Adrenal Cortex
Adrenal Glands
Adrenal Medulla
Zona Reticularis
Adrenocorticotropic Hormone
Zona Fasciculata
Cerebral Cortex
Adrenal Insufficiency
Prefrontal Cortex
Visual Cortex
Zona Glomerulosa
Steroid 11-beta-Hydroxylase
Motor Cortex
Adrenocortical Adenoma
Adrenal Cortex Function Tests
Adrenal Cortex Hormones
Adrenocortical Carcinoma
Auditory Cortex
Adrenal Hyperplasia, Congenital
Somatosensory Cortex
Cosyntropin
Aldosterone
Adrenodoxin
Hydrocortisone
Corticosterone
Aldosterone Synthase
Cholesterol Side-Chain Cleavage Enzyme
Encyclopedias as Topic
MedlinePlus
Pituitary ACTH Hypersecretion
Cushing Syndrome
ACTH-Secreting Pituitary Adenoma
Pituitary Gland
Saliva
Specimen Handling
Pituitary-Adrenal System
Hypothalamo-Hypophyseal System
Circadian Rhythm
Relationships between environmental organochlorine contaminant residues, plasma corticosterone concentrations, and intermediary metabolic enzyme activities in Great Lakes herring gull embryos. (1/59)
Experiments were conducted to survey and detect differences in plasma corticosterone concentrations and intermediary metabolic enzyme activities in herring gull (Larus argentatus) embryos environmentally exposed to organochlorine contaminants in ovo. Unincubated fertile herring gull eggs were collected from an Atlantic coast control site and various Great Lakes sites in 1997 and artificially incubated in the laboratory. Liver and/or kidney tissues from approximately half of the late-stage embryos were analyzed for the activities of various intermediary metabolic enzymes known to be regulated, at least in part, by corticosteroids. Basal plasma corticosterone concentrations were determined for the remaining embryos. Yolk sacs were collected from each embryo and a subset was analyzed for organochlorine contaminants. Regression analysis of individual yolk sac organochlorine residue concentrations, or 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQs), with individual basal plasma corticosterone concentrations indicated statistically significant inverse relationships for polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans (PCDDs/PCDFs), total polychlorinated biphenyls (PCBs), non-ortho PCBs, and TEQs. Similarly, inverse relationships were observed for the activities of two intermediary metabolic enzymes (phosphoenolpyruvate carboxykinase and malic enzyme) when regressed against PCDDs/PCDFs. Overall, these data suggest that current levels of organochlorine contamination may be affecting the hypothalamo-pituitary-adrenal axis and associated intermediary metabolic pathways in environmentally exposed herring gull embryos in the Great Lakes. (+info)Dual effects of prolonged ACTH stimulation on 4-hydroxyaminoquinoline 1-oxide-induced adrenocortical lesions in rats. (2/59)
The effects of a long-acting synthetic ACTH on 4-hydroxyaminoquinoline 1-oxide (4HAQO)-induced adrenocortical lesions were investigated in female rats. A total of 140 6-week-old rats were divided into 4 equal groups, given a single s.c. injection of 7 mg/kg 4HAQO or vehicle, followed by repeated sc administration of the synthetic ACTH or no further treatment. Subgroups of 10 rats in each group were sequentially sacrificed at weeks 20, 30, and 40. Adenomas and adenomatous nodules developed in the adrenal cortex of animals receiving 4HAQO and the chronic ACTH stimulation. Both lesions were located in the deeper zones of the adrenal cortex adjacent to the medulla and were composed of large-sized, clear-type cells. From week 20, middle zone, cortical cystic degeneration, which mimics the age-associated degenerative change named adrenal peliosis, was frequently observed in the adrenal glands of animals treated with 4HAQO alone. Its development was inhibited by ACTH. In the control animals, peliotic changes occurred at low incidence and only at the termination of experiment. These results indicate that long-term stimulation of ACTH promotes the development of adrenocortical tumors but suppresses the occurrence of adrenal peliosis in rats treated with 4HAQO. (+info)Lower baseline plasma cortisol and prolactin together with increased body temperature and higher mCPP-induced cortisol responses in men with pedophilia. (3/59)
There is some evidence that hormonal and serotonergic alterations may play a role in the pathophysiology of paraphilias. The aims of the present study were to examine: 1) baseline plasma cortisol, plasma prolactin, and body temperature; and 2) cortisol, prolactin, body temperature, as well as behavioral responses to meta-chlorophenylpiperazine (mCPP) and placebo in pedophiles and normal men. Pedophiles showed significantly lower baseline plasma cortisol and prolactin concentrations and a higher body temperature than normal volunteers. The mCPP-induced cortisol responses were significantly greater in pedophiles than in normal volunteers. In normal volunteers, mCPP-induced a hyperthermic response, whereas in pedophiles no such response was observed. mCPP induced different behavioral responses in pedophiles than in normal men. In pedophiles, but not in normal men, mCPP increased the sensations "feeling dizzy, " "restless," and "strange" and decreased the sensation "feeling hungry". The results suggest that there are several serotonergic disturbances in pedophiles. It is hypothesized that the results are compatible with a decreased activity of the serotonergic presynaptic neuron and a 5-HT2 postsynaptic receptor hyperresponsivity. (+info)Structure-activity relationships for ulcerogenic and adrenocorticolytic effects of alkyl nitriles, amines, and thiols. (4/59)
In rats, a single administration of acrylonitrile (vinyl cyanide) produces a rapidly occurring bilateral adrenal apoplexy. Structure-activity studies have shown that a close derivative, propionitrile (ethyl cyanide), causes duodenal ulcer without markedly affecting the adrenal glands. Prolonging the two-carbon chain of propionitrile by a methyl group (n-butyronitrile) enhances, replacing the methyl by bromide or nitrile decreases, while substitution by an amino group abolistes the ulcerogenic potency and variably affects the adrenocorticolytic action. On assaying a large number of nonnitrile compounds as well for ulcerogenic effect, such as thiols and amines, this effect was found to be related to a two-carbon structure bearing electronegative radicals on one or both ends of the chain. (+info)Molecular cloning, chromosomal localization of human peripheral-type benzodiazepine receptor and PKA regulatory subunit type 1A (PRKAR1A)-associated protein PAP7, and studies in PRKAR1A mutant cells and tissues. (5/59)
A mouse protein that interacts with the peripheral-type benzodiazepine receptor (PBR) and cAMP-dependent protein kinase A (PKA) regulatory subunit RIalpha (PRKAR1A), named PBR and PKA-associated protein 7 (PAP7), was identified and shown to be involved in hormone-induced steroid biosynthesis. We report the identification of the human PAP7 gene, its expression pattern, genomic structure, and chromosomal mapping to 1q32-1q41. Human PAP7 is a 60-kDa protein highly homologous to the rodent protein. PAP7 is widely present in human tissues and highly expressed in seminal vesicles, pituitary, thyroid, pancreas, renal cortex, enteric epithelium, muscles, myocardium and in steroidogenic tissues, including the gonads and adrenal cortex. These tissues are also targets of Carney complex (CNC), a multiple neoplasia syndrome caused by germline inactivating PRKAR1A mutations (PRKAR1A-mut) and associated with primary pigmented nodular adrenocortical disease (PPNAD) and increased steroid synthesis. PAP7 and PRKAR1A expression were studied in PPNAD and in lymphoblasts from patients bearing PRKAR1A-mut. Like PRKAR1A, PAP7 was decreased in CNC lymphocytes and PPNAD nodules, but not in the surrounding cortex. These studies showed that, like in the mouse, human PAP7 is highly expressed in steroidogenic tissues, where it follows the pattern of PRKAR1A expression, suggesting that it participates in PRKAR1A-mediated tumorigenesis and hypercortisolism. (+info)Allgrove or 4 "A" syndrome: an autosomal recessive syndrome causing multisystem neurological disease. (6/59)
Allgrove's or "4 A" syndrome is a rare autosomal recessive condition with alacrima, achalasia, autonomic disturbance, and ACTH insensitivity among other features. Recent studies have identified mutations in the AAAS, a candidate gene on chromosome 12q13 in such patients. Manifestations in adult patients are rarely reported. The syndrome usually presents during the first decade of life with dysphagia or severe (occasionally fatal) hypoglycaemic or hypotensive attacks, related to adrenocortical insufficiency. Onset of adrenal insufficiency or other features may be delayed to adulthood. In contrast with paediatric patients, adult patients with Allgrove's syndrome may present with multisystem neurological disease; the childhood history of achalasia or alacrima may be overlooked. The authors describe two families with two affected siblings and a further unrelated patient with typical clinical features of Allgrove's syndrome, who exhibit signs of multisystem neurological disease including hyperreflexia, muscle wasting, dysarthria, ataxia, optic atrophy, and intellectual impairment. None of the cases have developed adrenal insufficiency but all have progressive neurological disability. Autonomic dysfunction was a significant cause of morbidity in two cases. The three index cases represent the longest described follow up of Allgrove's syndrome into adulthood. It is speculated that they represent a subgroup of patients who follow an often undiagnosed chronic neurological course. Recognition of the syndrome presenting in adult life permits treatment of unrecognised autonomic dysfunction, adrenal insufficiency and dysphagia, and appropriate genetic advice. (+info)Cushing's syndrome due to bilateral adrenocortical adenomas with unique histological features. (7/59)
Cushing's syndrome due to bilateral cortisol-secreting adenomas rarely occurs. We present a case of Cushing's syndrome due to bilateral adenomas. Both adenomas had distinct cell compositions, and were compared with emphasis on immunohistochemical and enzyme histochemical analysis for cytochrome P450(11beta) and 3beta-hydroxysteroid dehydrogenase (3betaHSD). A 37 year-old female was diagnosed with ACTH-independent Cushing's syndrome based on physical findings and hormonal evaluation. High-resolution CT scan showed bilateral adrenocortical adenomas and atrophied glands. 131I-methylnorcholesterol incorporation into both glands suggested both adenomas were functional. Clinical diagnosis prior to surgery was ACTH-independent Cushing's syndrome due to functioning bilateral adenomas. The left adrenal gland was totally resected, while the right one was partially resected by laparoscopic approach. Both adenomas were black on cut sections, and were comparatively evaluated by immunohistochemical and enzyme histochemical analysis for P450(11beta) and 3betaSD. The left adenoma was 1.6 cm in diameter and had a complex cellular composition and enzyme expression similar to that of primary pigmented nodular adrenocortical disease (PPNAD), while the right adenoma was 1.8 cm in diameter with compact cells typical of a solitary cortisol-producing adenoma. Adjacent bilateral adrenal cortex showed marked atrophy, but contained several micronodules. Serum cortisol levels, both at basal and after a low dodexamethasone, normalized thirteen months after surgery. In conclusion, the present case of Cushing's syndrome with bilateral adrenal adenomas demonstrated for the first time the simultaneous occurrence of two distinct adenomas, an ordinary cortisol-producing adenoma and a PPNAD-like adenoma. Further case reports of multiple adrenal adenomas should be well-analyzed to clarify whether the results from this case represent a new subgroup of ACTH-independent Cushing's syndrome. (+info)Aldosteronism associated with adrenal cortical adenoma. (8/59)
An electrolyte-regulating corticoid has been identified and given the name aldosterone. This hormone may be produced in amounts above normal in adrenal cortical tumors in hyperplastic adrenal glands and in normal appearing adrenal glands. Overproduction of aldosterone is accompanied by certain characteristic clinical manifestations which should suggest the diagnosis. The diagnosis may be supported by examinations available in most well equipped clinical laboratories. Bioassay of aldosterone in the urine and estimation of exchangeable body sodium and potassium, using radioactive salts, are necessary for confirmation of the diagnosis.Since the description of this salt-retaining hormone by Simpson and Tait and the discovery of its chemical structure by Reichstein in 1954, reports of 14 cases have been published. Surgical removal of the offending tissue gives spectacular relief from the very distressing symptoms. (+info)Adrenal cortex diseases refer to a group of conditions that affect the adrenal glands, which are small glands located on top of the kidneys. The adrenal glands consist of two parts: the outer adrenal cortex and the inner medulla. The adrenal cortex is responsible for producing hormones such as cortisol, aldosterone, and androgens that regulate various bodily functions, including metabolism, blood pressure, and sexual development.
Diseases of the adrenal cortex can result from an overproduction or underproduction of these hormones. Some common adrenal cortex diseases include:
1. Addison's disease: a condition characterized by insufficient production of hormones by the adrenal glands, leading to symptoms such as fatigue, weight loss, low blood pressure, and darkening of the skin.
2. Cushing's syndrome: a condition caused by an excess of cortisol in the body, which can result from taking high doses of corticosteroid medications or from a tumor in the pituitary gland or adrenal glands. Symptoms include weight gain, particularly around the trunk and face, thinning of the skin, easy bruising, muscle weakness, and mood changes.
3. Congenital adrenal hyperplasia: a group of inherited disorders that affect the production of hormones by the adrenal glands. Depending on the specific type of congenital adrenal hyperplasia, symptoms can range from ambiguous genitalia in newborns to precocious puberty, short stature, and infertility in older children and adults.
4. Adrenal tumors: benign or cancerous growths that develop in the adrenal glands and can cause hormonal imbalances. Symptoms depend on the type of tumor and the hormones it produces.
Treatment for adrenal cortex diseases depends on the specific condition and its underlying cause. Treatment options may include medication, surgery, or radiation therapy.
The adrenal cortex is the outer portion of the adrenal gland, which is located on top of the kidneys. It plays a crucial role in producing hormones that are essential for various bodily functions. The adrenal cortex is divided into three zones:
1. Zona glomerulosa: This outermost zone produces mineralocorticoids, primarily aldosterone. Aldosterone helps regulate sodium and potassium balance and thus influences blood pressure by controlling the amount of fluid in the body.
2. Zona fasciculata: The middle layer is responsible for producing glucocorticoids, with cortisol being the most important one. Cortisol regulates metabolism, helps manage stress responses, and has anti-inflammatory properties. It also plays a role in blood sugar regulation and maintaining the body's response to injury and illness.
3. Zona reticularis: The innermost zone produces androgens, primarily dehydroepiandrosterone (DHEA) and its sulfate form (DHEAS). These androgens are weak compared to those produced by the gonads (ovaries or testes), but they can be converted into more potent androgens or estrogens in peripheral tissues.
Disorders related to the adrenal cortex can lead to hormonal imbalances, affecting various bodily functions. Examples include Addison's disease (insufficient adrenal cortical hormone production) and Cushing's syndrome (excessive glucocorticoid levels).
The adrenal glands are a pair of endocrine glands that are located on top of the kidneys. Each gland has two parts: the outer cortex and the inner medulla. The adrenal cortex produces hormones such as cortisol, aldosterone, and androgens, which regulate metabolism, blood pressure, and other vital functions. The adrenal medulla produces catecholamines, including epinephrine (adrenaline) and norepinephrine (noradrenaline), which help the body respond to stress by increasing heart rate, blood pressure, and alertness.
Adrenal cortex neoplasms refer to abnormal growths (tumors) in the adrenal gland's outer layer, known as the adrenal cortex. These neoplasms can be benign or malignant (cancerous). Benign tumors are called adrenal adenomas, while cancerous tumors are called adrenocortical carcinomas.
Adrenal cortex neoplasms can produce various hormones, leading to different clinical presentations. For instance, they may cause Cushing's syndrome (characterized by excessive cortisol production), Conn's syndrome (caused by aldosterone excess), or virilization (due to androgen excess). Some tumors may not produce any hormones and are discovered incidentally during imaging studies for unrelated conditions.
The diagnosis of adrenal cortex neoplasms typically involves a combination of imaging techniques, such as CT or MRI scans, and hormonal assessments to determine if the tumor is functional or non-functional. In some cases, a biopsy may be necessary to confirm the diagnosis and differentiate between benign and malignant tumors. Treatment options depend on the type, size, location, and hormonal activity of the neoplasm and may include surgical excision, radiation therapy, chemotherapy, or a combination of these approaches.
The adrenal medulla is the inner part of the adrenal gland, which is located on top of the kidneys. It is responsible for producing and releasing hormones such as epinephrine (also known as adrenaline) and norepinephrine (also known as noradrenaline). These hormones play a crucial role in the body's "fight or flight" response, preparing the body for immediate action in response to stress.
Epinephrine increases heart rate, blood pressure, and respiratory rate, while also increasing blood flow to muscles and decreasing blood flow to the skin and digestive system. Norepinephrine has similar effects but is generally less potent than epinephrine. Together, these hormones help to prepare the body for physical activity and increase alertness and focus.
Disorders of the adrenal medulla can lead to a variety of symptoms, including high blood pressure, rapid heart rate, anxiety, and tremors. Some conditions that affect the adrenal medulla include pheochromocytoma, a tumor that causes excessive production of epinephrine and norepinephrine, and neuroblastoma, a cancerous tumor that arises from immature nerve cells in the adrenal gland.
The zona reticularis is a layer of the adrenal cortex, which is the outer part of the adrenal gland. These glands are located on top of the kidneys and are responsible for producing several important hormones. The adrenal cortex itself has three distinct layers: the zona glomerulosa, the zona fasciculata, and the zona reticularis.
The zona reticularis is the innermost layer of the adrenal cortex. It is responsible for producing and releasing certain steroid hormones, particularly androgens such as dehydroepiandrosterone (DHEA) and its sulfate (DHEAS). These androgens are precursor hormones that can be converted into more potent androgens or estrogens in other parts of the body. The zona reticularis plays a crucial role in sexual development and function, as well as maintaining overall health and well-being.
Disorders related to the zona reticularis may result in abnormal hormone production, leading to conditions such as congenital adrenal hyperplasia, Cushing's syndrome, or Addison's disease. Proper diagnosis and treatment of these disorders typically involve endocrinologists, healthcare professionals specializing in hormonal and metabolic disorders.
Adrenal gland neoplasms refer to abnormal growths or tumors in the adrenal glands. These glands are located on top of each kidney and are responsible for producing hormones that regulate various bodily functions such as metabolism, blood pressure, and stress response. Adrenal gland neoplasms can be benign (non-cancerous) or malignant (cancerous).
Benign adrenal tumors are called adenomas and are usually small and asymptomatic. However, some adenomas may produce excessive amounts of hormones, leading to symptoms such as high blood pressure, weight gain, and mood changes.
Malignant adrenal tumors are called adrenocortical carcinomas and are rare but aggressive cancers that can spread to other parts of the body. Symptoms of adrenocortical carcinoma may include abdominal pain, weight loss, and hormonal imbalances.
It is important to diagnose and treat adrenal gland neoplasms early to prevent complications and improve outcomes. Diagnostic tests may include imaging studies such as CT scans or MRIs, as well as hormone level testing and biopsy. Treatment options may include surgery, radiation therapy, chemotherapy, or a combination of these approaches.
Adrenal gland diseases refer to a group of medical conditions that affect the function or structure of the adrenal glands. The adrenal glands are small, triangular-shaped glands located on top of each kidney. They are responsible for producing several essential hormones, including cortisol, aldosterone, and adrenaline (epinephrine).
There are various types of adrenal gland diseases, some of which include:
1. Adrenal Insufficiency: A condition where the adrenal glands do not produce enough hormones, particularly cortisol and aldosterone. This can lead to symptoms such as fatigue, weight loss, low blood pressure, and skin hyperpigmentation.
2. Cushing's Syndrome: A condition characterized by an excess of cortisol in the body. It can be caused by a tumor in the pituitary gland or adrenal glands, or it can result from long-term use of steroid medications.
3. Adrenal Cancer: A rare type of cancer that affects the adrenal glands. Symptoms may include abdominal pain, weight loss, and high blood pressure.
4. Pheochromocytoma: A tumor that develops in the adrenal glands and causes an overproduction of adrenaline (epinephrine) and noradrenaline (norepinephrine). Symptoms may include high blood pressure, headaches, sweating, and anxiety.
5. Adrenal Hemorrhage: A condition where bleeding occurs in the adrenal glands, often as a result of severe trauma or infection. This can lead to adrenal insufficiency and other complications.
6. Congenital Adrenal Hyperplasia: An inherited disorder that affects the production of cortisol and other hormones in the adrenal glands. Symptoms may include ambiguous genitalia, precocious puberty, and short stature.
Treatment for adrenal gland diseases varies depending on the specific condition and its severity. Treatment options may include medication, surgery, or radiation therapy.
Adrenocorticotropic Hormone (ACTH) is a hormone produced and released by the anterior pituitary gland, a small endocrine gland located at the base of the brain. ACTH plays a crucial role in the regulation of the body's stress response and has significant effects on various physiological processes.
The primary function of ACTH is to stimulate the adrenal glands, which are triangular-shaped glands situated on top of the kidneys. The adrenal glands consist of two parts: the outer cortex and the inner medulla. ACTH specifically targets the adrenal cortex, where it binds to specific receptors and initiates a series of biochemical reactions leading to the production and release of steroid hormones, primarily cortisol (a glucocorticoid) and aldosterone (a mineralocorticoid).
Cortisol is involved in various metabolic processes, such as regulating blood sugar levels, modulating the immune response, and helping the body respond to stress. Aldosterone plays a vital role in maintaining electrolyte and fluid balance by promoting sodium reabsorption and potassium excretion in the kidneys.
ACTH release is controlled by the hypothalamus, another part of the brain, which produces corticotropin-releasing hormone (CRH). CRH stimulates the anterior pituitary gland to secrete ACTH, which in turn triggers cortisol production in the adrenal glands. This complex feedback system helps maintain homeostasis and ensures that appropriate amounts of cortisol are released in response to various physiological and psychological stressors.
Disorders related to ACTH can lead to hormonal imbalances, resulting in conditions such as Cushing's syndrome (excessive cortisol production) or Addison's disease (insufficient cortisol production). Proper diagnosis and management of these disorders typically involve assessing the function of the hypothalamic-pituitary-adrenal axis and addressing any underlying issues affecting ACTH secretion.
The Zona Fasciculata is a region within the adrenal gland, which is a small gland located on top of the kidneys. It plays an essential role in endocrine function. The adrenal gland is divided into two main parts: the outer cortex and the inner medulla. The cortex itself is further divided into three zones: the Zona Glomerulosa, the Zona Fasciculata, and the Zona Reticularis.
The Zona Fasciculata is the middle layer of the adrenal cortex. It is primarily responsible for producing and releasing steroid hormones, particularly glucocorticoids such as cortisol. Cortisol helps regulate metabolism, immune response, and stress response, among other functions. The Zona Fasciculata contains large, column-shaped cells called fasciculated cells that contain lipid droplets filled with cholesterol esters. These cells convert cholesterol into pregnenolone, which is then converted into cortisol through a series of enzymatic reactions.
In summary, the Zona Fasciculata is a crucial region within the adrenal gland that produces and releases cortisol, a vital glucocorticoid hormone involved in various physiological processes.
The cerebral cortex is the outermost layer of the brain, characterized by its intricate folded structure and wrinkled appearance. It is a region of great importance as it plays a key role in higher cognitive functions such as perception, consciousness, thought, memory, language, and attention. The cerebral cortex is divided into two hemispheres, each containing four lobes: the frontal, parietal, temporal, and occipital lobes. These areas are responsible for different functions, with some regions specializing in sensory processing while others are involved in motor control or associative functions. The cerebral cortex is composed of gray matter, which contains neuronal cell bodies, and is covered by a layer of white matter that consists mainly of myelinated nerve fibers.
Adrenal insufficiency is a condition in which the adrenal glands do not produce adequate amounts of certain hormones, primarily cortisol and aldosterone. Cortisol helps regulate metabolism, respond to stress, and suppress inflammation, while aldosterone helps regulate sodium and potassium levels in the body to maintain blood pressure.
Primary adrenal insufficiency, also known as Addison's disease, occurs when there is damage to the adrenal glands themselves, often due to autoimmune disorders, infections, or certain medications. Secondary adrenal insufficiency occurs when the pituitary gland fails to produce enough adrenocorticotropic hormone (ACTH), which stimulates the adrenal glands to produce cortisol.
Symptoms of adrenal insufficiency may include fatigue, weakness, weight loss, decreased appetite, nausea, vomiting, diarrhea, abdominal pain, low blood pressure, dizziness, and darkening of the skin. Treatment typically involves replacing the missing hormones with medications taken orally or by injection.
The prefrontal cortex is the anterior (frontal) part of the frontal lobe in the brain, involved in higher-order cognitive processes such as planning complex cognitive behavior, personality expression, decision making, and moderating social behavior. It also plays a significant role in working memory and executive functions. The prefrontal cortex is divided into several subregions, each associated with specific cognitive and emotional functions. Damage to the prefrontal cortex can result in various impairments, including difficulties with planning, decision making, and social behavior regulation.
The visual cortex is the part of the brain that processes visual information. It is located in the occipital lobe, which is at the back of the brain. The visual cortex is responsible for receiving and interpreting signals from the retina, which are then transmitted through the optic nerve and optic tract.
The visual cortex contains several areas that are involved in different aspects of visual processing, such as identifying shapes, colors, and movements. These areas work together to help us recognize and understand what we see. Damage to the visual cortex can result in various visual impairments, such as blindness or difficulty with visual perception.
Zona glomerulosa is a region of the adrenal gland, specifically the outer portion of the adrenal cortex. It is responsible for producing mineralocorticoids, with the principal one being aldosterone. Aldosterone helps regulate electrolyte and fluid balance in the body by increasing the reabsorption of sodium ions and water in the distal nephron of the kidney while promoting the excretion of potassium ions. This process assists in maintaining blood pressure and volume within normal ranges. The zona glomerulosa's function is primarily under the control of the renin-angiotensin-aldosterone system (RAAS).
Steroid 11-beta-hydroxylase is a crucial enzyme involved in the steroidogenesis pathway, specifically in the synthesis of cortisol and aldosterone, which are vital hormones produced by the adrenal glands. This enzyme is encoded by the CYP11B1 gene in humans.
The enzyme's primary function is to catalyze the conversion of 11-deoxycortisol to cortisol and 11-deoxycorticosterone to aldosterone through the process of hydroxylation at the 11-beta position of the steroid molecule. Cortisol is a critical glucocorticoid hormone that helps regulate metabolism, immune response, and stress response, while aldosterone is a mineralocorticoid hormone responsible for maintaining electrolyte and fluid balance in the body.
Deficiencies or mutations in the CYP11B1 gene can lead to various disorders, such as congenital adrenal hyperplasia (CAH), which may result in impaired cortisol and aldosterone production, causing hormonal imbalances and associated symptoms.
The motor cortex is a region in the frontal lobe of the brain that is responsible for controlling voluntary movements. It is involved in planning, initiating, and executing movements of the limbs, body, and face. The motor cortex contains neurons called Betz cells, which have large cell bodies and are responsible for transmitting signals to the spinal cord to activate muscles. Damage to the motor cortex can result in various movement disorders such as hemiplegia or paralysis on one side of the body.
An adrenocortical adenoma is a benign tumor that arises from the cells of the adrenal cortex, which is the outer layer of the adrenal gland. These tumors can produce and release various hormones, such as cortisol, aldosterone, or androgens, depending on the type of cells they originate from.
Most adrenocortical adenomas are nonfunctioning, meaning that they do not secrete excess hormones and may not cause any symptoms. However, some functioning adenomas can produce excessive amounts of hormones, leading to a variety of clinical manifestations. For example:
* Cortisol-secreting adenomas can result in Cushing's syndrome, characterized by weight gain, muscle wasting, thin skin, easy bruising, and mood changes.
* Aldosterone-producing adenomas can cause Conn's syndrome, marked by hypertension (high blood pressure), hypokalemia (low potassium levels), and metabolic alkalosis.
* Androgen-secreting adenomas may lead to hirsutism (excessive hair growth) or virilization (development of male secondary sexual characteristics) in women.
The diagnosis of an adrenocortical adenoma typically involves imaging tests, such as CT or MRI scans, and hormonal evaluations to determine if the tumor is functioning or not. Treatment usually consists of surgical removal of the tumor, especially if it is causing hormonal imbalances or growing in size.
Adrenal cortex function tests are a group of diagnostic tests that evaluate the proper functioning of the adrenal cortex, which is the outer layer of the adrenal glands. These glands are located on top of each kidney and are responsible for producing several essential hormones. The adrenal cortex produces hormones such as cortisol, aldosterone, and androgens.
There are several types of adrenal cortex function tests, including:
1. Cortisol testing: This test measures the levels of cortisol in the blood or urine to determine if the adrenal glands are producing adequate amounts of this hormone. Cortisol helps regulate metabolism, immune response, and stress response.
2. ACTH (adrenocorticotropic hormone) stimulation test: This test measures the adrenal gland's response to ACTH, a hormone produced by the pituitary gland that stimulates the adrenal glands to produce cortisol. The test involves administering synthetic ACTH and measuring cortisol levels before and after administration.
3. Aldosterone testing: This test measures the levels of aldosterone in the blood or urine to determine if the adrenal glands are producing adequate amounts of this hormone. Aldosterone helps regulate electrolyte balance and blood pressure.
4. Dexamethasone suppression test: This test involves administering dexamethasone, a synthetic corticosteroid, to suppress cortisol production. The test measures cortisol levels before and after administration to determine if the adrenal glands are overproducing cortisol.
5. Androgen testing: This test measures the levels of androgens, such as testosterone and dehydroepiandrosterone (DHEA), in the blood or urine to determine if the adrenal glands are producing excessive amounts of these hormones.
Abnormal results from adrenal cortex function tests may indicate conditions such as Addison's disease, Cushing's syndrome, congenital adrenal hyperplasia, and pheochromocytoma.
The adrenal cortex hormones are a group of steroid hormones produced and released by the outer portion (cortex) of the adrenal glands, which are located on top of each kidney. These hormones play crucial roles in regulating various physiological processes, including:
1. Glucose metabolism: Cortisol helps control blood sugar levels by increasing glucose production in the liver and reducing its uptake in peripheral tissues.
2. Protein and fat metabolism: Cortisol promotes protein breakdown and fatty acid mobilization, providing essential building blocks for energy production during stressful situations.
3. Immune response regulation: Cortisol suppresses immune function to prevent overactivation and potential damage to the body during stress.
4. Cardiovascular function: Aldosterone regulates electrolyte balance and blood pressure by promoting sodium reabsorption and potassium excretion in the kidneys.
5. Sex hormone production: The adrenal cortex produces small amounts of sex hormones, such as androgens and estrogens, which contribute to sexual development and function.
6. Growth and development: Cortisol plays a role in normal growth and development by influencing the activity of growth-promoting hormones like insulin-like growth factor 1 (IGF-1).
The main adrenal cortex hormones include:
1. Glucocorticoids: Cortisol is the primary glucocorticoid, responsible for regulating metabolism and stress response.
2. Mineralocorticoids: Aldosterone is the primary mineralocorticoid, involved in electrolyte balance and blood pressure regulation.
3. Androgens: Dehydroepiandrosterone (DHEA) and its sulfate derivative (DHEAS) are the most abundant adrenal androgens, contributing to sexual development and function.
4. Estrogens: Small amounts of estrogens are produced by the adrenal cortex, mainly in women.
Disorders related to impaired adrenal cortex hormone production or regulation can lead to various clinical manifestations, such as Addison's disease (adrenal insufficiency), Cushing's syndrome (hypercortisolism), and congenital adrenal hyperplasia (CAH).
Adrenocortical carcinoma (ACC) is a rare cancer that develops in the outer layer of the adrenal gland, known as the adrenal cortex. The adrenal glands are small hormone-producing glands located on top of each kidney. They produce important hormones such as cortisol, aldosterone, and sex steroids.
ACC is a malignant tumor that can invade surrounding tissues and organs and may metastasize (spread) to distant parts of the body. Symptoms of ACC depend on the size and location of the tumor and whether it produces excess hormones. Common symptoms include abdominal pain, a mass in the abdomen, weight loss, and weakness. Excessive production of hormones can lead to additional symptoms such as high blood pressure, Cushing's syndrome, virilization (excessive masculinization), or feminization.
The exact cause of ACC is not known, but genetic factors, exposure to certain chemicals, and radiation therapy may increase the risk of developing this cancer. Treatment options for ACC include surgery, chemotherapy, radiation therapy, and targeted therapy. The prognosis for ACC varies depending on the stage and extent of the disease at diagnosis, as well as the patient's overall health.
The auditory cortex is the region of the brain that is responsible for processing and analyzing sounds, including speech. It is located in the temporal lobe of the cerebral cortex, specifically within the Heschl's gyrus and the surrounding areas. The auditory cortex receives input from the auditory nerve, which carries sound information from the inner ear to the brain.
The auditory cortex is divided into several subregions that are responsible for different aspects of sound processing, such as pitch, volume, and location. These regions work together to help us recognize and interpret sounds in our environment, allowing us to communicate with others and respond appropriately to our surroundings. Damage to the auditory cortex can result in hearing loss or difficulty understanding speech.
Congenital Adrenal Hyperplasia (CAH) is a group of inherited genetic disorders that affect the adrenal glands, which are triangular-shaped glands located on top of the kidneys. The adrenal glands are responsible for producing several essential hormones, including cortisol, aldosterone, and androgens.
CAH is caused by mutations in genes that code for enzymes involved in the synthesis of these hormones. The most common form of CAH is 21-hydroxylase deficiency, which affects approximately 90% to 95% of all cases. Other less common forms of CAH include 11-beta-hydroxylase deficiency and 3-beta-hydroxysteroid dehydrogenase deficiency.
The severity of the disorder can vary widely, depending on the degree of enzyme deficiency. In severe cases, the lack of cortisol production can lead to life-threatening salt wasting and electrolyte imbalances in newborns. The excess androgens produced due to the enzyme deficiency can also cause virilization, or masculinization, of female fetuses, leading to ambiguous genitalia at birth.
In milder forms of CAH, symptoms may not appear until later in childhood or even adulthood. These may include early puberty, rapid growth followed by premature fusion of the growth plates and short stature, acne, excessive hair growth, irregular menstrual periods, and infertility.
Treatment for CAH typically involves replacing the missing hormones with medications such as hydrocortisone, fludrocortisone, and/or sex hormones. Regular monitoring of hormone levels and careful management of medication doses is essential to prevent complications such as adrenal crisis, growth suppression, and osteoporosis.
In severe cases of CAH, early diagnosis and treatment can help prevent or minimize the risk of serious health problems and improve quality of life. Genetic counseling may also be recommended for affected individuals and their families to discuss the risks of passing on the disorder to future generations.
The somatosensory cortex is a part of the brain located in the postcentral gyrus of the parietal lobe, which is responsible for processing sensory information from the body. It receives and integrates tactile, proprioceptive, and thermoception inputs from the skin, muscles, joints, and internal organs, allowing us to perceive and interpret touch, pressure, pain, temperature, vibration, position, and movement of our body parts. The somatosensory cortex is organized in a map-like manner, known as the sensory homunculus, where each body part is represented according to its relative sensitivity and density of innervation. This organization allows for precise localization and discrimination of tactile stimuli across the body surface.
Cosyntropin is a synthetic form of adrenocorticotropic hormone (ACTH) that is used in medical testing to assess the function of the adrenal glands. ACTH is a hormone produced and released by the pituitary gland that stimulates the production and release of cortisol, a steroid hormone produced by the adrenal glands.
Cosyntropin is typically administered as an injection, and its effects on cortisol production are measured through blood tests taken at various time points after administration. This test, known as a cosyntropin stimulation test or ACTH stimulation test, can help diagnose conditions that affect the adrenal glands, such as Addison's disease or adrenal insufficiency.
It is important to note that while cosyntropin is a synthetic form of ACTH, it is not identical to the natural hormone and may have slightly different effects on the body. Therefore, it should only be used under the supervision of a healthcare professional.
Aldosterone is a hormone produced by the adrenal gland. It plays a key role in regulating sodium and potassium balance and maintaining blood pressure through its effects on the kidneys. Aldosterone promotes the reabsorption of sodium ions and the excretion of potassium ions in the distal tubules and collecting ducts of the nephrons in the kidneys. This increases the osmotic pressure in the blood, which in turn leads to water retention and an increase in blood volume and blood pressure.
Aldosterone is released from the adrenal gland in response to a variety of stimuli, including angiotensin II (a peptide hormone produced as part of the renin-angiotensin-aldosterone system), potassium ions, and adrenocorticotropic hormone (ACTH) from the pituitary gland. The production of aldosterone is regulated by a negative feedback mechanism involving sodium levels in the blood. High sodium levels inhibit the release of aldosterone, while low sodium levels stimulate its release.
In addition to its role in maintaining fluid and electrolyte balance and blood pressure, aldosterone has been implicated in various pathological conditions, including hypertension, heart failure, and primary hyperaldosteronism (a condition characterized by excessive production of aldosterone).
Adrenalectomy is a surgical procedure in which one or both adrenal glands are removed. The adrenal glands are small, triangular-shaped glands located on top of each kidney that produce hormones such as cortisol, aldosterone, and adrenaline (epinephrine).
There are several reasons why an adrenalectomy may be necessary. For example, the procedure may be performed to treat tumors or growths on the adrenal glands, such as pheochromocytomas, which can cause high blood pressure and other symptoms. Adrenalectomy may also be recommended for patients with Cushing's syndrome, a condition in which the body is exposed to too much cortisol, or for those with adrenal cancer.
During an adrenalectomy, the surgeon makes an incision in the abdomen or back and removes the affected gland or glands. In some cases, laparoscopic surgery may be used, which involves making several small incisions and using specialized instruments to remove the gland. After the procedure, patients may need to take hormone replacement therapy to compensate for the loss of adrenal gland function.
Adrenodoxin is a small iron-sulfur protein that plays a crucial role in the steroidogenesis process within the mitochondria of cells. It functions as an electron carrier in the final steps of steroid hormone biosynthesis, specifically during the conversion of cholesterol to pregnenolone. This conversion is catalyzed by the cytochrome P450 side-chain cleavage enzyme (P450scc), which requires adrenodoxin to donate electrons for its activity. Adrenodoxin itself receives electrons from another protein, adrenodoxin reductase, in a series of redox reactions. Proper adrenodoxin function is essential for the production of various steroid hormones, including cortisol, aldosterone, and sex hormones.
Hydrocortisone is a synthetic glucocorticoid, which is a class of steroid hormones. It is identical to the naturally occurring cortisol, a hormone produced by the adrenal gland that helps regulate metabolism and helps your body respond to stress. Hydrocortisone has anti-inflammatory effects and is used to treat various inflammatory conditions such as allergies, skin disorders, and autoimmune diseases. It works by suppressing the immune system's response to reduce swelling, redness, itching, and other symptoms caused by inflammation.
Hydrocortisone is available in different forms, including oral tablets, topical creams, lotions, gels, and ointments, as well as injectable solutions. The specific use and dosage depend on the condition being treated and the individual patient's medical history and current health status.
As with any medication, hydrocortisone can have side effects, especially when used in high doses or for extended periods. Common side effects include increased appetite, weight gain, mood changes, insomnia, and skin thinning. Long-term use of hydrocortisone may also increase the risk of developing osteoporosis, diabetes, cataracts, and other health problems. Therefore, it is essential to follow your healthcare provider's instructions carefully when using this medication.
Corticosterone is a hormone produced by the adrenal gland in many animals, including humans. It is a type of glucocorticoid steroid hormone that plays an important role in the body's response to stress, immune function, metabolism, and regulation of inflammation. Corticosterone helps to regulate the balance of sodium and potassium in the body and also plays a role in the development and functioning of the nervous system. It is the primary glucocorticoid hormone in rodents, while cortisol is the primary glucocorticoid hormone in humans and other primates.
Aldosterone synthase is a steroidogenic enzyme that is primarily responsible for the production of the hormone aldosterone in the adrenal gland. It is encoded by the CYP11B2 gene and is located within the mitochondria of the zona glomerulosa cells in the adrenal cortex.
Aldosterone synthase catalyzes two key reactions in the biosynthesis of aldosterone: the conversion of corticosterone to 18-hydroxycorticosterone and the subsequent conversion of 18-hydroxycorticosterone to aldosterone. These reactions involve the sequential addition of hydroxyl groups at the C18 position of the steroid molecule, which is a critical step in the synthesis of aldosterone.
Aldosterone plays an important role in regulating blood pressure and electrolyte balance by increasing the reabsorption of sodium and water in the distal nephron of the kidney, while promoting the excretion of potassium. Disorders of aldosterone synthase can lead to conditions such as primary hyperaldosteronism, which is characterized by excessive production of aldosterone and can result in hypertension and hypokalemia.
The Cholesterol Side-Chain Cleavage Enzyme, also known as Steroidogenic Acute Regulatory (StAR) protein or P450scc, is a complex enzymatic system that plays a crucial role in the production of steroid hormones. It is located in the inner mitochondrial membrane of steroid-producing cells, such as those found in the adrenal glands, gonads, and placenta.
The Cholesterol Side-Chain Cleavage Enzyme is responsible for converting cholesterol into pregnenolone, which is the first step in the biosynthesis of all steroid hormones, including cortisol, aldosterone, sex hormones, and vitamin D. This enzymatic complex consists of two components: a flavoprotein called NADPH-cytochrome P450 oxidoreductase, which provides electrons for the reaction, and a cytochrome P450 protein called CYP11A1, which catalyzes the actual cleavage of the cholesterol side chain.
Defects in the Cholesterol Side-Chain Cleavage Enzyme can lead to various genetic disorders, such as congenital lipoid adrenal hyperplasia (CLAH), a rare autosomal recessive disorder characterized by impaired steroidogenesis and accumulation of cholesteryl esters in the adrenal glands and gonads.
An encyclopedia is a comprehensive reference work containing articles on various topics, usually arranged in alphabetical order. In the context of medicine, a medical encyclopedia is a collection of articles that provide information about a wide range of medical topics, including diseases and conditions, treatments, tests, procedures, and anatomy and physiology. Medical encyclopedias may be published in print or electronic formats and are often used as a starting point for researching medical topics. They can provide reliable and accurate information on medical subjects, making them useful resources for healthcare professionals, students, and patients alike. Some well-known examples of medical encyclopedias include the Merck Manual and the Stedman's Medical Dictionary.
MedlinePlus is not a medical term, but rather a consumer health website that provides high-quality, accurate, and reliable health information, written in easy-to-understand language. It is produced by the U.S. National Library of Medicine, the world's largest medical library, and is widely recognized as a trusted source of health information.
MedlinePlus offers information on various health topics, including conditions, diseases, tests, treatments, and wellness. It also provides access to drug information, medical dictionary, and encyclopedia, as well as links to clinical trials, medical news, and patient organizations. The website is available in both English and Spanish and can be accessed for free.
Pituitary ACTH hypersecretion, also known as Cushing's disease, is a condition characterized by the excessive production of adrenocorticotropic hormone (ACTH) from the pituitary gland. This results in an overproduction of cortisol, a steroid hormone produced by the adrenal glands, leading to a constellation of symptoms known as Cushing's syndrome.
In Cushing's disease, a benign tumor called an adenoma develops on the pituitary gland, causing it to release excess ACTH. This in turn stimulates the adrenal glands to produce more cortisol than necessary. The resulting high levels of cortisol can cause various symptoms such as weight gain, particularly around the trunk and face (central obesity), thinning of the skin, bruising, weakness, fatigue, mood changes, high blood pressure, and an increased risk of infections.
It is important to distinguish Cushing's disease from other causes of Cushing's syndrome, such as cortisol-producing adrenal tumors or exogenous sources of corticosteroid use, as the treatment approach may differ. Treatment for Cushing's disease typically involves surgical removal of the pituitary tumor, with additional medical management and/or radiation therapy in some cases.
Cushing syndrome is a hormonal disorder that occurs when your body is exposed to high levels of the hormone cortisol for a long time. This can happen due to various reasons such as taking high doses of corticosteroid medications or tumors that produce cortisol or adrenocorticotropic hormone (ACTH).
The symptoms of Cushing syndrome may include:
* Obesity, particularly around the trunk and upper body
* Thinning of the skin, easy bruising, and purple or red stretch marks on the abdomen, thighs, breasts, and arms
* Weakened bones, leading to fractures
* High blood pressure
* High blood sugar
* Mental changes such as depression, anxiety, and irritability
* Increased fatigue and weakness
* Menstrual irregularities in women
* Decreased fertility in men
Cushing syndrome can be diagnosed through various tests, including urine and blood tests to measure cortisol levels, saliva tests, and imaging tests to locate any tumors. Treatment depends on the cause of the condition but may include surgery, radiation therapy, chemotherapy, or adjusting medication dosages.
An ACTH-secreting pituitary adenoma is a type of tumor that develops in the pituitary gland, a small gland located at the base of the brain. This type of tumor is also known as Cushing's disease.
ACTH stands for adrenocorticotropic hormone, which is a hormone produced and released by the pituitary gland. ACTH stimulates the adrenal glands (small glands located on top of the kidneys) to produce cortisol, a steroid hormone that helps regulate metabolism, helps the body respond to stress, and suppresses inflammation.
In an ACTH-secreting pituitary adenoma, the tumor cells produce and release excessive amounts of ACTH, leading to overproduction of cortisol by the adrenal glands. This can result in a constellation of symptoms known as Cushing's syndrome, which may include weight gain (especially around the trunk), fatigue, muscle weakness, mood changes, thinning of the skin, easy bruising, and increased susceptibility to infections.
Treatment for an ACTH-secreting pituitary adenoma typically involves surgical removal of the tumor, followed by medications to manage cortisol levels if necessary. Radiation therapy may also be used in some cases.
The pituitary gland is a small, endocrine gland located at the base of the brain, in the sella turcica of the sphenoid bone. It is often called the "master gland" because it controls other glands and makes the hormones that trigger many body functions. The pituitary gland measures about 0.5 cm in height and 1 cm in width, and it weighs approximately 0.5 grams.
The pituitary gland is divided into two main parts: the anterior lobe (adenohypophysis) and the posterior lobe (neurohypophysis). The anterior lobe is further divided into three zones: the pars distalis, pars intermedia, and pars tuberalis. Each part of the pituitary gland has distinct functions and produces different hormones.
The anterior pituitary gland produces and releases several important hormones, including:
* Growth hormone (GH), which regulates growth and development in children and helps maintain muscle mass and bone strength in adults.
* Thyroid-stimulating hormone (TSH), which controls the production of thyroid hormones by the thyroid gland.
* Adrenocorticotropic hormone (ACTH), which stimulates the adrenal glands to produce cortisol and other steroid hormones.
* Follicle-stimulating hormone (FSH) and luteinizing hormone (LH), which regulate reproductive function in both males and females.
* Prolactin, which stimulates milk production in pregnant and lactating women.
The posterior pituitary gland stores and releases two hormones that are produced by the hypothalamus:
* Antidiuretic hormone (ADH), which helps regulate water balance in the body by controlling urine production.
* Oxytocin, which stimulates uterine contractions during childbirth and milk release during breastfeeding.
Overall, the pituitary gland plays a critical role in maintaining homeostasis and regulating various bodily functions, including growth, development, metabolism, and reproductive function.
Saliva is a complex mixture of primarily water, but also electrolytes, enzymes, antibacterial compounds, and various other substances. It is produced by the salivary glands located in the mouth. Saliva plays an essential role in maintaining oral health by moistening the mouth, helping to digest food, and protecting the teeth from decay by neutralizing acids produced by bacteria.
The medical definition of saliva can be stated as:
"A clear, watery, slightly alkaline fluid secreted by the salivary glands, consisting mainly of water, with small amounts of electrolytes, enzymes (such as amylase), mucus, and antibacterial compounds. Saliva aids in digestion, lubrication of oral tissues, and provides an oral barrier against microorganisms."
Specimen handling is a set of procedures and practices followed in the collection, storage, transportation, and processing of medical samples or specimens (e.g., blood, tissue, urine, etc.) for laboratory analysis. Proper specimen handling ensures accurate test results, patient safety, and data integrity. It includes:
1. Correct labeling of the specimen container with required patient information.
2. Using appropriate containers and materials to collect, store, and transport the specimen.
3. Following proper collection techniques to avoid contamination or damage to the specimen.
4. Adhering to specific storage conditions (temperature, time, etc.) before testing.
5. Ensuring secure and timely transportation of the specimen to the laboratory.
6. Properly documenting all steps in the handling process for traceability and quality assurance.
The pituitary-adrenal system, also known as the hypothalamic-pituitary-adrenal (HPA) axis, is a complex set of interactions between the hypothalamus, the pituitary gland, and the adrenal glands. This system plays a crucial role in the body's response to stress through the release of hormones that regulate various physiological processes.
The hypothalamus, located within the brain, receives information from the nervous system about the internal and external environment and responds by releasing corticotropin-releasing hormone (CRH) and vasopressin. These hormones then travel to the anterior pituitary gland, where they stimulate the release of adrenocorticotropic hormone (ACTH).
ACTH is transported through the bloodstream to the adrenal glands, which are located on top of the kidneys. The adrenal glands consist of two parts: the outer cortex and the inner medulla. ACTH specifically targets the adrenal cortex, causing it to release cortisol and other glucocorticoids, as well as androgens such as dehydroepiandrosterone (DHEA).
Cortisol has numerous effects on metabolism, immune function, and cardiovascular regulation. It helps regulate blood sugar levels, suppresses the immune system, and aids in the breakdown of fats, proteins, and carbohydrates to provide energy during stressful situations. DHEA can be converted into male and female sex hormones (androgens and estrogens) in various tissues throughout the body.
The pituitary-adrenal system is tightly regulated through negative feedback mechanisms. High levels of cortisol, for example, inhibit the release of CRH and ACTH from the hypothalamus and pituitary gland, respectively, thereby limiting further cortisol production. Dysregulation of this system has been implicated in several medical conditions, including Cushing's syndrome (overproduction of cortisol) and Addison's disease (underproduction of cortisol).
The Hypothalamo-Hypophyseal system, also known as the hypothalamic-pituitary system, is a crucial part of the endocrine system that regulates many bodily functions. It consists of two main components: the hypothalamus and the pituitary gland.
The hypothalamus is a region in the brain that receives information from various parts of the body and integrates them to regulate vital functions such as body temperature, hunger, thirst, sleep, and emotional behavior. It also produces and releases neurohormones that control the secretion of hormones from the pituitary gland.
The pituitary gland is a small gland located at the base of the brain, just below the hypothalamus. It consists of two parts: the anterior pituitary (also called adenohypophysis) and the posterior pituitary (also called neurohypophysis). The anterior pituitary produces and releases several hormones that regulate various bodily functions such as growth, metabolism, reproduction, and stress response. The posterior pituitary stores and releases hormones produced by the hypothalamus, including antidiuretic hormone (ADH) and oxytocin.
The hypothalamo-hypophyseal system works together to maintain homeostasis in the body by regulating various physiological processes through hormonal signaling. Dysfunction of this system can lead to several endocrine disorders, such as diabetes insipidus, pituitary tumors, and hypothalamic-pituitary axis disorders.
A circadian rhythm is a roughly 24-hour biological cycle that regulates various physiological and behavioral processes in living organisms. It is driven by the body's internal clock, which is primarily located in the suprachiasmatic nucleus (SCN) of the hypothalamus in the brain.
The circadian rhythm controls many aspects of human physiology, including sleep-wake cycles, hormone secretion, body temperature, and metabolism. It helps to synchronize these processes with the external environment, particularly the day-night cycle caused by the rotation of the Earth.
Disruptions to the circadian rhythm can have negative effects on health, leading to conditions such as insomnia, sleep disorders, depression, bipolar disorder, and even increased risk of chronic diseases like cancer, diabetes, and cardiovascular disease. Factors that can disrupt the circadian rhythm include shift work, jet lag, irregular sleep schedules, and exposure to artificial light at night.
Psychological stress is the response of an individual's mind and body to challenging or demanding situations. It can be defined as a state of emotional and physical tension resulting from adversity, demand, or change. This response can involve a variety of symptoms, including emotional, cognitive, behavioral, and physiological components.
Emotional responses may include feelings of anxiety, fear, anger, sadness, or frustration. Cognitive responses might involve difficulty concentrating, racing thoughts, or negative thinking patterns. Behaviorally, psychological stress can lead to changes in appetite, sleep patterns, social interactions, and substance use. Physiologically, the body's "fight-or-flight" response is activated, leading to increased heart rate, blood pressure, muscle tension, and other symptoms.
Psychological stress can be caused by a wide range of factors, including work or school demands, financial problems, relationship issues, traumatic events, chronic illness, and major life changes. It's important to note that what causes stress in one person may not cause stress in another, as individual perceptions and coping mechanisms play a significant role.
Chronic psychological stress can have negative effects on both mental and physical health, increasing the risk of conditions such as anxiety disorders, depression, heart disease, diabetes, and autoimmune diseases. Therefore, it's essential to identify sources of stress and develop effective coping strategies to manage and reduce its impact.
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Hormones17
- The adrenal cortex comprises three main zones, or layers that are regulated by distinct hormones as noted below. (wikipedia.org)
- Subsequent steps to generate aldosterone and cortisol, however, primarily occur in the adrenal cortex: Progesterone → (hydroxylation at C21) → 11-Deoxycorticosterone → (two further hydroxylations at C11 and C18) → Aldosterone Progesterone → (hydroxylation at C17) → 17-alpha-hydroxyprogesterone → (hydroxylation at C21) → 11-Deoxycortisol → (hydroxylation at C11) → Cortisol The adrenal cortex produces a number of different corticosteroid hormones. (wikipedia.org)
- Your adrenal glands make the hormones cortisol , aldosterone , adrenaline , and noradrenaline. (healthline.com)
- The adrenal glands are located at the top of each kidney and produce hormones that help regulate metabolism, blood sodium and potassium levels, blood pressure, response to stressors, immune function, and other essential functions. (health.mil)
- 1 The adrenal glands produce cortisol, aldosterone, catecholamines (epinephrine, norepinephrine, and dopamine), and small amounts of androgens (hormones with testosterone-like function). (health.mil)
- The medulla produces epinephrine-like hormones, while the cortex secretes corticosteroids . (medicalnewstoday.com)
- Damage to the cortex can disrupt the production of hormones such as cortisol, aldosterone, and androgens. (medicalnewstoday.com)
- The pituitary gland produces adrenocorticotropic hormone (ACTH), which stimulates the adrenal glands to produce other hormones. (medicalnewstoday.com)
- Consequently, the adrenal glands will also produce lower levels of hormones. (medicalnewstoday.com)
- The adrenal cortex secretes what hormones? (studystack.com)
- Overproduction of the hormones from the adrenal cortex is called? (studystack.com)
- For example, there has to be 90 percent destruction of the adrenal glands to be diagnosed with Addison's disease (a disorder in which the adrenal glands don't produce enough hormones). (mindbodygreen.com)
- Adrenal issues are not typically treated with medication that is designed to help the adrenal glands themselves, but to help regulate the hormones the adrenal glands are (or are not) making. (northwestpharmacy.com)
- Over time, the adrenal cortex gets completely destroyed and the glands are no longer able to produce the hormones they're supposed to - hormones your body needs daily. (northwestpharmacy.com)
- The adrenal gland sits next to the kidney and produces adrenaline and various steroid hormones. (supremepetfoods.com)
- eg, heat intolerance, weight loss) that may be due to release of thyroid hormones during the inflammatory phase of thyroiditis or from co-existence of Graves disease and Hashimoto thyroiditis in the gland. (merckmanuals.com)
- The most relevant hormones for the neuroendocrine axis are the adrenocorticotropic hormone (ACTH) and ß-endorphins, which stimulate the secretion of various endogenous substances, such as glucocorticoids, produced in the adrenal cortex, and noradrenaline and adrenaline, produced in the adrenal medulla and nerve endings 5-7 . (bvsalud.org)
Insufficiency33
- Adrenal disorders associated with skeletal muscle dysfunction include primary adrenal insufficiency, glucocorticoid excess, and hyperaldosteronism. (medscape.com)
- Primary adrenal insufficiency may be the result of autoimmune, infectious, or metastatic etiologies, with other causes including bilateral adrenal hemorrhage and specific drugs also included in the differential diagnoses. (medscape.com)
- The relationship between adrenal insufficiency and the HIV infection have been less investigated. (academicjournals.org)
- Only 5% of the HIV-infected patients in stage 4 had absolute adrenal insufficiency. (academicjournals.org)
- During 2002-2017, the most common incident adrenal gland disorder among male and female service members was adrenal insufficiency and the least common was adrenomedullary hyperfunction. (health.mil)
- Adrenal insufficiency was diagnosed among 267 females (crude overall incidence rate: 8.2 cases per 100,000 person-years [p-yrs]) and 729 males (3.9 per 100,000 p-yrs). (health.mil)
- In both sexes, overall rates of other disorders of adrenal gland and Cushing's syndrome were lower than for adrenal insufficiency but higher than for hyperaldosteronism, adrenogenital disorders, and adrenomedullary hyperfunction. (health.mil)
- 1 for adrenal insufficiency to 5.5 for androgenital disorders and Cushing's syndrome. (health.mil)
- The highest overall rates of adrenal insufficiency for males and females were among non-Hispanic white service members. (health.mil)
- In both sexes, the annual rates of adrenal insufficiency and other disorders of adrenal gland increased slightly during the 16-year period. (health.mil)
- The most common type of adrenal disorder was adrenal insufficiency. (health.mil)
- 1 Adrenal insufficiency occurs when the outer portion of the adrenal gland (adrenal cortex) does not produce an adequate amount of cortisol. (health.mil)
- 2,3 A diagnosis of primary adrenal insufficiency is established on the basis of a poor response to the adrenocorticotropic hormone (ACTH) stimulation test and an elevated blood ACTH level.4 Adrenal insufficiency is rare with prevalence estimates in Western countries ranging from 82 to 280 cases per million population. (health.mil)
- 3 Both primary and secondary adrenal insufficiency occur more frequently in adult women than in adult men and can be life threatening if untreated. (health.mil)
- Addison's disease, or adrenal insufficiency, is usually an autoimmune disease, resulting from a faulty immune response. (medicalnewstoday.com)
- A person may have primary or secondary adrenal insufficiency. (medicalnewstoday.com)
- People with certain genetic features and conditions have a higher risk of adrenal insufficiency. (medicalnewstoday.com)
- Schmidt's syndrome (thyroid and adrenal insufficiency). (prolekare.cz)
- Autoimmune adrenal insufficiency and autoimmune polyendocrine syndromes: autoantibodies, autoantigens, and their applicability in diagnosis and disease prediction. (prolekare.cz)
- Clinical, immunological, and genetic features of autoimmune primary adrenal insufficiency: observations from a Norwegian registry. (prolekare.cz)
- Cytotoxic T-lymphocyte antigen‑ 4 Ala17 polymorphism is a genetic marker of autoimmune adrenal insufficiency: Italian association study and meta‑analysis of European studies. (prolekare.cz)
- T cell responses to steroid cytochrome P450 21‑ hydroxylase in patients with autoimmune primary adrenal insufficiency. (prolekare.cz)
- Addison's disease, or primary adrenocortical insufficiency, is characterized by destruction of the adrenal cortex, resulting in the inability to produce cortisone when stimulated with the hormone ACTH. (akcchf.org)
- In 1855, Thomas Addison first described adrenal insufficiency, which was subsequently named after him. (medscape.com)
- Adrenal insufficiency can manifest as a defect anywhere in the hypothalamic-pituitary-adrenal axis. (medscape.com)
- Primary adrenal insufficiency is a result of destruction of the adrenal cortex. (medscape.com)
- Hyperpigmentation is generally noted in primary adrenal insufficiency associated with increased levels of corticotropin and MSH. (medscape.com)
- The expression of adrenal cortex antibodies (ACAs) in patients without symptoms of Addison disease represents a significant risk of progression to adrenal insufficiency. (medscape.com)
- Lamey PJ, Carmichael F, Scully C. Oral pigmentation, Addison's disease and the results of screening for adrenocortical insufficiency. (medscape.com)
- 1. Alexandraki KI, Sanpawithayakul K, Grossman A . Adrenal Insufficiency. (msdmanuals.com)
- In the United States, autoimmune destruction of the adrenal cortex most commonly causes chronic primary adrenal insufficiency (Addison disease). (medscape.com)
- Adrenal insufficiency is clinically apparent only after 90% or more of the cortex has been destroyed. (medscape.com)
- Healthy subjects rarely have antibodies against other endocrine glands, but this is common in patients with autoimmune adrenal insufficiency. (medscape.com)
Aldosterone7
- Addison's disease disrupts the production of aldosterone and cortisol, which can lead to severe complications. (medicalnewstoday.com)
- How Addison's disease works is that it tells antibodies to attach to the adrenal cortex and destroy the cells that make cortisol and aldosterone. (northwestpharmacy.com)
- In this case, Ang II could be acting to counterbalance hyponatremia by stimulating the secretion of aldosterone from the adrenal cortex, the major regulator of Na + reabsorption. (frontiersin.org)
- Aldosterone (Fig. 1), a mineralocorticoid produced in the cortex of the adrenal gland, plays key roles in the homeostasis of electrolytes, circulating blood volume and blood pressure regulation. (shimadzu.com)
- The aldosterone levels in blood are used for diagnosis of hypertensive diseases, such as primary hyperaldosteronism, diabetic nephropathy or nephritis interstitial, etc. (shimadzu.com)
- aldosterone secreting adenoma in one adrenal gland. (docsbay.net)
- The zona glomerulosa, the outer layer of the adrenal gland, produces aldosterone. (medscape.com)
Medulla5
- The adrenal glands consist of two layers: the medulla, which is the interior layer, and the cortex, the outer layer. (medicalnewstoday.com)
- A tumor in the adrenal medulla is called? (studystack.com)
- They will not have taken suppressive doses of glucocorticoids for 12 months, and will not have any known adrenal pathology, either of the cortex or medulla. (knowcancer.com)
- Overview of Adrenal Function The adrenal glands, located on the cephalad portion of each kidney (see figure ), consist of a Cortex Medulla The adrenal cortex and adrenal medulla each have separate endocrine functions. (msdmanuals.com)
- A thickened and fibrotic capsule is seen, and the cortex is completely destroyed, although some small clusters of adrenocortical cells surrounded by lymphocytes may exist, and the medulla is relatively spared. (medscape.com)
ACTH9
- Glucocorticoid excess caused by Cushing's syndrome, Cushing's disease, ectopic adrenocorticotropic hormone (ACTH) production, and exogenous glucocorticoid administration are all associated with muscle weakness and atrophy, with predominant proximal muscle involvement. (medscape.com)
- Hyperaldosteronism caused by pituitary or ectopic overproduction of ACTH, adrenal tumors, or exogenous corticosteroid administration has been associated with muscle weakness that is attributed to the associated hypokalemia. (medscape.com)
- Secondary adrenal deficiency can also develop when a person uses steroid drugs that affect the hypothalamus and the pituitary gland and prevent the body from producing ACTH. (medicalnewstoday.com)
- In healthy individuals, ACTH is the major stimulus for cortisol production and cellular growth of the adrenal cortex. (knowcancer.com)
- Normal or elevated ACTH levels can amplify this stimulus, leading to hypercortisolism and growth of the adrenal gland, a clinical condition recognized as Cushing's syndrome. (knowcancer.com)
- However in some cases, adrenal cortex is completely destroyed causing permanent iatrogenic hypoadrenocorticism resulting in intense stimulation of ACTH release, enhancing the growth rate of pituitary corticotrophs. (vin.com)
- Retinoic acid has been shown to be useful in decreasing corticotroph secretion and proliferation in rodent models and in dogs with Cushing's disease because it inhibits the transcriptional activity of POMC reducing ACTH levels in tumor corticotroph cells. (vin.com)
- Retinoic acid has an anti-proliferative action, inhibits ACTH and cortisol production highlighting the possibility of its use in dogs with Cushing's disease and Nelson's syndrome. (vin.com)
- Adrenocortical adenoma ïƒ encapsulated, expansile, yellow tumors, lipid-rich cells, adjacent adrenal cortex and contralateral adrenal glands are atrophic b/c of suppression of endogenous ACTH by high cortisol levels. (docsbay.net)
Thyroid7
- Diseases of the endocrine system, including the thyroid, parathyroid, adrenal gland, pituitary gland, and the islands of Langerhans of the pancreas, usually result in multisystem signs and symptoms. (medscape.com)
- In this article, you will learn about the impact of Covid-19 infection on children's adrenals and thyroid. (internationaljournals.co.in)
- To be diagnosed with most autoimmune diseases, the immune system has to destroy a significant amount of tissue (such as the brain, gut, or thyroid) to be officially diagnosed. (mindbodygreen.com)
- thyroid peroxidase antigens, which are associated with Hashimoto's disease. (mindbodygreen.com)
- Various autoantibodies (including antinuclear, thyroid antimicrosomal, antigastric parietal cell, anti-adrenal cortex, antismooth muscle, and antimitochondrial antibodies) have been detected in patients with lichen sclerosus. (medscape.com)
- Other endocrine glands like the thyroid, the pancreas and the adrenal cortex also have a role to play in causing amenorrhoea. (gynaeonline.com)
- Excess secretion of thyroid can cause Grave s disease. (managementstudyguide.com)
Portion of the adrenal gland1
- Provides tissue from the cortex portion of the adrenal gland. (fullscript.com)
Normal adrenal function2
- They were considered as having normal adrenal function. (academicjournals.org)
- 20. Betterle C, Coco G, Zanchetta R. Adrenal cortex autoantibodies in subjects with normal adrenal function. (prolekare.cz)
Adrenocortical1
- Kiseljak-Vassiliades K, Bancos I, Hamrahian A, Habra M, Vaidya A, Levine AC, Else T. American Association of Clinical Endocrinology Disease State Clinical Review on the Evaluation and Management of Adrenocortical Carcinoma in an Adult: a Practical Approach. (ucdenver.edu)
Destruction of the adrenal gland1
- Currently, in developed countries, Addison disease most commonly results from nonspecific autoimmune destruction of the adrenal gland. (medscape.com)
Glucocorticoid2
- [ 7 ] Interestingly, other disease states associated with increased glucocorticoid production such as sepsis, acidosis, and cancer, are also associated with muscle damage. (medscape.com)
- Cortisol (hydrocortisone, Compound F) is the major glucocorticoid produced in the adrenal cortex. (salimetrics.com)
Atrophy2
Bilateral adrenal hyperplasia1
- A 14-year old male Poodle dog developed Cushing's syndrome characterized by polyphagia, polyuria, polydipsia, abdomen enlargement, hypertension and bilateral adrenal hyperplasia on ultrasound. (vin.com)
Hypothalamic-pituitary-adrenal2
- Data from the Buffalo Cardio-Metabolic Occupational Police Stress (BCOPS) study provides information on the body systems (e.g., hypothalamic-pituitary-adrenal (HPA) axis and autonomic nervous system (ANS)) involved in responding to stressors and their possible relationship to CVD. (cdc.gov)
- The hypothalamic-pituitary-adrenal (HPA) axis is responsible for many body functions in mammals. (bvsalud.org)
Primary2
- Primary adrenal lymphoma presenting as Addison's disease. (medscape.com)
- The primary autoantigen associated with autoimmune Addison disease has been shown to be the microsomal autoantigen 21-hydroxylase (55 kilodalton). (medscape.com)
Endocrine1
- 21 hydroxylase (adrenal cortex) antigens, which are associated with autoimmune endocrine disorders. (mindbodygreen.com)
Congenital1
- Congenital heart diseases: principal alterations. (unibo.it)
Secretes1
- The adrenal gland secretes adrenalin or epinephrine and noradrenalin or norepinephrine which regulates the body changes which occur during situations of emergencies or emotional outbursts. (managementstudyguide.com)
Tumors1
- Tumors or cancers of the ADRENAL CORTEX. (ucdenver.edu)
Addison's Disease20
- Bergthorsdottir R, Leonsson-Zachrisson M, Oden A, Johannsson G. Premature mortality in patients with Addison's disease: a population-based study. (internationaljournals.co.in)
- What causes Addison's disease? (medicalnewstoday.com)
- In this article, we discuss the causes of Addison's disease. (medicalnewstoday.com)
- Addison's disease occurs when damage to the adrenal cortex disrupts hormone production in the adrenal glands. (medicalnewstoday.com)
- Indirectly, issues with the pituitary gland can cause Addison's disease. (medicalnewstoday.com)
- In Addison's disease, the immune system attacks cells of the adrenal glands, and they gradually stop working. (medicalnewstoday.com)
- The genes most likely linked with autoimmune Addison's disease belong to the human leukocyte antigen complex. (medicalnewstoday.com)
- Many people with autoimmune Addison's disease have another autoimmune condition, such as hypothyroidism , type 1 diabetes, or vitiligo. (medicalnewstoday.com)
- Estimated risk for developing autoimmune Addison's disease in patients with adrenal cortex autoantibodies. (prolekare.cz)
- 15. Winqvist O, Karlsson FA, Kämpe O. 21‑ Hydroxylase, a major autoantigen in idiopathic Addison's disease. (prolekare.cz)
- Steroid 21‑ hydroxylase is a major autoantigen involved in adult onset autoimmune Addison's disease. (prolekare.cz)
- Autoimmune Addison's disease and 21‑ hydroxylase. (prolekare.cz)
- Autoantibody epitope mapping of the 21‑ hydroxylase antigen in autoimmune Addison's disease. (prolekare.cz)
- Cortef (hydrocortisone) is a common oral corticosteroid prescribed to patients diagnosed with arthritis, some skin conditions, ulcerative colitis, certain cancers, Addison's disease, and those suffering from severe allergies. (northwestpharmacy.com)
- Cortef is specifically used to treat an autoimmune disorder called Addison's disease, which causes the body to attack the adrenal glands. (northwestpharmacy.com)
- Using both new and existing data, we propose to identify regions of the PWD genome that contain genes regulating the frequency of Addison's disease. (akcchf.org)
- Addison's disease, diffuse skin, and mucosal hyperpigmenation with subtle "flu-like" symptoms--a report of two cases. (medscape.com)
- Prat C, Vinas M, Marcoval J, Jucgla A. Longitudinal melanonychia as the first sign of Addison's disease. (medscape.com)
- Adams R, Hinkebein MK, McQuillen M, Sutherland S, El Asyouty S, Lippmann S. Prompt differentiation of Addison's disease from anorexia nervosa during weight loss and vomiting. (medscape.com)
- Adrenal magnetic resonance imaging in Addison's disease. (medscape.com)
Androgens2
- Situated between the glomerulosa and reticularis, the cells of the zona fasciculata synthesize and secrete glucocorticoids (such as 11-deoxycorticosterone, corticosterone, and cortisol), as well as small amounts of adrenal androgens and estrogens. (wikipedia.org)
- The inner most cortical layer, the zona reticularis produces adrenal androgens, as well as small amounts of estrogens and some glucocorticoids. (wikipedia.org)
Corticosteroid1
- CORTEF® Pharmacia & Upjohn Hydrocortisone Corticosteroid Action And Clinical Pharmacology: Hydrocortisone (cortisol) is a corticosteroid secreted by the adrenal cortex. (rxmed.com)
Antibodies3
- Some research suggests that antibodies can show up on labs several years before the diagnosis of many autoimmune diseases. (mindbodygreen.com)
- 21-Hydroxylase antibodies are markers of autoimmune Addison disease, which may manifest alone or as part of type I or type II polyglandular autoimmune syndrome. (medscape.com)
- A test result of 21-hydroxylase antibodies at 1 U/mL or higher indicates the presence of adrenal autoantibodies, which is consistent with Addison disease. (medscape.com)
Cortical2
- Adrenal cortical carcinoma (ACC) is a rare disease. (sooperarticles.com)
- Addison disease presents as adrenal cortical hypofunction along with splotchy or generalized bronzing of the mucosa and skin. (medscape.com)
MeSH2
- Adrenal Cortex Neoplasms" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (ucdenver.edu)
- 240 disease terms (MeSH) has been reported with AGTR1 gene. (cdc.gov)
Symptoms5
- Deficiency of steroids may cause Addison s disease and its symptoms could be appetite loss, increase in the fatigue level, irritability, anaemia, weakness, restlessness and skin darkening. (managementstudyguide.com)
- It causes various symptoms, including hypotension and hyperpigmentation, and can lead to adrenal crisis. (merckmanuals.com)
- You need to ensure that despite the disease, mobility is not hampered as the dog needs to stay active and not succumb to the symptoms. (greatpettips.com)
- Various approaches can be taken to alleviate the causes and symptoms of Cushing's disease. (greatpettips.com)
- Adrenal crisis (onset of severe symptoms) may be precipitated by acute infection. (msdmanuals.com)
Autoimmune disease6
- And according to the American Autoimmune-Related Diseases Association, 50 million Americans have a diagnosable autoimmune disease. (mindbodygreen.com)
- Read How Much of Autoimmune Disease Is Genetics vs. Environment? (mindbodygreen.com)
- Autoimmune Disease: There's enough body destruction to be diagnosed. (mindbodygreen.com)
- I find there are countless people in Stage 2 of the autoimmune spectrum: not sick enough to be labeled with an autoimmune disease but still damaged by the effects of autoimmune reactivity. (mindbodygreen.com)
- Why wait until you're sick enough to be labeled with an autoimmune disease? (mindbodygreen.com)
- In Portuguese Water Dogs (PWDs), this disease occurs with a frequency of 1-2 percent, and is a heritable autoimmune disease of low penetrance, caused by several interacting genes. (akcchf.org)
Chronic7
- [ 3 ] muscle weakness is also a common manifestation of chronic Addison disease . (medscape.com)
- Prolonged exposure to non-chemical stressors of both a psychological and physical nature (i.e., chronic stress ) as well as to various pollutants can play an etiological role in disease including cardiovascular disease (CVD). (cdc.gov)
- Ischemic heart disease: pathogenesis and morphological features of angina pectoris, chronic ischemic heart disease, myocardial infarction (timing of the progression of ischemic necrosis in myocardial infarction: evaluation methods). (unibo.it)
- Chronic restrictive diseases: classification of various types of histological patterns in interstitial lung disease (usual interstitial pneumonia, nonspecific interstitial pneumonia). (unibo.it)
- Non-neoplastic smoke-related lung disease: chronic obstructive pulmonary disease, small airways disease/respiratory bronchiolitis, Langerhans cell histiocytosis of the lung. (unibo.it)
- With more data and understanding of the human body, researchers have found ways to use the adrenal glands to support overall health and manage chronic conditions. (northwestpharmacy.com)
- With chronic disease, the glands can be small and sometimes difficult to locate. (medscape.com)
Glands to produce1
- Once excited, the PVN produces the neuropeptide corticotropin-releasing factor (CRF), which travels through the hypophyseal portal system and stimulates the adrenal and pituitary glands to produce many neurotransmitters. (bvsalud.org)
Cancers2
- Up to 15% of adrenal cancers may be caused by a genetic irregularity, but this is more common in children. (healthline.com)
- Deregulation of components involved in Wnt/β-catenin signaling has been implicated in a wide spectrum of diseases including a number of cancers and degenerative diseases. (chemdiv.com)
Hormone3
- Adrenal hormone excess or deficiency secondary to pituitary disorders may also be associated with skeletal muscle dysfunction. (medscape.com)
- Adrenal disorders can be caused by the production of too much or too little of a particular adrenal hormone. (health.mil)
- In some cases a stimulation test using a synthetic hormone designed to stimulate the adrenal gland is done. (supremepetfoods.com)
Secondary2
- Steroids secreted by the adrenal cortex influence the body metabolism, activity level, reaction to stressful situations and development of secondary sexual characteristics. (managementstudyguide.com)
- Schmidt syndrome-a combination of Addison disease with hypothyroidism secondary to Hashimoto thyroiditis and/or type 1 diabetes mellitus). (merckmanuals.com)
Outer3
- The adrenal cortex is the outer region and also the largest part of the adrenal gland. (wikipedia.org)
- This is the outer layer of the adrenal glands. (medicalnewstoday.com)
- It is caused by an increase in cancer in the adrenal cortex, the outer layer of the adrenal glands. (sooperarticles.com)
Neoplasms2
- This graph shows the total number of publications written about "Adrenal Cortex Neoplasms" by people in this website by year, and whether "Adrenal Cortex Neoplasms" was a major or minor topic of these publications. (ucdenver.edu)
- Below are the most recent publications written about "Adrenal Cortex Neoplasms" by people in Profiles. (ucdenver.edu)
Risk of adrenal1
- Risk of adrenal suppression: Can last 6-12 months after long-term, high dose use. (freezingblue.com)
Autoantibodies1
- The presence of adrenal cortex autoantibodies in the serum is associated with Addison disease. (medscape.com)
Result of autoimmune1
- the former is most often the result of autoimmune destruction of the adrenal cortex and the latter is generally the result of pituitary disease. (health.mil)
Circulating cortisol levels1
- In dogs with Cushing disease, the therapy with mitotane is highly effective, normalizing circulating cortisol levels resulting in prompt improvement of clinical signs. (vin.com)
Physiological2
- The adrenal glands regulate the psychological and physiological functioning of the body. (managementstudyguide.com)
- The adrenal cortex : physiological function and disease / Don H. Nelson. (who.int)
Addison9
- 1. Addison T. On the constitutional and local effects of disease of the suprarenal capsules. (prolekare.cz)
- Addison Disease Addison disease is an insidious, usually progressive hypofunctioning of the adrenal cortex. (merckmanuals.com)
- Multiple causes are known, and they may range from simple iatrogenic mechanisms, such as implantation of dental amalgam, to complex medical disorders, such as Peutz-Jeghers syndrome (PJS) and Addison disease. (medscape.com)
- The basis of Addison disease has dramatically changed since its initial description. (medscape.com)
- the most common infection was tuberculosis, which is still the predominant cause of Addison disease in developing countries. (medscape.com)
- The reported incidence of Addison disease is 5 or 6 cases per million population per year, with a prevalence of 60-110 cases per million population. (medscape.com)
- children have a high risk of progression compared with adults, in whom the expression of ACAs represents a 30% risk of progression to Addison disease. (medscape.com)
- Even with treatment, Addison disease may cause a slight increase in mortality. (msdmanuals.com)
- Addison disease, Peutz-Jeghers syndrome, and Laugier-Hunziker syndrome also appear in perioral and oral locations as pigmented macules. (medscape.com)
Bovine2
- Thorne Research Adrenal Cortex, made from bovine adrenal cortex tissue, supports healthy adrenal function by improving stamina and promoting an energetic feeling. (chroniclymediseasehelp.com)
- Adrenal Cortex, made from bovine adrenal cortex tissue, supports healthy adrenal function and helps combat adrenal fatigue. (chroniclymediseasehelp.com)
Centers for Diseas3
- Centers for Disease Control and Prevention. (cdc.gov)
- The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. (cdc.gov)
- The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. (cdc.gov)
Disorder1
- X-linked adrenoleukodystrophy (ALD) is a rare peroxisomal disorder that affects the white matter of the CNS, adrenal cortex, and testes (1-3). (ajnr.org)
Clinical4
- Furthermore, clinical markers (neurologic and cognitive scores) are relatively insensitive to early nervous system involvement and minor disease progression (9) . (ajnr.org)
- In this study, we evaluated the association between contrast enhancement on the T1-weighted spin-echo MR images of patients with X-linked ALD and disease progression based on clinical evaluation and MR imaging scores. (ajnr.org)
- Mycophenolate pharmacokinetics and association with response to acute graft-versus-host disease treatment from the Blood and Marrow Transplant Clinical Trials Network. (emmes.com)
- Clinical findings are noted after 90% of the adrenal cortex has been destroyed. (medscape.com)
Steroids1
- The precursor of steroids synthesized in the adrenal cortex is cholesterol that is stored in vesicles. (wikipedia.org)
Disorders4
- Crude overall rates of adrenal gland disorders among females tended to be higher than those of males, with female:male rate ratios ranging from 2. (health.mil)
- Among females, rates of Cushing's syndrome and other disorders of adrenal gland were higher among non-Hispanic white service members compared with those in other race/ethnicity groups. (health.mil)
- This is the first MSMR report of the incidence of adrenal disorders in the U.S. Armed Forces. (health.mil)
- 6). if you suffer from an airway disease or have breathing disorders due to other reasons. (who.int)
Infection2
- The aim of this study was to assess the adrenal cortex function according to the stage of infection in a group of HIV-infected patients in sub-Saharan Africa. (academicjournals.org)
- The immune system defends the body from disease, toxins, and infection. (medicalnewstoday.com)
Occur2
- Adrenal cancer is a rare cancer that can occur at any age. (healthline.com)
- introduced stress as a defensive response against stimulations and if these stimulations excess the body's adaptive mechanism, disabling diseases and even death may occur. (surgicalneurologyint.com)
Diagnosis6
- Survival rates for adrenal cancer depend on several factors, including the stage at diagnosis and the cancer's response to treatment. (healthline.com)
- Survival rates for adrenal cancer depend on the stage at diagnosis. (healthline.com)
- Granulomatous lung diseases: sarcoidosis and tuberculosis (and their differential diagnosis). (unibo.it)
- Years ago, some physicians began talking about a condition called "adrenal fatigue," while others claimed the diagnosis was bogus. (northwestpharmacy.com)
- Diagnosis of Cushings disease can be made in the same way as in cats and dogs: namely by checking a blood test to rule out diabetes and confirm an elevated steroid level. (supremepetfoods.com)
- Peutz-Jeghers syndrome has periorificial freckling along with hamartomatous intestinal polyps, and, as a differential diagnosis, Laugier-Hunziker syndrome presents with macular mucocutaneous hyperpigmentation and melanonychia with no known systemic disease association. (medscape.com)
Tissue4
- Extracts from adrenal cortex tissue can play a valuable role in supporting healthy adrenal glands and help maintain immune function and promote energy. (chroniclymediseasehelp.com)
- Thorne's Adrenal Cortex provides extracts of adrenal cortex tissue to help repair the adrenal glands. (chroniclymediseasehelp.com)
- Osteoporosis (OP) is a skeletal disease characterized by low bone mass and microarchitectural deterioration of bone tissue, leading to increased susceptibility to fractures (World Health Organization, 1994). (unm.edu)
- Common use cases include rheumatoid arthritis, ulcerative colitis, connective tissue disease, and organ transplants. (northwestpharmacy.com)
Acute2
- Acute restrictive diseases: diffuse alveolar damage (respiratory distress syndrome of adult and infant). (unibo.it)
- There are limited data as to the effectiveness of mycophenolate mofetil (MMF) plus high-dose corticosteroids for the treatment of acute graft-versus-host disease (aGVHD), and even less data regarding the pharmacokinetic disposition and exposure-response relationship of MMF in individuals with GVHD. (emmes.com)
Diabetes2
- In postpartum thyroiditis there is an association with other autoimmune diseases (e.g. lupus, vitiligo , Type 1 diabetes etc.) or a positive family history. (rxmed.com)
- Cushings disease occurs infrequently in hamsters and can be mistaken for diabetes (due to increased drinking) or cutaneous lymphoma (due to skin changes). (supremepetfoods.com)
Stress2
- Stress and lifestyle habits that deprive us of adequate rest and exercise, along with poor dietary habits can, over time, cause adrenal fatigue. (chroniclymediseasehelp.com)
- Incorporating epidemiological data in the evaluation obviates this need but requires methods able to quantify the levels of stress and their association with disease. (cdc.gov)
Infectious diseases3
- When infectious diseases in their own particular, it may not follow up to night. (lorenzopetrantoni.com)
- Exogenous or endogenous stimuli may affect the HPA response, changing an animal's mood, body temperature, appetite, hematopoietic organs, and leucocyte activity, among others, and facilitating the onset of infectious diseases, such as periodontitis 3-4 . (bvsalud.org)
- Background: Sexually transmitted infections (STIs) are among the most common infectious diseases in the world today. (bvsalud.org)