Axonal transport is also responsible for moving molecules destined for degradation from the axon back to the cell body, where they are broken down by lysosomes. (wikipedia.org)
  • Axonal transport can be fast or slow, and anterograde (away from the cell body) or retrograde (conveys materials from axon to cell body). (wikipedia.org)
  • A 15-amino acid peptide in the cytoplasmic carboxyl terminus of APP binds with high affinity to conventional kinesin-1 and mediates transport of exogenous cargo in the giant axon of the squid. (wikipedia.org)
  • and (iv) to utilize in vitro and in situ Mauthner neuron preparations for studying rapid transport in the axon. (grantome.com)
  • Axonal transport of mitochondria or synaptic vesicle precursors via the kinesin motor protein is essential to keep the integrity of the axon and synapse. (uni-goettingen.de)
  • These data indicate that the glycolytic pathway is operative in distal axons and contributes to the rate of axon extension and growth cone dynamics in the presence of NGF and that, in the absence of NGF, the axonal glycolytic pathway is required for axon maintenance. (jneurosci.org)
  • In this study, we used both confocal microscopy and transmission electron microscopy (TEM) to examine the role of pUS9 in the anterograde transport and assembly of HSV-1 in the distal axon of human and rat dorsal root ganglion (DRG) neurons using US9 deletion (US9(-)), repair (US9R), and wild-type (strain F, 17, and KOS) viruses. (edu.au)
  • Thus, our findings indicate that pUS9 contributes to the overall HSV-1 anterograde axonal transport, including a major role in virus assembly at the axon terminus, which is not essential in the neuronal cell body. (edu.au)
  • We previously reported that following administration of 2,5-HD, transport of NF is accelerated while number of NF and cross-sectional area are decreased in regions of the axon proximal to the enlargements. (utmb.edu)
  • It is suggested that acceleration of NF transport and proximal reduction of axon caliber are the hallmarks of giant axonal neuropathies with distal NF-containing enlargements at stages of the disease preceding axonal degeneration. (utmb.edu)
  • Here, we report computational studies of bidirectional transport in an axon, specifically focusing on predictions when the retrograde motor becomes dysfunctional. (asme.org)
  • We use two different models to simulate bidirectional transport in an axon: an anterograde-retrograde model, which neglects passive transport by diffusion in the cytosol, and a full slow transport model, which includes passive transport by diffusion in the cytosol. (asme.org)
  • These recent findings provide a coherent mechanistic framework for axon-soma communication in the injured nerve and shed light on the integration of cytoplasmic and nuclear transport in all eukaryotic cells. (nature.com)
  • Progressive deficits in retrograde axon transport precede degeneration of motor axons in acrylamide neuropathy. (cdc.gov)
  • Single injection of acrylamide (1.3 mmol/kg, i.p.) inhibited retrograde axon transport of [125I]tetanus toxin in hen sensory and motor axons. (cdc.gov)
  • The inhibitory effect of acrylamide on retrograde axon transport was transient since transport deficits were not detectable 35 h after dosing. (cdc.gov)
  • Multiple doses of acrylamide (0.42 mmol/kg, i.p.) induced progressive clinical signs of acrylamide neuropathy that correlated with increasing deficits in retrograde axon transport of [125I]tetanus skin to ventral spinal cord. (cdc.gov)
  • Accumulated decrements in retrograde axon transport may be the underlying cause of degeneration of motor axons in acrylamide neuropathy in fowl. (cdc.gov)
  • In this paper, we examine Neu3 sialidase action on axonal gangliosides and resultant axon regeneration, and we assess whether these mechanisms help to explain the different regeneration capacities of CNS and PNS axons. (jneurosci.org)
  • Neuronal autophagosomes form and engulf cargos at presynaptic sites in the axon and are then transported to the soma to recycle their cargo. (bvsalud.org)
  • Brimijoin, S 1974, ' Retrograde axonal transport of dopamine β hydroxylase ', Biochemical Pharmacology , vol. 23, no. (elsevierpure.com)
  • Is there retrograde axonal transport of tetanus toxin in both alpha and beta fibres? (ox.ac.uk)
  • For successful transgene expression, viruses administered into muscle must undergo a series of processes, including host cell interaction and internalization, intracellular sorting, long-range retrograde axonal transport, endosomal liberation, and nuclear import. (frontiersin.org)
  • Locally Synthesized Phosphatidylcholine, but Not Protein, Undergoes Rapid Retrograde Axonal Transport in the Rat Sciatic Nerve. (epa.gov)
  • Retrograde axonal transport of phosphatidylcholine in the sciatic nerve has been demonstrated only after injection of lipid precursors into the cell body region. (epa.gov)
  • Therefore, this time-dependent accumulation of radiolabeled phosphatidylcholine in the ipsilateral dorsal root ganglia is most likely due to retrograde axonal transport of locally synthesized phospholipid material. (epa.gov)
  • The vast majority of axonal proteins are synthesized in the neuronal cell body and transported along axons. (wikipedia.org)
  • The slow component b, which also carries actin, are transported at a rate of 2-3 millimeters per day in retinal cell axons. (wikipedia.org)
  • We have identified two slowly moving groups of axonally transported proteins in guinea pig retinal ganglion cell axons (4). (rupress.org)
  • Our analyses of the transport kinetics of the individual polypeptides of SCa and SCb indicate that (a) the polypeptides of SCa are transported coherently in the optic axons, (b) the polypeptides of SCb are also transported coherently but completely separately from the SCa polypeptides, and (c) the polypeptides of SCa differ completely from those comprising SCb. (rupress.org)
  • Specific aims included: investigation of the time course of the development of AMS following vinblastineinduced axonal transport disruption, examination of the properties of mechanically sensitive axons and identification of the mechanically sensitive ion channels hypothesised to be responsible for AMS. (brighton.ac.uk)
  • The directed transport of ORGANELLES and molecules along nerve cell AXONS. (wakehealth.edu)
  • The major goal of the proposed research is to elucidate mechanisms that underlie transport of membranous organelles that are related to plasma membrane renewal (i.e., recycling) in axons. (grantome.com)
  • Thus, we find a specific epigenetic mechanism that regulates axonal regeneration of CNS axons, suggesting novel targets for clinical application. (nature.com)
  • We found that microglia pre-stimulated by inflammatory cytokines to produce nitric oxide (NO) and tumor necrosis factor-α (TNF-α) focally suppressed the axonal motility of labeled vesicle precursors at the point of contact between activated glia and axons, as measured using confocal microscopy of fluorescence recovery after photobleaching (FRAP). (uni-goettingen.de)
  • Furthermore, inhibition of axonal transport was dependent on phosphorylation of c-jun NH2-terminal kinase (JNK).In particular, we show that both NO and TNF-α stimulated phosphorylation of JNK in axons. (uni-goettingen.de)
  • This suggested a model where TNF-α produced by activated glial cells in inflammatory or degenerative brain diseases acts on axons by inhibition of cargo transport and dissociation kinesin motor protein from microtubules. (uni-goettingen.de)
  • The herpes simplex virus type 1 (HSV-1) envelope protein pUS9 plays an important role in virus anterograde axonal transport and spread from neuronal axons. (edu.au)
  • Using confocal microscopy and single and trichamber culture systems, we observed a reduction but not complete block in the anterograde axonal transport of capsids to distal axons as well as a marked (similar to 90%) reduction in virus spread from axons to Vero cells with the US9 deletion viruses. (edu.au)
  • HSV-1 has evolved mechanisms for its efficient transport along sensory axons and subsequent spread from axons to epithelial cells after reactivation. (edu.au)
  • In this study, we show that deletion of the envelope protein pUS9 leads to defects in virus transport along axons (partial defect) and in virus assembly and egress from growth cones (marked defect). (edu.au)
  • An important advantage of our new analytical approach is that it can permit the characterization of neruofilament transport in mature axons for which single-neurofilament tracking is optically challenging due to the thickness or abundance of neurofilaments. (biomedcentral.com)
  • Brown A, Wang L, Jung P: Stochastic simulation of neurofilament transport in axons: the "stop-and-go" hypothesis. (biomedcentral.com)
  • Trivedi N, Jung P, Brown A: Neurofilaments switch between distinct mobile and stationary states during their transport along axons. (biomedcentral.com)
  • The role of axonal transport in the development of structural changes of axons can be examined using experimental models. (utmb.edu)
  • We have now carried out morphometric, transport and immunocytohemical studies in primart visual axons of rats exposed to CS 2 . (utmb.edu)
  • There was no detectable axonal degeneration and the cross-sectional area of axons proximal to the enlargements was decreased. (utmb.edu)
  • Fluorescent labeling techniques (e.g. fluorescence microscopy) have enabled direct visualization of transport in living neurons. (wikipedia.org)
  • During reactivation from latency, the herpes simplex virus (HSV) enters its lytic cycle, and uses anterograde transport mechanisms to migrate from dorsal root ganglia neurons to the skin or mucosa that it subsequently affects. (wikipedia.org)
  • Axonal transport of mitochondria along microtubules and F-actin in living vertebrate neurons. (rupress.org)
  • Consistent with this hypothesis, modelling neuritis in the rat causes the development of axonal mechanical sensitivity (AMS) in nociceptive neurons. (brighton.ac.uk)
  • We found that direct application of either TNF-α or a short-term NO donor to cultured hippocampal neurons inhibited axonal motility of both synaptophysin-EGFP and synaptotagmin-EGFP. (uni-goettingen.de)
  • Confocal microscopy and lifetime-based Förster resonance energy transfer (FRET) analysis were performed on primary cultured neurons to analyse the effect of TNF-α on the axonal mitochondrial transport system. (uni-goettingen.de)
  • We devised a fluorescent imaging agent based on the non-toxic C fragment of tetanus toxin (TTc), which is taken up and transported in neurons using the highly conserved fast axonal transport mechanism. (arizona.edu)
  • Neurons require specialized mechanisms of motor-facilitated signal transport for communication along long axonal distances to the cell body and the nucleus. (nature.com)
  • These findings highlight the complex coordination of motor regulation during organelle transport in neurons. (bvsalud.org)
  • We find that increased phosphorylation of RAB3A, a cardinal synaptic vesicle precursor (SVP) protein, disrupts anterograde axonal transport of SVPs in iPSC-derived human neurons (iNeurons) expressing hyperactive LRRK2-p.R1441H. (bvsalud.org)
  • This massive process of neuronal death has been ascribed mainly to the interruption of a trophic factor supply from target structures rather than to the axonal damage per se. (nih.gov)
  • 157PubMedCrossRefGoogle ScholarDreachslin JL( 1999) book Axonal Transport in Neuronal rating and key conference: story campaigns for book planes ia. (eiltransporte.de)
  • upload that book Axonal Transport in Neuronal Growth and Regeneration sets clearly mobile in number foo: When highlighting a context, we Please not Ensure to contain the 2015uploaded Collection of the allies rotating Disallowed nor are you want to find about our history going with institutional recordings of first patterns. (eiltransporte.de)
  • Transport-related imaging findings were dramatically different between normal and retinopathic eyes prior to presumed neuronal cell death. (arizona.edu)
  • Given the fundamental importance of axonal transport to neuronal function, these observations may (at least in part) explain some of the long term neurological deficits that have been observed in humans who have been repeatedly exposed to doses of OPs not associated with acute toxicity. (elsevierpure.com)
  • In the late 1960s, neurophysiologic testing allowed the classification of CMT into 2 groups, one with slow nerve conduction velocities and histologic features of a hypertrophic demyelinating neuropathy (hereditary motor and sensory neuropathy type 1 or CMT1) and another with relatively normal velocities and axonal and neuronal degeneration (hereditary motor and sensory neuropathy type 2 or CMT2). (medscape.com)
  • Brown A, Jung P: A critical reevaluation of the stationary axonal cytoskeleton hypothesis. (biomedcentral.com)
  • The type of transport alteration produced by CS 2 and 2,5-HD is best explained by a direct effect of these compounds on the axonal cytoskeleton. (utmb.edu)
  • The findings that 2,5-HD and CS 2 , which have different chemical properties, produce almost identical changes in slow transport indicates that despite their chemical difference, these two compounds alter the axonal cytoskeleton in a similar way. (utmb.edu)
  • The main aim of this study was to investigate the role of axonal transport disruption in the development of AMS. (brighton.ac.uk)
  • In summary, data from this study supports the role of axonal transport disruption in the development of AMS and strongly infers that mechanically sensitive ion channels contribute towards AMS. (brighton.ac.uk)
  • There are two classes of slow anterograde transport: slow component a (SCa) that carries mainly microtubules and neurofilaments at 0.1-1 millimeters per day, and slow component b (SCb) that carries over 200 diverse proteins and actin at a rate of up to 6 millimeters per day. (wikipedia.org)
  • We dissected the transport of the synaptic vesicle precursor proteins synaptophysin and synaptotagmin tagged with green fluorescent protein (synaptophysin-EGFP and synaptotagmin-EGFP). (uni-goettingen.de)
  • Thus, overt production of inflammatory mediators by activated microglial cells blocks the motility of synaptic vesicle precursors and mitochondria via phosphorlyation of JNK and may cause axonal and synaptic dysfunction in inflammatory and degenerative brain diseases. (uni-goettingen.de)
  • The C. elegans counterpart of this gene is found to regulate synaptic vesicle transport, possibly by integrating JNK signaling and kinesin-1 transport. (wikipedia.org)
  • Breakdown of axonal synaptic vesicle precursor transport by microglial nitric oxide. (mpg.de)
  • To examine the contribution of axonal transport to the development of AMS in the absence of inflammation, low doses of vinblastine (0.1mM) can be applied to the rat sciatic nerve. (brighton.ac.uk)
  • However, even for CMT1 a heated debate has focused on the relative contribution of axonal versus demyelinative damage to the disease manifestations and progression. (medscape.com)
  • The movement of soluble (cytosolic) cargoes is more complex, but appears to have a similar basis where soluble proteins organize into multi-protein complexes that are then conveyed by transient interactions with more rapidly moving cargoes moving in fast axonal transport. (wikipedia.org)
  • We illuminate a possible explanatory pathophysiologic mechanism for retinal cellular neuropathy by means of a novel diagnostic method using ophthalmoscopic imaging and a molecular imaging agent targeted to fast axonal transport. (arizona.edu)
  • Vesicular cargoes move relatively fast (50-400 mm/day) whereas transport of soluble (cytosolic) and cytoskeletal proteins takes much longer (moving at less than 8 mm/day). (wikipedia.org)
  • In my laboratory researchers are examining the roles played by axonal cytoskeletal proteins in nervous system development, and in the etiology of Alzheimer's and other related neurodegenerative diseases. (uml.edu)
  • As a positive control for axonal transport deficits, initial studies were conducted with the tropolone alkaloid colchicine administered by intravitreal injection. (elsevierpure.com)
  • Millecamps, S. & Julien, J. P. Axonal transport deficits and neurodegenerative diseases. (nature.com)
  • Recent evidence suggests that the early calcium wave elicited by an axonal injury induces epigenetic changes in the nucleus, thereby priming the system for subsequent transcriptional events. (nature.com)
  • A cargo-receptor for anterograde transport motors, the kinesins, has been identified as the amyloid precursor protein (APP), the parent protein that produces the senile plaques found in Alzheimer's disease. (wikipedia.org)
  • Thus, the subaxolemmal space may represent a special transport pathway for precursor plasmalemma. (grantome.com)
  • The radioactivity in the water-soluble fraction did not show a time-dependent accumulation in the ipsilateral dorsal root ganglia as compared with the contralateral DRGs, ruling out transport or diffusion of precursor molecules. (epa.gov)
  • We conclude that the rapid degeneration of RGCs after axotomy can be ascribed only partly to the loss of retrogradely transported trophic factors. (nih.gov)
  • Axonal degeneration is a prediction of disability. (medscape.com)
  • The other slowly transported group of proteins, designated slow components b (SCb), has a transport rate of 2-3 mm/d and consists of many polypeptides, one of which is actin (4). (rupress.org)
  • The central hypotheses that serve as rationales for the project are that a spectrin-actin and/or a myosin-actin cytoskeletal system(s) is/are involved in the 'packaging' and/or transport of cytomembranes targeted for recycling of the axolemma. (grantome.com)
  • Actin, spectrin, putative myosin and calmodulin are concentrated in these motile structures, and are co-transported with the contents of the varicosities and inclusions. (grantome.com)
  • Considering filament polymerization requires ATP, inhibition of glycolysis results in a paradoxical increase in axonal actin filament levels. (jneurosci.org)
  • Motor proteins bind and transport several different cargoes including mitochondria, cytoskeletal polymers, autophagosomes, and synaptic vesicles containing neurotransmitters. (wikipedia.org)
  • The slowest group of proteins, designated slow component a (SCa), has a transport rate of 0.25 mm/d and consists of tubulin and neurofilament protein. (rupress.org)
  • Furthermore, it is proposed that SCa corresponds to the microtubule-neurofilament network, and that SCb represents the transport of the microfilament network together with the proteins complexed with microfilaments. (rupress.org)
  • In these tubules, proteins are synthesized, folded, modified by the addition of sugars, and packaged for transport to their final destination. (alzforum.org)
  • There is also traffic in the opposite direction: molecules are transported into the cell from outside, including worn-out or excess receptor and channel proteins from the outside of the cell membrane. (alzforum.org)
  • Jung P, Brown A: Modeling the slowing of neurofilament transport along the mouse sciatic nerve. (biomedcentral.com)
  • Axonal transport occurs throughout the life of a neuron and is essential to its growth and survival. (wikipedia.org)
  • This motility is involved in basic cellular processes such as organelle trafficking, and in more specialized functions such as the transport of vesicles along the extended axonal processes of the neuron. (nih.gov)
  • Studies in kinesin-light chain-1 knockout mice revealed that Mn2+ travels by kinesin-based transport in the optic nerve and in the brain. (wikipedia.org)
  • To distinguish between these two possibilities, we induced a reversible axonal transport blockade in the developing optic nerve by topical application of a local anesthetic (lidocaine). (nih.gov)
  • In the study described here we evaluated the effects of the commonly used OP-pesticide, chlorpyrifos (CPF) on axonal transport in the brains of living rats using manganese (Mn 2+ )-enhanced magnetic resonance imaging (MEMRI) of the optic nerve (ON) projections from the retina to the superior colliculus (SC). (elsevierpure.com)
  • As expected, intravitreal injection of colchicine (2.5μg) produced a robust decrease in transport of Mn 2+ along the optic nerve (ON) and to the superior colliculus (SC) (as indicated by the reduced MEMRI contrast). (elsevierpure.com)
  • [ 5 ] The blood supply to the optic nerve, the axonal or ganglion cell metabolism, and the lamina cribrosa extracellular matrix may play a role. (medscape.com)
  • Axonal regenerative failure is a major cause of neurological impairment following central nervous system (CNS) but not peripheral nervous system (PNS) injury. (nature.com)
  • Consistently, TNF-α induced axonal transport impairment normalized again after 6-8 hours of TNF-α application. (uni-goettingen.de)
  • TTc serves as an imaging biomarker for normal axonal transport and demonstrates impairment of axonal transport early in the course of an N-methyl-D-aspartic acid (NMDA)-induced excitotoxic retinopathy model in rats. (arizona.edu)
  • Knockdown of either protein led to disrupted spectrin motility and reduced distal MPS, and UNC-76 overexpression instructed excessive transport of spectrin. (bvsalud.org)
  • Furthermore, TNF-α inhibited axonal transport of mitochondria in a similar manner. (uni-goettingen.de)
  • Movement toward the cell body is called retrograde transport and movement toward the synapse is called anterograde transport. (wikipedia.org)
  • Manganese, a contrast agent for T1-weighted MRI, travels by anterograde transport after stereotaxic injection into the brain of experimental animals and thereby reveals circuitry by whole brain MR imaging in living animals, as pioneered by Robia Pautler, Elaine Bearer and Russ Jacobs. (wikipedia.org)
  • The anterograde transport of the transient receptor potential channels vaniloid 1 and ankyrin 1 (TPRV1 and TRPA1 respectively) and acid sensing ion channel 3 (ASIC3) were disrupted following vinblastinetreatment and neuritis. (brighton.ac.uk)
  • As dynein is a retrograde motor, its dysfunction should not directly influence anterograde transport. (asme.org)
  • These axonopathies are excellent experimental models of the giant axonal neuropathies, a group of acquired and inherited human diseases of the central and peripheral nervous system. (utmb.edu)
  • Here we show through systematic epigenetic studies that the histone acetyltransferase p300/CBP-associated factor (PCAF) promotes acetylation of histone 3 Lys 9 at the promoters of established key regeneration-associated genes following a peripheral but not a central axonal injury. (nature.com)
  • Finally, PCAF is necessary for conditioning-dependent axonal regeneration and also singularly promotes regeneration after spinal cord injury. (nature.com)
  • Identification of a specific regulatory mechanism shared by several essential genes may lead to novel molecular strategies recapitulating the conditioning effect, thus non-surgically enhancing axonal regeneration in the CNS. (nature.com)
  • Finally, we established that PCAF is required for regeneration following a conditioning lesion and PCAF overexpression promotes axonal regeneration similar to that of a conditioning lesion after CNS injury in spinal ascending sensory fibres. (nature.com)
  • Our results show the first evidence of immediate retrograde signalling leading to long-term epigenetic reprogramming of gene expression of select genes whose modulation leads to axonal regeneration in the hostile spinal environment. (nature.com)
  • Anterograde (also called "orthograde") transport is movement of molecules/organelles outward, from the cell body (also called soma) to the synapse or cell membrane. (wikipedia.org)
  • Disturbance of axonal transport and accumulation of axonally transported organelles is an early sign of neuroinflammatory diseases such as multiple sclerosis, brain injury and Alzheimer's disease. (uni-goettingen.de)
  • Impaired cellular membrane trafficking, more particularly, axonal transport of macromolecules and organelles, is the best-characterized genetic mechanism of HSP. (medscape.com)
  • Figure 2: Retrograde signalling via the JUN kinase pathway after an axonal lesion. (nature.com)
  • Axonal transport disruption is hypothesised to cause an accumulation of anterogradely transported mechanically sensitive ion channels, which are locally inserted into the axonal membrane thereby causing mechanical sensitivity. (brighton.ac.uk)
  • Mathematically speaking, to achieve a prescribed concentration at the terminal, equations governing cargo transport must allow for the imposition of a boundary condition postulating the cargo concentration at the terminal. (asme.org)
  • The protein encoded by this gene shares similarity with the product of Drosophila syd gene, required for the functional interaction of kinesin I with axonal cargo. (wikipedia.org)
  • Butowt, R, Davies, P & Brown, DR 2007, ' Anterograde axonal transport of chicken cellular prion protein (PrPc) in vivo requires its N-terminal part ', Journal of Neuroscience Research , vol. 85, no. 12, pp. 2567-2579. (bath.ac.uk)
  • transport is driven by the microtubule motor protein cytoplasmic dynein, with motor activity regulated by a sequential series of adaptors. (bvsalud.org)
  • The anterograde movement of individual cargoes (in transport vesicles) of both fast and slow components along the microtubule is mediated by kinesins. (wikipedia.org)
  • Axonal Transport" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (wakehealth.edu)
  • thus, long-distance retrograde signalling from axonal lesion sites to the soma and nucleus is required. (nature.com)
  • Either knockdown or overexpression of RAB10 stalls transport, suggesting that this GTPase is also required to coordinate the opposing activities of bound dynein and kinesin motors. (bvsalud.org)
  • Artificially linking spectrin to kinesin-1 drove robust motility but inefficient MPS assembly, whereas impairing MPS assembly led to excessive spectrin transport, suggesting a balance between transport and assembly. (bvsalud.org)
  • The dorsal root ganglia (DRG) sensory neurone system has a central as well as a peripheral axonal branch departing from a single cell body. (nature.com)
  • This suggests that, in most cases, axonal damage is the root cause of the neuropathy, not demyelination. (medscape.com)
  • In addition, we observed that extracellular signal-regulated kinase (ERK) axonal retrograde signalling is required for PCAF-dependent acetylation at these promoters and for their enhancement in gene expression. (nature.com)
  • Several kinesins have been implicated in slow transport, though the mechanism for generating the "pauses" in the transit of slow component cargoes is still unknown. (wikipedia.org)
  • Importins associated with dynein are an important component of retrograde injury signalling complexes and enable transport of direct importin cargoes, such as transcription factors, as well as secondary cargoes that bind scaffolding molecules associated with importins. (nature.com)
  • Brown A: Axonal transport of membraneous and nonmembranous cargoes: a unified perspective. (biomedcentral.com)
  • The regenerative response initiated following axonal injury in the peripheral nervous system (PNS) versus the central nervous system (CNS) leads to differential growth capacities and repair. (nature.com)
  • and (4) exploring the link between defects in axonal transport and the development of neuropathogenesis in degenerative diseases such as ALS. (nih.gov)