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Topic: Trophic hormone


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  Kids.Net.Au - Encyclopedia > Trophic hormone
Trophic hormones are hormones that regulate the activity of endocrine glands.
Many trophic hormones are produced by the pituitary gland.
One example of a trophic hormone is the thyroid-stimulating hormone[?], produced by the pituitary, which stimulates the thyroid gland.
www.kids.net.au /encyclopedia-wiki/tr/Trophic_hormone   (64 words)

  
 cidau , Human growth hormone
Trophic hormones are anterior pituitary-secreted hormones that regulate the activity of various endocrine glands.
One example is the thyroid-stimulating hormone TSH produced by the anterior pituitary and stimulates the thyroid gland to secrete thyroid hormones.
Trophic hormones made and secreted by the anterior pituitary include: Growth hormone is not infact a trophic hormone as it does not meet the requirement of stimulating other endocrine glands.
www.cidau.org.uk   (374 words)

  
 Trophic hormone -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: )
Trophic hormones are (The secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect) hormones that regulate the activity of (Any of the glands of the endocrine system that secrete hormones directly into the bloodstream) endocrine glands.
Many tropic hormones are produced by the (The master gland of the endocrine system; located at the base of the brain) pituitary gland.
One example of a tropic hormone is the (Anterior pituitary hormone that stimulates the function of the thyroid gland) thyroid-stimulating hormone, produced by the pituitary, which stimulates the (Located near the base of the neck) thyroid gland.
www.absoluteastronomy.com /encyclopedia/t/tr/trophic_hormone.htm   (116 words)

  
 Juvenile-onset Panhypopituitarism - The Merck Veterinary Manual
Closure of the epiphyses is delayed as long as 4 yr depending on the severity of the hormonal insufficiency and is caused by deficiencies of both thyroid-stimulating hormone and growth hormone.
In those animals with an equivocal change in basal hormone level, the responses to challenge by exogenous thyrotropin or adrenocorticotropin are subnormal, owing to the hypoplasia or atrophy of the thyroid gland and adrenal cortex.
Basal levels of circulating canine growth hormone are reported to be detectable but low (normal range: 1.75 ± 0.17 mg/mL) in pituitary dwarfs and fail to increase after a provocative test for secretion via clonidine injection (30 µg/kg, IV) as they do in normal dogs.
www.merckvetmanual.com /mvm/htm/bc/40506.htm   (577 words)

  
 Bio-identical Hormones and Aging - Human Growth Hormone
Hormones with less familiar names, like melatonin and thymosin, are also not as abundant in older as in younger adults.
A hormone that has attracted the interest of many researchers is DHEA (short for dehydroepiandrosterone), which is abundant in youth but begins to decline in humans at about age 30.
Hormones are aided and abetted by an arsenal of other substances that also stimulate or modulate cell activities.
www.antiagingresearch.com /hormones_and_aging.shtml   (1203 words)

  
 Spartanburg SC | GoUpstate.com | Spartanburg Herald-Journal
Tropic hormones are anterior pituitary-secreted hormones that regulate the activity of various endocrine glands.
The release of tropic hormones is controlled by a class of hypothalamic hormones called releasing hormones, produced in the hypothalamus.
For example, Luteinizing hormone releasing hormone (LHRH) from the hypothalamus stimulates the release of LH from the anterior pituitary.
www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=trophic_hormone   (191 words)

  
 eMedicine - Hypopituitarism (Panhypopituitarism) : Article by James R Mulinda
The trophic hormone level may appear to be within the reference range with a corresponding subphysiologic target hormone level.
Hormonal studies should be performed in pairs of target gland and their respective stimulatory pituitary hormone for proper interpretation.
These hormones are used for replacement therapy in hypogonadism associated with a deficiency or absence of endogenous testosterone or estrogen.
www.emedicine.com /MED/topic1137.htm   (2120 words)

  
 Learning Difficulties Described
Patients with ADD are also known to have a substantially higher incidence of thyroid hormone resistance resulting in impaired performance on an auditory discrimination task.
T3, the active form of thyroxine (the hormone produced by the thyroid), is very difficult to measure accurately.
It is also perhaps notable that noradrenaline is trophic to neural tissue and that lower levels of noradrenalin may contribute to poor brain development.
www.opening-the-door.com /lear_dif.htm   (775 words)

  
 Online Health @ to Z
The amount of hormones produced by each gland is carefully balanced.
Most endocrine glands are controlled by trophic (stimulating) hormones secreted by the pituitary gland.
The pituitary gland, in turn, is controlled by hormones secreted by the hypothalamus in the brain.
www.sehosp.org /health/ADULT/endocrin   (157 words)

  
 Hormones - Pharmacy and Drugs
Perhaps the most well known hormones are those produced by the endocrine glands but nearly every organ system and tissue type in the body produces hormones.
Hormone actions can include the stimulation or inhibition of growth, starting or stopping cell death, activation, or suppression of the immune system, regulation of metabolism, and preparation for a new activity or phase of life, or even the production and release of other hormones, among others.
Hormone secretion can be stimulated or inhibited by other hormones; plasma concentrations of ions or nutrients, as well as binding globulins; neurons and mental activity; environmental changes; and one special group of hormones called trophic hormones that stimulate the hormone production of other endocrine glands.
www.pharmacy-and-drugs.com /Hormones   (583 words)

  
 Israel Hanukoglu - Lab achievements
Trophic hormone regulation of gene expression in adrenal cortex
Whereas the renal form of PHA is milder and is inherited as an autosomal dominant trait, the multi-system form carries a high rate of mortality and is inherited as an autosomal recessive trait.
In most steroid hormone resistance syndromes a mutation in the steroid receptor was shown to be responsible for the disease.
www.science.co.il /hi/achieve.asp   (1222 words)

  
 Addison's Disease - Patient UK
A hormone is a chemical which is made in one part of the body but passes into the bloodstream and has effects on other parts of the body.
Cortisol is a steroid hormone and is vital for health.
The cause of this is probably due to the change in hormones which can affect the pigment cells in the skin.
www.patient.co.uk /showdoc/27000110   (1597 words)

  
 Twinkle, twinkle little StAR, how we wonder what you are -- Estabrook and Rainey 93 (24): 13552 -- Proceedings of the ...
Exposure of cells from steroidogenic tissues to trophic peptide hormones results in a rapid increase in the rate of steroid
to the hypothesis that trophic hormone action was mediated by
Another piece of the puzzle was added by the observation that trophic hormones mediate the acute stimulation of steroidogenesis
www.pnas.org /cgi/content/full/93/24/13552   (1901 words)

  
 Mechanisms for pituitary tumorigenesis: the plastic pituitary -- Melmed 112 (11): 1603 -- Journal of Clinical ...
are involved in pituitary hormone deficiencies with hypoplasia.
Trophic cells are depicted with transcription factors known to determine cell-specific human or murine gene expression.
Absence of mutations in the growth hormone (GH)-releasing hormone receptor gene in GH-secreting pituitary adenomas.
www.jci.org /cgi/content/full/112/11/1603   (6871 words)

  
 Trophic Effects of Androgen: Receptor Expression and the Survival of Laryngeal Motor Neurons after Axotomy -- ...
Trophic Effects of Androgen: Receptor Expression and the Survival of Laryngeal Motor Neurons after Axotomy -- Pérez and Kelley 16 (21): 6625 -- Journal of Neuroscience
To determine whether changes in androgen receptor (AR) expression are associated with trophic actions of androgens, we have examined the laryngeal motor nucleus (N. IX-X) of Xenopus laevis 1 and 5 months after section of the laryngeal nerve.
Five months after axotomy, both the total number of cells and the number of AR mRNA-expressing cells are severely decreased in the axotomized N. DHT treatment mitigates the cell loss in N. IX-X induced by prolonged axotomy; the effect includes maintenance of AR mRNA-expressing cells.
www.jneurosci.org /cgi/content/short/16/21/6625   (544 words)

  
 Revolutionary Natural Progesterone Creams! Menopause-PMS Treatment-Symptoms Menapause
There are serious side effects associated with estrogen supplementation, such as an increase for endometrial cancer and breast cancer that are not associated with natural progesterone.
Progesterone is one of two main hormones the other being estrogen made by the ovaries of menstruating women.
When a woman's monthly cycle is functioning correctly, estrogen is the dominant hormone during the first two weeks of the menstrual cycle.
www.antiaging-skin-care-products.com /health_products_ghc/natural_progesterone_creams.htm   (1315 words)

  
 Glossary of Prostate Cancer Related Terms, P and Q - Prostate Cancer Research Institute
PAP (prostatic acid phosphatase): an enzyme or biomarker secreted by prostate cells associated with a higher probability of disease outside the prostate when levels are 3.0 or higher; PAP elevations suggest that the disease is not
It is similar to a steroid hormone made by the adrenal glands in the body.
Proteins are fundamental components of all living cells and include many substances, such as enzymes, hormones, and antibodies, that are necessary for the proper functioning of an organism.
www.prostate-cancer.org /resource/gloss_pq.html   (2751 words)

  
 Maximizing Efficacy of Endocrine Tests: Importance of Decision-focused Testing Strategies and Appropriate Patient ...
Interrelationships of target and trophic hormone concentrations for defining hyperfunction vs hypofunction and primary vs secondary disease or hormone resistance.
example is growth hormone as the trophic stimulus for the liver
Demir A, Alfthan H, Stenman UH, Voutilainen R. A clinically useful method for detecting gonadotropins in children: assessment of luteinizing hormone and follicle-stimulating hormone from urine as an alternative to serum by ultrasensitive time-resolved immunofluorometric assays.
www.clinchem.org /cgi/content/full/45/8/1323   (3880 words)

  
 Effect of pyridoxine on human hypophyseal trophic hormone release: a possible stimulation of hypothalamic dopaminergic ...
Effect of pyridoxine on human hypophyseal trophic hormone release: a possible stimulation of hypothalamic dopaminergic pathway -- Delitala et al.
Effect of pyridoxine on human hypophyseal trophic hormone release: a possible stimulation of hypothalamic dopaminergic pathway
levels of immunoreactive growth hormone GH and significant decrease of
jcem.endojournals.org /cgi/content/abstract/42/3/603   (230 words)

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