Refsum Disease
Phytanic Acid
Refsum Disease, Infantile
Peroxisomal Disorders
Phytol
Zellweger Syndrome
Microbodies
Coenzyme A
Mixed Function Oxygenases
Peroxisomes
Encephalitis, St. Louis
Genetics
Encephalitis Virus, St. Louis
Individualized Medicine
Molecular Medicine
Peroxisome biogenesis disorders. (1/3)
Defects in PEX genes impair peroxisome assembly and multiple metabolic pathways confined to this organelle, thus providing the biochemical and molecular bases of the peroxisome biogenesis disorders (PBD). PBD are divided into two types--Zellweger syndrome spectrum (ZSS) and rhizomelic chondrodysplasia punctata (RCDP). Biochemical studies performed in blood and urine are used to screen for the PBD. DNA testing is possible for all of the disorders, but is more challenging for the ZSS since 12 PEX genes are known to be associated with this spectrum of PBD. In contrast, PBD-RCDP is associated with defects in the PEX7 gene alone. Studies of the cellular and molecular defects in PBD patients have contributed significantly to our understanding of the role of each PEX gene in peroxisome assembly. (+info)Docosahexaenoic acid therapy in peroxisomal diseases: results of a double-blind, randomized trial. (2/3)
(+info)The Delta4-desaturation pathway for DHA biosynthesis is operative in the human species: differences between normal controls and children with the Zellweger syndrome. (3/3)
(+info)Refsum Disease is a rare inherited neurological disorder characterized by the accumulation of phytanic acid in various tissues of the body due to impaired breakdown of this fatty acid. This is caused by a deficiency in the enzyme phytanoyl-CoA hydroxylase or the transporter protein peroxisomal biogenesis factor 7 (PEX7).
The symptoms of Refsum Disease can vary but often include progressive neurological dysfunction, retinitis pigmentosa leading to decreased vision and night blindness, hearing loss, ichthyosis (dry, scaly skin), and cardiac abnormalities. The onset of symptoms is usually in childhood or adolescence, but milder cases may not become apparent until later in life.
The treatment for Refsum Disease involves a strict diet that limits the intake of phytanic acid, which is found in dairy products, beef, and certain fish. Plasmapheresis, a procedure to remove harmful substances from the blood, may also be used to reduce the levels of phytanic acid in the body. Early diagnosis and treatment can help slow down or prevent the progression of the disease.
Phytanic acid is a branched-chain fatty acid that is primarily found in animal products, such as dairy foods and meat, but can also be present in some plants. It is a secondary plant metabolite that originates from the breakdown of phytol, a component of chlorophyll.
Phytanic acid is unique because it contains a methyl group branching off from the middle of the carbon chain, making it difficult for the body to break down and metabolize. Instead, it must be degraded through a process called α-oxidation, which takes place in peroxisomes.
In some cases, impaired phytanic acid metabolism can lead to a rare genetic disorder known as Refsum disease, which is characterized by the accumulation of phytanic acid in various tissues and organs, leading to neurological symptoms, retinal degeneration, and cardiac dysfunction.
Infantile Refsum Disease (IRD) is a rare inherited neurological disorder that is part of the group of peroxisomal biogenesis disorders. It is caused by mutations in the PHYH gene, which provides instructions for making an enzyme called phytanoyl-CoA hydroxylase. This enzyme plays a critical role in breaking down a type of fat called phytanic acid, which is found in certain foods such as dairy products, ruminant meat (beef, lamb), and some nuts and vegetables.
In IRD, the lack of functional phytanoyl-CoA hydroxylase enzyme leads to an accumulation of phytanic acid in various tissues of the body, including the nervous system. This accumulation can cause progressive neurological symptoms such as difficulty with coordination and movement, muscle weakness, hearing loss, vision problems, and intellectual disability.
IRD typically presents in infancy or early childhood with symptoms such as feeding difficulties, failure to thrive, hypotonia (low muscle tone), seizures, and developmental delays. Over time, the neurological symptoms can worsen, leading to significant disability and reduced life expectancy. Treatment for IRD involves a strict diet that limits the intake of phytanic acid, as well as plasma exchange therapy to remove excess phytanic acid from the bloodstream.
Peroxisomal disorders are a group of inherited metabolic diseases caused by defects in the function or structure of peroxisomes, which are specialized subcellular organelles found in the cells of animals, plants, and humans. These disorders can affect various aspects of metabolism, including fatty acid oxidation, bile acid synthesis, and plasma cholesterol levels.
Peroxisomal disorders can be classified into two main categories: single peroxisomal enzyme deficiencies and peroxisome biogenesis disorders (PBDs). Single peroxisomal enzyme deficiencies are characterized by a defect in a specific enzyme found within the peroxisome, while PBDs are caused by problems with the formation or assembly of the peroxisome itself.
Examples of single peroxisomal enzyme deficiencies include X-linked adrenoleukodystrophy (X-ALD), Refsum disease, and acyl-CoA oxidase deficiency. PBDs include Zellweger spectrum disorders, such as Zellweger syndrome, neonatal adrenoleukodystrophy, and infantile Refsum disease.
Symptoms of peroxisomal disorders can vary widely depending on the specific disorder and the severity of the enzyme or biogenesis defect. They may include neurological problems, vision and hearing loss, developmental delays, liver dysfunction, and skeletal abnormalities. Treatment typically focuses on managing symptoms and addressing any underlying metabolic imbalances.
Phytol is not a medical term, but rather a chemical compound. It is a diterpene alcohol that is a breakdown product of chlorophyll and is found in green plants. It is used in the synthesis of various compounds, including vitamins E and K, and is also used in the production of perfumes and fragrances. In the context of human health, phytol has been studied for its potential anti-cancer properties.
Zellweger Syndrome is a rare genetic disorder that affects the development and function of multiple organ systems in the body. It is part of a group of conditions known as peroxisome biogenesis disorders (PBDs), which are characterized by abnormalities in the structure and function of peroxisomes, which are cellular structures that break down fatty acids and other substances in the body.
Zellweger Syndrome is caused by mutations in one or more genes involved in the formation and maintenance of peroxisomes. As a result, people with this condition have reduced levels of certain enzymes that are necessary for normal brain development, as well as for the breakdown of fats and other substances in the body.
Symptoms of Zellweger Syndrome typically appear within the first few months of life and may include:
* Severe developmental delays and intellectual disability
* Hypotonia (low muscle tone) and poor motor skills
* Vision and hearing problems
* Facial abnormalities, such as a high forehead, wide-set eyes, and a prominent nasal bridge
* Liver dysfunction and jaundice
* Seizures
* Feeding difficulties and failure to thrive
There is no cure for Zellweger Syndrome, and treatment is focused on managing the symptoms of the condition. The prognosis for people with this disorder is generally poor, with most individuals not surviving beyond the first year of life. However, some individuals with milder forms of the condition may live into early childhood or adolescence.
Microbodies are small, membrane-bound organelles found in the cells of eukaryotic organisms. They typically measure between 0.2 to 0.5 micrometers in diameter and play a crucial role in various metabolic processes, particularly in the detoxification of harmful substances and the synthesis of lipids.
There are several types of microbodies, including:
1. Peroxisomes: These are the most common type of microbody. They contain enzymes that help break down fatty acids and amino acids, producing hydrogen peroxide as a byproduct. Another set of enzymes within peroxisomes then converts the harmful hydrogen peroxide into water and oxygen, thus detoxifying the cell.
2. Glyoxysomes: These microbodies are primarily found in plants and some fungi. They contain enzymes involved in the glyoxylate cycle, a metabolic pathway that helps convert stored fats into carbohydrates during germination.
3. Microbody-like particles (MLPs): These are smaller organelles found in certain protists and algae. Their functions are not well understood but are believed to be involved in lipid metabolism.
It is important to note that microbodies do not have a uniform structure or function across all eukaryotic cells, and their specific roles can vary depending on the organism and cell type.
Coenzyme A, often abbreviated as CoA or sometimes holo-CoA, is a coenzyme that plays a crucial role in several important chemical reactions in the body, particularly in the metabolism of carbohydrates, fatty acids, and amino acids. It is composed of a pantothenic acid (vitamin B5) derivative called pantothenate, an adenosine diphosphate (ADP) molecule, and a terminal phosphate group.
Coenzyme A functions as a carrier molecule for acetyl groups, which are formed during the breakdown of carbohydrates, fatty acids, and some amino acids. The acetyl group is attached to the sulfur atom in CoA, forming acetyl-CoA, which can then be used as a building block for various biochemical pathways, such as the citric acid cycle (Krebs cycle) and fatty acid synthesis.
In summary, Coenzyme A is a vital coenzyme that helps facilitate essential metabolic processes by carrying and transferring acetyl groups in the body.
Mixed Function Oxygenases (MFOs) are a type of enzyme that catalyze the addition of one atom each from molecular oxygen (O2) to a substrate, while reducing the other oxygen atom to water. These enzymes play a crucial role in the metabolism of various endogenous and exogenous compounds, including drugs, carcinogens, and environmental pollutants.
MFOs are primarily located in the endoplasmic reticulum of cells and consist of two subunits: a flavoprotein component that contains FAD or FMN as a cofactor, and an iron-containing heme protein. The most well-known example of MFO is cytochrome P450, which is involved in the oxidation of xenobiotics and endogenous compounds such as steroids, fatty acids, and vitamins.
MFOs can catalyze a variety of reactions, including hydroxylation, epoxidation, dealkylation, and deamination, among others. These reactions often lead to the activation or detoxification of xenobiotics, making MFOs an important component of the body's defense system against foreign substances. However, in some cases, these reactions can also produce reactive intermediates that may cause toxicity or contribute to the development of diseases such as cancer.
Peroxisomes are membrane-bound subcellular organelles found in the cytoplasm of eukaryotic cells. They play a crucial role in various cellular processes, including the breakdown of fatty acids and the detoxification of harmful substances such as hydrogen peroxide (H2O2). Peroxisomes contain numerous enzymes, including catalase, which converts H2O2 into water and oxygen, thus preventing oxidative damage to cellular components. They also participate in the biosynthesis of ether phospholipids, a type of lipid essential for the structure and function of cell membranes. Additionally, peroxisomes are involved in the metabolism of reactive oxygen species (ROS) and contribute to the regulation of intracellular redox homeostasis. Dysfunction or impairment of peroxisome function has been linked to several diseases, including neurological disorders, developmental abnormalities, and metabolic conditions.
St. Louis Encephalitis (SLE) is a type of viral brain inflammation caused by the St. Louis Encephalitis virus. It is transmitted to humans through the bite of infected mosquitoes, primarily Culex species. The virus breeds in warm, stagnant water and is more prevalent in rural and suburban areas.
Most people infected with SLE virus do not develop symptoms or only experience mild flu-like illness. However, some individuals, particularly the elderly, can develop severe illness characterized by sudden onset of fever, headache, neck stiffness, disorientation, coma, seizures, and spastic paralysis. There is no specific treatment for SLE, and management is focused on supportive care, including hydration, respiratory support, and prevention of secondary infections. Vaccination against SLE is not available, and prevention measures include using insect repellent, wearing protective clothing, and eliminating standing water around homes to reduce mosquito breeding sites.
Genetics is the scientific study of genes, heredity, and variation in living organisms. It involves the analysis of how traits are passed from parents to offspring, the function of genes, and the way genetic information is transmitted and expressed within an organism's biological system. Genetics encompasses various subfields, including molecular genetics, population genetics, quantitative genetics, and genomics, which investigate gene structure, function, distribution, and evolution in different organisms. The knowledge gained from genetics research has significant implications for understanding human health and disease, as well as for developing medical treatments and interventions based on genetic information.
St. Louis Encephalitis Virus (SLEV) is a type of arbovirus (arthropod-borne virus) from the family Flaviviridae and genus Flavivirus. It is the causative agent of St. Louis encephalitis (SLE), a viral disease characterized by inflammation of the brain (encephalitis). The virus is primarily transmitted to humans through the bite of infected mosquitoes, particularly Culex spp.
The SLEV infection in humans is often asymptomatic or may cause mild flu-like symptoms such as fever, headache, nausea, and vomiting. However, in some cases, the virus can invade the central nervous system, leading to severe neurological manifestations like meningitis, encephalitis, seizures, and even coma or death. The risk of severe disease increases in older adults and people with weakened immune systems.
There is no specific antiviral treatment for SLE; management typically focuses on supportive care to alleviate symptoms and address complications. Prevention measures include avoiding mosquito bites, using insect repellents, and eliminating breeding sites for mosquitoes. Vaccines are not available for SLEV, but they have been developed and tested in the past, with potential for future use in high-risk populations during outbreaks.
Individualized medicine, also known as personalized medicine, is a medical model that uses molecular profiling and various diagnostic tests to understand the genetic and environmental variations affecting an individual's health and disease susceptibility. It aims to tailor medical treatments, including prevention strategies, diagnostics, therapies, and follow-up care, to each person's unique needs and characteristics. By incorporating genomic, proteomic, metabolomic, and other "omics" data into clinical decision-making, individualized medicine strives to improve patient outcomes, reduce adverse effects, and potentially lower healthcare costs.
Genomics is the scientific study of genes and their functions. It involves the sequencing and analysis of an organism's genome, which is its complete set of DNA, including all of its genes. Genomics also includes the study of how genes interact with each other and with the environment. This field of study can provide important insights into the genetic basis of diseases and can lead to the development of new diagnostic tools and treatments.
Molecular medicine is a branch of medicine that uses molecular biology and genetics to understand, diagnose, and treat various diseases and disorders. It involves the study of biological molecules such as DNA, RNA, proteins, and lipids to identify abnormalities at the molecular level that can lead to disease. This information is then used to develop targeted therapies that can specifically address these molecular targets, with the goal of improving patient outcomes while minimizing side effects. Molecular medicine also encompasses the use of genetic testing and personalized medicine, which tailors treatments to an individual's specific genetic makeup.
Medical genetics is the branch of medicine that involves the study of inherited conditions and diseases, as well as the way they are passed down through families. It combines elements of clinical evaluation, laboratory testing, and genetic counseling to help diagnose, manage, and prevent genetic disorders. Medical genetics also includes the study of genetic variation and its role in contributing to both rare and common diseases. Additionally, it encompasses the use of genetic information for pharmacological decision making (pharmacogenomics) and reproductive decision making (preimplantation genetic diagnosis, prenatal testing).
Infantile Refsum disease
Zellweger syndrome
Peroxisomal biogenesis factor 2
Peroxisomal disorder
Zellweger spectrum disorders
PEX6
PEX1
List of diseases (R)
Pipecolic acidemia
Refsum disease
Autosomal recessive cerebellar ataxia
Glossary of medicine
List of OMIM disorder codes
List of ICD-9 codes 320-389: diseases of the nervous system and sense organs
List of MeSH codes (C10)
List of neurological conditions and disorders
List of skin conditions
Infantile Refsum disease - Wikipedia
Refsum Disease: Practice Essentials, Background, Pathophysiology
Refsum Disease: Practice Essentials, Background, Pathophysiology
Adult onset seizures in learning disability | Royal College of Physicians of Edinburgh
Peroxisomal Disorders - Children's Health Issues - MSD Manual Consumer Version
PEDIATRIC NEURORADIOLOGY | American Journal of Neuroradiology
JCI - Usage information: Animal cell mutants represent two complementation groups of peroxisome-defective Zellweger syndrome.
International Classification of Diseases - Endocrine, Nutritional and Metabolic Diseases, and Immunity Disorders
Complementation analysis in patients with the clinical phenotype of a generalised peroxisomal disorder. | Journal of Medical...
Zellweger Syndrome
PEX1 Antibody (NBP1-80577): Novus Biologicals
hypotony | Hereditary Ocular Diseases
MeSH Browser
Plasma and red blood cell fatty acids in peroxisomal disorders<...
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Refsum Disease Medication: Keratolytics
Refsum Disease: Background, Pathophysiology, Epidemiology
June | 2022 | Strive For Good Health
Conditions related to
Refsum Disease - Causes, Pathophysiology and Complications
Refsum Syndrome | Syndromes: Rapid Recognition and Perioperative Implications, 2e | AccessAnesthesiology | McGraw Hill Medical
Genetics and Genomic Medicine | St. Louis Children's Hospital
Zellweger Syndrome Disease: Causes, Symptoms, Diagnosis, Treatment
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PEX1 antibodies | Antibodypedia
"Motor axonal neuropathy"[Clinical Features] OR 413108[uid] - MedGen -...
"Brain atrophy"[Clinical Features] OR 1643639[uid] - MedGen -...
Neonatal adrenoleukodystrophy6
- Generalized peroxisome-deficient disorders including cerebro-hepato-renal Zellweger syndrome, neonatal adrenoleukodystrophy, and infantile Refsum disease are autosomal recessive diseases, where catalase-containing particles (peroxisomes) are morphologically absent. (jci.org)
- Other peroxisome biogenesis disorders are Infantile Refsum disease, neonatal adrenoleukodystrophy and rhizomelic chondrodysplasia. (healthcaremagic.com)
- We report the levels of 62 fatty acids and plasmalogens in patients with X- linked adrenoleukodystrophy (X-ALD), Zellweger syndrome (ZS), neonatal adrenoleukodystrophy (NALD), and infantile Refsum disease (IRD), both at baseline and after dietary interventions. (psu.edu)
- Mutations in this gene have been associated with complementation group 1 peroxisomal disorders such as neonatal adrenoleukodystrophy, infantile Refsum disease, and Zellweger syndrome. (antibodypedia.com)
- Preliminary evidence suggests that people with a variety of rare but related congenital diseases (Zellweger's syndrome, neonatal adrenoleukodystrophy, and infantile Refsum's disease) may be DHA-deficient, and may even benefit from DHA supplementation. (eurovital.com)
- Although they share a similar name, X-linked ALD and neonatal adrenoleukodystrophy (NALD), a peroxisome biogenesis disorder, are completely different diseases. (findmeacure.com)
Zellweger5
- Infantile Refsum disease (IRD) is a rare autosomal recessive congenital peroxisomal biogenesis disorder within the Zellweger spectrum. (wikipedia.org)
- Infantile Refsum disease is one of three peroxisome biogenesis disorders which belong to the Zellweger spectrum of peroxisome biogenesis disorders (PBD-ZSD). (wikipedia.org)
- Although they share a similar molecular basis for disease, Infantile Refsum disease is less severe than Zellweger syndrome. (wikipedia.org)
- Infantile Refsum's disease is a peroxisome biogenesis disorder that falls within the Zellweger disorder spectrum, sharing similar clinical and biochemical features but the clinical picture is less severe such that some patients survive to adulthood. (rcpe.ac.uk)
- The generalised peroxisomal disorders (GPDs) Zellweger syndrome (ZS), neonatal adrenoleucodystrophy (NALD), and infantile Refsum's disease (IRD) are autosomal recessive disorders associated with a failure to assemble mature peroxisomes. (bmj.com)
Biogenesis5
- Late onset white matter disease in peroxisome biogenesis disorder. (rcpe.ac.uk)
- Refsum disease can be classified as a peroxisome biogenesis disorder. (medscape.com)
- [ 1 ] Infantile Refsum disease is a peroxisome biogenesis disorder. (medscape.com)
- An infantile form of Refsum disease also exists and is an autosomal recessive disorder of peroxisomal biogenesis, leading to many biochemical abnormalities, including elevated plasma concentration of phytanic acid, pristanic acid, very long chain fatty acids, and C27 bile acids. (medscape.com)
- These diseases affect peroxisomes and are also called peroxisomal biogenesis disorders. (askapollo.com)
Mouse model for Refsum disease2
- Ataxia with loss of Purkinje cells in a mouse model for Refsum disease. (medscape.com)
- Recently, a mouse model for Refsum disease ( Phyh knockout mouse by targeted disruption of the PHYH gene). (medscape.com)
Disorder10
- Infantile Refsum disease is a developmental brain disorder. (wikipedia.org)
- Infantile Refsum disease is an autosomal recessive disorder caused by mutations in genes that encode peroxins, proteins required for normal peroxisome assembly. (wikipedia.org)
- The cause of his learning disability was uncertain but a peroxisomal disorder, possibly infantile Refsum's disease, had been suspected because of early onset blindness although metabolic investigations in childhood had been nondiagnostic. (rcpe.ac.uk)
- Fiskerstrand T, Knappskog P, Majewski J, Wanders RJ, Boman H, Bindoff LA. A novel Refsum-like disorder that maps to chromosome 20. (medscape.com)
- Refsum disease is a recessive disorder characterized by defective peroxisomal alpha-oxidation of phytanic acid. (medscape.com)
- Refsum disease is a genetic disorder that affects the metabolism of the fatty acid phytanic acid. (diseasesdic.com)
- Hence, they concluded that Refsum disease is a true peroxisomal disorder type, unlike other variants. (diseasesdic.com)
- The classic giant axonal neuropathy phenotype typically manifests as an infantile-onset neurodegenerative disorder, starting as a severe peripheral motor and sensory neuropathy and evolving into central nervous system impairment (intellectual disability, seizures, cerebellar signs, and pyramidal tract signs). (beds.ac.uk)
- X-linked recessive Charcot-Marie-Tooth disease-4 with or without cerebellar ataxia (CMTX4) is a mitochondrial disorder manifest as progressive neurologic dysfunction with highly variable features. (beds.ac.uk)
- FBN1-related Marfan syndrome (Marfan syndrome), a systemic disorder of connective tissue with a high degree of clinical variability, comprises a broad phenotypic continuum ranging from mild (features of Marfan syndrome in one or a few systems) to severe and rapidly progressive neonatal multiorgan disease. (nih.gov)
Combination docosahexaenoic acid and cholic acid2
- A phytanic acid-restricted diet and combination docosahexaenoic acid and cholic acid therapy may inhibit disease progression. (medscape.com)
- Ophthalmic Diagnosis and Novel Management of Infantile Refsum Disease with Combination Docosahexaenoic Acid and Cholic Acid. (nih.gov)
Phytanic Acid Storage Disease2
- An early onset form of phytanic acid storage disease with clinical and biochemical signs different from those of REFSUM DISEASE . (nih.gov)
- Then, on July 7, , the nation's 9th president was buried in a family tomb at the summit of Mt. Infantile phytanic acid storage disease, a possible variant hunt showdown aim lock Refsum's disease: Three cases, including ultrastructural studies of the liver. (aeemployment.com)
Syndrome5
- Currently, there is no cure for infantile Refsum disease syndrome, nor is there a standard course of treatment. (wikipedia.org)
- Refsum disease (RD) is a neurocutaneous syndrome that is characterized biochemically by the accumulation of phytanic acid in plasma and tissues. (medscape.com)
- The Norwegian neurologist Sigvald B. Refsum (1907-1991) described this syndrome in 1945. (mhmedical.com)
- Triple A syndrome is an inherited condition characterized by three specific features: achalasia, Addison disease, and alacrima. (beds.ac.uk)
- When your patients are looking to understand if they are a carrier for specific genetic conditions like cystic fibrosis, spinal muscular atrophy, fragile X syndrome, or Tay-Sachs disease, appropriate genetic screening and actionable results are essential . (questwomenshealth.com)
Phytanoyl-CoA hydroxy6
- Refsum disease is caused by mutations in the phytanoyl-CoA hydroxylase gene. (medscape.com)
- Foulon V, Asselberghs S, Geens W, Mannaerts GP, Casteels M, Van Veldhoven PP. Further studies on the substrate spectrum of phytanoyl-CoA hydroxylase: implications for Refsum disease? (medscape.com)
- Molecular basis of Refsum disease: sequence variations in phytanoyl-CoA hydroxylase (PHYH) and the PTS2 receptor (PEX7). (medscape.com)
- Patients with Refsum disease are unable to degrade phytanic acid because of a deficient activity of phytanoyl-CoA hydroxylase (PhyH), a peroxisomal enzyme catalyzing the first step of phytanic acid alpha-oxidation. (medscape.com)
- [ 7 ] A Refsum disease gene, phytanoyl-CoA hydroxylase ( PHYH ), has been localized to band 10p13 between the markers D10S226 and D10S223. (medscape.com)
- Refsum disease (adults form) is caused by mutations in the gene encoding phytanoyl-CoA hydroxylase (PHYH) on 10p13 resulting in accumulation of exogenous phytanic acid (milk, fat of cows and sheep) in blood plasma and tissues. (mhmedical.com)
Onset5
- However, a patient was described with rare late-onset adult disease first evident at age 72 years. (diseasesdic.com)
- With age, children with neonatal/infantile-onset Canavan disease often become irritable and experience sleep disturbance, seizures, and feeding difficulties. (nih.gov)
- The disease progresses slowly following the onset of neurologic symptoms. (nih.gov)
- They have distinctive facies, congenital malformations (neuronal migration defects associated with neonatal-onset seizures, renal cysts, and bony stippling [chondrodysplasia punctata] of the patella[e] and the long bones), and liver disease that can be severe. (beds.ac.uk)
- Typically, a predilection exists for distal limbs as the site of disease onset and more severe symptoms and signs. (medscape.com)
Peroxisomes3
- Peroxisomal disorders are a group of genetically heterogeneous metabolic diseases that share dysfunction of peroxisomes. (healthcaremagic.com)
- Singh I, Pahan K, Singh AK, Barbosa E. Refsum disease: a defect in the alpha-oxidation of phytanic acid in peroxisomes. (medscape.com)
- Mutant forms of phytanoyl-CoA 2-hydroxylase (PHYH) which plays a key role of phytanic acid alpha-oxidation in peroxisomes have been shown to be responsible for some, but not all, cases of Refsum's disease. (diseasesdic.com)
Adult5
- IRD is associated with deficient phytanic acid catabolism, as is adult Refsum disease, but they are different disorders that should not be confused. (wikipedia.org)
- Phenotype of adult Refsum disease due to a defect in peroxin 7. (medscape.com)
- Based on the above, it was proposed that adult Refsum disease could be divided into types 1 and 2, depending on which gene is defective. (medscape.com)
- Phytanic Acid Intake and Lifestyle Modifications on Quality of Life in Individuals with Adult Refsum Disease: A Retrospective Survey Analysis. (nih.gov)
- This is an observational registry database for adult patients diagnosed with degenerative spine disorders, which aims to add information to the understanding of the disease management of this spine diseases. (umn.edu)
OMIM1
- Online Mendelian Inheritance in Man (OMIM): Refsum Disease, Classic - 266500 Steinberg, S. (wikipedia.org)
Metabolic2
- The aim of this programme is to screen all babies born in Singapore for metabolic and heritable diseases. (kkh.com.sg)
- Although metabolic diseases are rare individually, cumulatively, the incidence rate may be as high as 1:3,000-3,500 in some categories of metabolic diseases. (kkh.com.sg)
Disorders5
- citation needed] In addition to genetic tests involving PEX genes, biochemical tests have proven highly effective for the diagnosis of infantile Refsum disease and other peroxisomal disorders. (wikipedia.org)
- Of all the above mentioned peroxisomal disorders infantile Refsum disease is the least severe form of the disease. (healthcaremagic.com)
- Refsum's disease revealed by cardiac disorders. (medscape.com)
- These disorders are now classified as different expressions (variants) of one disease process. (cancerhealthcenter.com)
- ALD is a disease in a group of genetic disorders called leukodystrophies. (findmeacure.com)
PHYH1
- In 90% of the cases, Refsum disease is due to a mutation in the PHYH gene (in chromosome 10). (diseasesdic.com)
Refsum's Disease5
- Owing to the uncertainty about the underlying diagnosis, and because seizures do not appear to be a typical clinical feature in infantile Refsum's disease, 1,2 further investigation was indicated. (rcpe.ac.uk)
- A, p.Gly843Asp, and c.2916delA, p.Gly973AlafsTer16, confirming the diagnosis of infantile Refsum's disease. (rcpe.ac.uk)
- The MR imaging changes seen in our patient were those typically reported in infantile Refsum's disease, namely symmetrical high signal change in periventricular white matter with sparing of subcortical U fibres and pronounced central cerebellar demyelination. (rcpe.ac.uk)
- 6 The imaging changes in our patient were not as florid as reported in some childhood cases, perhaps associated with his long survival, but nevertheless contributed to establishing the diagnosis of infantile Refsum's disease prior to confirmation by genetic testing. (rcpe.ac.uk)
- Conventional and advanced MR imaging in infantile Refsum's disease. (rcpe.ac.uk)
Phenotype1
- In this chapter, the term "classic CARASIL" refers to the more severe phenotype associated with biallelic pathogenic variants, and "HTRA1 cerebral small vessel disease" (HTRA1-CSVD) refers to the milder phenotype associated with a heterozygous HTRA1 pathogenic variant. (nih.gov)
Metabolism1
- Wanders RJ, Komen J, Ferdinandusse S. Phytanic acid metabolism in health and disease. (medscape.com)
Severe1
- As it is the most severe form of the disease it results in death within the first year of the birth. (healthcaremagic.com)
Retinitis2
- Retinitis pigmentosa is an expression of degenerative eye disease as the visual receptors are lost in the retina and the background structure of the eye is exposed. (diseasesdic.com)
- Most children with mild forms of Canavan disease have normal head size, although macrocephaly, retinitis pigmentosa, and seizures have been reported in a few individuals. (nih.gov)
Genetically heterogeneous1
- [ 8 ] Refsum disease is genetically heterogeneous, with up to 55% of cases not being linked to the PAHX gene locus at D10S547 to D10S223. (medscape.com)
Gene4
- A knowledge graph of biological entities such as genes, gene functions, diseases, phenotypes and chemicals. (edu.sa)
- Changes underlying arrhythmia in the transgenic heart overexpressing Refsum disease gene-associated protein. (medscape.com)
- X-linked ALD primarily affects males, but about one in five women with the disease gene develop some symptoms. (findmeacure.com)
- Because women have two X chromosomes, they have a spare normal gene as well as the abnormal one, so generally only carry the condition (although they may have a mild form of the disease). (findmeacure.com)
Symptoms1
- Diseases Treatments Dictionary This is complete solution to read all diseases treatments Which covers Prevention, Causes, Symptoms, Medical Terms, Drugs, Prescription, Natural Remedies with cures and Treatments. (diseasesdic.com)
Manifests1
- The disease presents in the first year of life and manifests with developmental delay, visual and hearing disturbances, and dysmorphic features. (medscape.com)
Form6
- Adrenomyeloneuropathy (AMN) is a milder form of this disease that occurs in a person's 20s or 30s. (msdmanuals.com)
- Anal cancer is a disease in which malignant (cancer) cells form in the tissues of the anus. (cancerhealthcenter.com)
- Collectively, they form a spectrum or continuum of disease. (cancerhealthcenter.com)
- and infantile Refsum disease is the mildest form. (cancerhealthcenter.com)
- Most individuals with Canavan disease have the neonatal/infantile form. (nih.gov)
- There are several different types of the disease which can be inherited, but the most common form is an X-linked condition. (findmeacure.com)
Lysosomal Storage3
- Lysosomal Storage Diseases, Nervous System" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (childrensmercy.org)
- This graph shows the total number of publications written about "Lysosomal Storage Diseases, Nervous System" by people in this website by year, and whether "Lysosomal Storage Diseases, Nervous System" was a major or minor topic of these publications. (childrensmercy.org)
- Below are the most recent publications written about "Lysosomal Storage Diseases, Nervous System" by people in Profiles. (childrensmercy.org)
Molecular3
- These CHO cell mutants are an apparently relevant animal cell model for studies on the molecular bases and primary defects of human peroxisome-deficient diseases. (jci.org)
- Enzymological and molecular basis of classical Refsum disease. (medscape.com)
- Now a large and ever increasing number of genetic subtypes has been described, and major advances in molecular and cellular biology have clarified the understanding of the role of different proteins in the physiology of peripheral nerve conduction in health and in disease. (medscape.com)
Defects1
- Tran D, Greenhill W, Wilson S. Infantile refsum disease with enamel defects: a case report. (medscape.com)
Infancy2
- Infantile Refsum disease makes its appearance in early infancy. (medscape.com)
- Breastfeeding and the risk of hospitalization for respiratory disease in infancy: a meta-analysis. (najms.com)
Liver1
- PAHX activity was undetectable in the liver tissue of a Refsum disease patient. (diseasesdic.com)
Deficiency1
- Some scientists have suggested that serious degenerative diseases may be due, at least partly, to prolonged deficiency in DHA. (eurovital.com)
Defective1
- We previously isolated two Chinese hamster ovary (CHO) cell mutants (Z24 and Z65) that resemble the fibroblasts from patients with such diseases, in their defective peroxisome assembly (Tsukamoto, T., S. Yokota, and Y. Fujiki. (jci.org)
Infectious diseases1
- However, in some cases, you may be referred to a doctor who specializes in treating lung disease (pulmonologist) or infectious diseases, or you may be advised to go to an emergency department. (striveforgoodhealth.com)
Primary1
- Addison disease, also known as primary adrenal insufficiency, is caused by abnormal function of the small hormone-producing glands on top of each kidney (adrenal glands). (beds.ac.uk)
Canavan1
- Children with mild/juvenile Canavan disease may have normal or mildly delayed speech or motor development early in life without regression. (nih.gov)
Clinical2
- Data from this registry may be used to generate descriptive statistics on demographics, and clinical characteristics, including co-morbidities, treatment patterns and adverse outcomes (resulting from treatment or disease), as well as patients' quality of life measurements. (umn.edu)
- Electrophysiological testing of patients with retinal disease began in clinical departments in the late nineteen forties. (org.es)
Centers2
- Inclusion in the update does not necessarily represent the views of the Centers for Disease Control and Prevention nor does it imply endorsement of the article's methods or findings. (cdc.gov)
- Analysis of longitudinal data from the Centers for Disease Control and Prevention Pediatric Nutrition Surveillance System. (najms.com)