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Topic: Thyrotropin-releasing hormone

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Hormone - Wikipedia, the free encyclopedia Hormone actions vary widely, but can include stimulation or inhibition of growth, induction or suppression of Hormone secretion can be stimulated and inhibited by: In many cases, one hormone may regulate the production and release of other hormones. en.wikipedia.org /wiki/Hormone

Thyrotropin-Releasing Hormone, Focus on Basic Neurobiology TRH levels in secretory cells of the hypothalamus must be maintained at concentrations sufficient to ensure functional integrity of the hypothalamic–pituitary–thyroid (HPT) axis, whereas extrahypothalamic levels of the peptide are likely to be responsive to other behavioral and physiological demands. TRH may inhibit its own enzymatic removal by enhancing translocation of protein kinase C from cytosol to plasma membrane, where it can inactivate pyroglutamyl peptidase II by phosphorylation of the enzyme. TRH was not the first peptide found in the central nervous system (CNS). www.acnp.org /G4/GN401000048/CH048.html

Thyroid-Stimulating Hormone Thyroid-stimulating hormone, also known as thyrotropin, is secreted from cells in the anterior pituitary called thyrotrophs, finds its receptors on epithelial cells in the thyroid gland, and stimulates that gland to synthesize and release thyroid hormones. Secretion of thyroid-releasing hormone, and hence, TSH, is inhibited by high blood levels of thyroid hormones in a classical negative feedback loop. Thyroid-releasing hormone is secreted by hypothalamic neurons into hypothalamic-hypophyseal portal blood, finds its receptors on thyrotrophs in the anterior pituitary and stimulates secretion of TSH. arbl.cvmbs.colostate.edu /hbooks/pathphys/endocrine/hypopit/tsh.html

Dorlands Medical Dictionary releasing hormones,   hormones elaborated in one structure that cause the release of hormones from another structure, such as those from the hypothalamus that act on the adenohypophysis. follicle-stimulating hormone,  (FSH)   one of the gonadotropic hormones of the adenohypophysis, a glycopeptide of approximately 30,000 daltons that stimulates the growth and maturation of ovarian follicles, stimulates estrogen secretion, promotes the endometrial changes characteristic of the first portion (proliferative phase) of the mammalian menstrual cycle, and stimulates spermatogenesis in the male. The term is applied to substances of established chemical identity, whereas substances of unknown chemical structure are called releasing factors (see under factor). www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_h_14zPzhtm

MSN Encarta - Search Results - thyrotropin-releasing hormone MSN Encarta - Search Results - thyrotropin-releasing hormone Drugs known as gonadotropin-releasing hormone (GnRH) agonists are being investigated as birth control options for men and women. Research has shown that the hormonal activity of the anterior lobe is controlled by chemical messengers sent from the hypothalamus through tiny blood... encarta.msn.com /thyrotropin-releasing_hormone.html

Encyclopedia article on Thyrotropin-releasing hormone [EncycloZine] The sequence of TRH was first determined and the hormone was synthesized by Roger Guillemin and Andrew V. Schally in 1969. TRH is produced by the hypothalamus and travels across the median eminence to the pituitary via the pituitary portal system. The presence of TRH can also be detected in other parts of the brain, such as the gastrointestinal system and pancreatic islets. encyclozine.com /Thyrotropin-releasing_hormone

Protein kinase C is necessary for recovery from the thyrotropin-releasing hormone-induced r-ERG current reduction in GH3 rat anterior pituitary cells -- Gómez-Varela et al. 547 (3): 913 -- The Journal of Physiology Online Abundant evidence accumulated over more than a decade indicates that regulation of ether-à-go-go -related (ERG) channel activity by the hypothalamic neuropeptide thyrotropin-releasing hormone (TRH) constitutes an important point of control of electrical activity (and hence of intracellular Ca levels and the secretory process) in anterior pituitary cells (Barros et al. The biochemical cascade linking activation of phospholipase C-coupled thyrotropin-releasing hormone (TRH) receptors to rat ERG (r-ERG) channel modulation was studied in situ using perforated-patch clamped adenohypophysial GH cells and pharmacological inhibitors. It also indicates that a quantification of the hormonal effects on r-ERG can be performed by subtracting the current remaining in the presence of E-4031 from that elicited in control conditions and comparing it with the difference between the TRH- and E-4031-resistant currents. jp.physoc.org /cgi/content/full/547/3/913

Real Time Visualization of Agonist-mediated Redistribution and Internalization of a Green Fluorescent Protein-tagged Form of the Thyrotropin-releasing Hormone Receptor -- Drmota et al. 273 (37): 24000 -- Journal of Biological Chemistry The abbreviations used are: TRH, thyrotropin releasing hormone; TRHR, thyrotropin-releasing hormone receptor; GFP, green fluorescent protein; VSV, vesicular stomatitis virus; PBS, phosphate-buffered saline; KRH, Krebs-Ringer-Hepes. VSV-TRHR-GFP was constructed from the long isoform of the rat TRH receptor as detailed under "Experimental Procedures." The COOH-terminal amino acid derived from the TRHR was altered from Ile to Leu, and a two-amino acid (Gly-Ala) linker was inserted between the two elements of the fusion protein to facilitate construction. TRH was able to overcome the blockade of internalization caused www.jbc.org /cgi/content/full/273/37/24000

Yano N, Luo LG. Effect of Thyrotropin Releasing Hormone (TRH) on Gene Expressions in Rat Pancreas: Approach by Microarray Hybridization. JOP. J Pancreas (Online) 2004; 5(4):193-204. [Full text] Thyrotropin releasing hormone (TRH) was originally identified as a hypothalamic factor with a key role in regulation of the thyroid axis [ 1, 2, 3, 4, 5, 6, 7 ]. TRH also enlarged pancreas and increased pancreatic DNA content but deletion of TRH gene expression caused hyperglycemia in mice, suggesting that TRH may play a critical role in pancreatic development; however, the biological mechanisms of TRH in the adult pancreas remains unclear. TRH significantly enhanced expressions of transcription proteins, oncogenes and tumor suppressors, stress response proteins, metabolism enzymes, apoptosis-associated proteins and DNA binding and chromatin proteins while suppressing immune system proteins, trafficking/targeting proteins and intracellular transducers/effectors/modulators (Tables 2 and 3). www.joplink.net /prev/200407/06.html

Diagnostic Handbook Formerly used as a test for borderline hyperthyroidism but now replaced by sensitive TSH estimation. In hyperthyroidism, the TSH response to TRH is reduced. www.diagnostic.co.nz /hbook/5cec3b6.htm

Publications - PsychoFarmacology Consulting Services Thyrotropin releasing hormone: Antagonism of pentobarbital in rodents. Antagonism of ethanol narcosis by thyrotropin releasing hormone. Effects of thyrotropin releasing hormone (TRH) on the actions of pentobarbital and other centrally acting drugs. www.jerrycott.com /Publications.html

thyrotropin releasing hormone - General Practice Notebook Thyrotropin releasing hormone is released by the hypothalamus in response to low thyroid hormone; it stimulates the release of thyroid stimulating hormone from the anterior pituitary. Oxbridge Solutions Ltd® is an independent company owned by the authors which does not receive income from any other organisation or individual. The information provided herein should not be used for diagnosis or treatment of any medical condition. www.gpnotebook.com /cache/-1268056016.htm

Thyroid function in neurosomatic disorders: stimulation of trigeminal nerve activity with thyrotropin releasing hormone TRH is a neuropeptide in addition to its role in stimulating the release of thyroid-stimulating hormone, which I shall discuss shortly. Thyroid hormone is made by the thyroid gland in two forms, T4, and tyrosine molecule that has four iodides attached to it, and T3, a tyrosine molecule that has three iodides attached to it. TRH nasal spray seems to be safe and effective and has the potential in certain patients to ameliorate all symptoms very rapidly. www.ncf-net.org /forum/99gold.htm

The Anti Aging Hormone Shop Growth Hormone Stimulators & DHEA & 5HTP We also provide information on sources of prescription hormones, books by leading authorities on anti-aging hormones and a one stop shopping center for what we believe to be the best products from several different companies within the industry. Furthermore, in no event shall The Hormone Shop LLC's total cumulative liability exceed The Hormone Shop LLC net profit on any specific product, sample or consulation giving rise to the liability. Saliva Testing, Saliva, Hormones in saliva, non-invasive testing, Menopause, hormones, Progesterone, testosterone, estrone, estriol, estradiol, DHEA, DHEAS, dihydrotestosterone, melatonin, cortisol, IGF-1test, tests, menopause, hormones menopause, HRT, menopause hormones, Women's Health, Lab Services, Reference Lab, Aging, Natural Hormones, Perimenopause, Hormone Testing, Hormone Imbalance, Osteoporosis, Heart Disease, PMS, Infertility, and Stress. www.thehormoneshop.com

The Biology of pro-Thyrotropin-Releasing Hormone-Derived Peptides -- Nillni and Sevarino 20 (5): 599 -- Endocrine Reviews TRH yields are not achieved in all, or even most, tissues. TRH, additional CPs must also be able to process pro-TRH to Diagrammatic representation of the proposed processing model of rat pro-TRH to non-TRH peptides and TRH, and the postulated involvement of PC1 and PC2 as determined from our studies (for further details see Section II.A–D). edrv.endojournals.org /cgi/content/full/20/5/599

4-BIBLIOGRAPHY Kakucska I, Rand W, Lechan RM: Thyrotropin-releasing hormone (TRH) gene expression in the hypothalamic paraventricular nucleus is dependent upon feedback regulation by both triiodothyronine and thyroxine. Ridgway EC, Kourides IA, Chin WW, Cooper DS, Maloof F: Augmentation of pituitary thyrotrophin response to thyrotrophin releasing hormone during subphysiological tri-iodothyroinine therapy in hypothyroidism. Silva JE, Larsen PR: Contributions of plasma triiodothyronine and local thyroxine monodeiodination to triiodothyronine to nuclear triiodothyronine receptor saturation in pituitary, liver, and kidney of hypothyroid rats: Further evidence relating saturation of pituitary nuclear triiodothyronine receptors and the acute inhibition of thyroid-stimulating hormone release. www.thyroidmanager.org /Chapter4/4-biblio.htm

HORMONE - Definition adjuvant, adrenosterone, Allen-Doisy hormone, androgen, androsterone, autacoid, bile, carminative, chalone, cholecystokinin, chondrotrophic hormone, corticosterone, counterirritant, dehydrocorticosterone, digestive secretion, emmenagogue, endocrine, expectorant, gall, gastric juice, insulin, intestinal juice, maturative, mucus, pancreatic juice, progesterone, prostatic fluid, rheum, salivary secretion, semen, sperm, tears, thyroxin, vasodilator, vitamin Chem.) A chemical substance formed in one organ and carried in the circulation to another organ on which it exerts a stimulating effect ; thus, according to Starling, the gastric glands are stimulated by a hormone from the pyloric mucous membrane. A biochemical substance that is produced by a specific cell or tissue and causes a change or activity in a cell or tissue located elsewhere in an organism. www.hyperdictionary.com /dictionary/Hormone

The Thyrotropin-Releasing Hormone (TRH) Hypothesis of Homeostatic Regulation: Implications for TRH-Based Therapeutics -- Gary et al. 305 (2): 410 -- Journal of Pharmacology And Experimental Therapeutics The functions of thyrotropin-releasing hormone (TRH) in the central nervous system (CNS) can be conceptualized as performed The Thyrotropin-Releasing Hormone (TRH) Hypothesis of Homeostatic Regulation: Implications for TRH-Based Therapeutics -- Gary et al. The Thyrotropin-Releasing Hormone (TRH) Hypothesis of Homeostatic Regulation: Implications for TRH-Based Therapeutics jpet.aspetjournals.org /cgi/content/abstract/305/2/410

Thyrotropin-Releasing Hormone Is Induced in the Left Ventricle of Rats With Heart Failure and Can Provide Inotropic Support to the Failing Heart -- Jin et al. 109 (18): 2240 -- Circulation Thyrotropin-Releasing Hormone Is Induced in the Left Ventricle of Rats With Heart Failure and Can Provide Inotropic Support to the Failing Heart -- Jin et al. Key Words: hormones • heart failure • myocardial infarction • inotropic agents TRH is specifically induced in the heart after MI and that it www.circulationaha.org /cgi/content/abstract/109/18/2240

Regulation of hypothalamic prohormone convertases 1 and 2 and effects on processing of prothyrotropin-releasing hormone -- Sanchez et al. 114 (3): 357 -- Journal of Clinical Investigation TRH in these mice was depressed by at least 75% compared with Integrated optical density using NIH Image software for PC1, PC2, and TRH in the 2 brain areas was analyzed. TRH and the secretion of TSH ( 41, 42). www.jci.org /cgi/content/full/114/3/357

TRH (Thyrotrophin Hormone Releasing hormone) polyclonal antibodies from Research Diagnostics Inc Description/Specificity Thyrotropin Releasing Hormone is produced in the hypothalamus and stimulates the release of Thyroid Stimulating Hormone (TSH) in the pituitary. TRH (Thyrotrophin Hormone Releasing hormone) polyclonal antibodies from Research Diagnostics Inc Research Diagnostics Inc offers a wide line of antibodies. www.researchd.com /miscabs/pro11170.htm

Lectures, Presentations and symposia by ETC Doctors IMD Jackson at International Conference on “Thyrotropin-releasing Hormones and Related Peptides” on the dawning of a new millenium, Island of Kos, Greece, June 5-7, 1998. Does thyroid hormone have a role as adjunctive therapy in depression? IMD Jackson and A Geller in Breakout Session at Seminar on “Dealing with Type 2 Diabetes: New Science, New Strategies”, sponsored by Professional Postgraduate Services, Newport Marriott, Newport, Rhode Island, November 22, 1997. www.etcri.com /symposia.htm

BLAST Search Results 699 0.0 dbjD17469.1RATTRHRA Rat mRNA for thyrotropin releasing ho... 100 2e-19 gbU60178.1SSU60178 Sus scrofa growth hormone secretagogue... 87 2e-15 gbM73481.1HUMGRPR Human gastrin releasing peptide recepto... www.chickest.udel.edu /orthomouse/m5.html

The Biology of pro-Thyrotropin-Releasing Hormone-Derived Peptides -- Nillni and Sevarino 20 (5): 599 -- Endocrine Reviews Thyrotropin-Releasing Hormone Is Induced in the Left Ventricle of Rats With Heart Failure and Can Provide Inotropic Support to the Failing Heart Regulation of hypothalamic prohormone convertases 1 and 2 and effects on processing of prothyrotropin-releasing hormone Deletion of the Nhlh2 Transcription Factor Decreases the Levels of the Anorexigenic Peptides {alpha} Melanocyte-Stimulating Hormone and Thyrotropin-Releasing Hormone and Implicates Prohormone Convertases I and II in Obesity edrv.endojournals.org /cgi/content/abstract/20/5/599

Gonadotropin-Releasing Hormone and Gonadotropin-Releasing Hormone Receptor Messenger Ribonucleic Acids Expression in Nontumorous and Neoplastic Pituitaries -- Sanno et al. 82 (6): 1974 -- Journal of Clinical Endocrinology & Metabolism 1989 Gonadotropin release by clinically nonfunctioning and gonadotroph pituitary adenomas in vivo and in vitro: relation to sex and effects of thyrotropin-releasing hormone, gonadotropin-releasing hormone and bromocriptine. 1983 Gonadotropin and alpha subunit secretion by human functionless pituitary adenomas in cell culture: long term effects of luteinizing hormone releasing hormone and thyrotropin releasing hormone. 1981 Studies of immunoreactive gonadotropin releasing hormone (GnRH) in rat anterior pituitary. jcem.endojournals.org /cgi/content/full/82/6/1974   (5251 words)

The Rat Gonadotropin-Releasing Hormone Receptor Internalizes via a {beta}-Arrestin-Independent, but Dynamin-Dependent, Pathway: Addition of a Carboxyl-Terminal Tail Confers {beta}-Arrestin Dependency -- Heding et al. 141 (1): 299 -- Endocrinology Homo- and Hetero-oligomerization of Thyrotropin-releasing Hormone (TRH) Receptor Subtypes. Constitutive and Agonist-dependent Homo-oligomerization of the Thyrotropin-releasing Hormone Receptor. The Rat Gonadotropin-Releasing Hormone Receptor Internalizes via a {beta}-Arrestin-Independent, but Dynamin-Dependent, Pathway: Addition of a Carboxyl-Terminal Tail Confers {beta}-Arrestin Dependency -- Heding et al. endo.endojournals.org /cgi/content/abstract/141/1/299   (1102 words)

UCLA Biocybernetics Laboratory A.E. Pekary, R. Stephens, M. Simard, X-P. Pang, V. Smith, J. DiStefano, III, J. Hershman, "Release of Thyrotropin and Prolactin by a Thyrotropin-Releasing Hormone (TRH) Precursor, TRH-Gly: Conversion to TRH is Sufficient for In Vivo Effects", Neuroendocrinology, 52:618-625, 1990. DiStefano, III and D. Fisher, ``Peripheral Distribution and Metabolism of the Thyroid Hormones: a Primarily Quantitative Assessment,'' in International Encyclopedia of Pharmacology and Therapeutics, Section 101, The Thyroid: Physiology and Treatmet of Disease J. J.J. DiStefano, III and D. Feng, "Distribution, Metabolism and Biliary and Circulatory Fluxes of Thyroid Hormones in Liver, Intestinal Wall, Luminal Contents and Kidney of the Rat," The American Thyroid Assn. biocyb.cs.ucla.edu /publications.html   (1102 words)

Thyroid-Stimulating Hormone Thyroid-stimulating hormone, also known as thyrotropin, is secreted from cells in the anterior pituitary called thyrotrophs, finds its receptors on epithelial cells in the thyroid gland, and stimulates that gland to synthesize and release thyroid hormones. Secretion of thyroid-releasing hormone, and hence, TSH, is inhibited by high blood levels of thyroid hormones in a classical negative feedback loop. Thyroid-releasing hormone is secreted by hypothalamic neurons into hypothalamic-hypophyseal portal blood, finds its receptors on thyrotrophs in the anterior pituitary and stimulates secretion of TSH. arbl.cvmbs.colostate.edu /hbooks/pathphys/endocrine/hypopit/tsh.html   (1102 words)

Thyrotropin-releasing hormone Thyrotropin-releasing hormone ( TRH) is a tripeptide hormone that stimulates the release of TSH and prolactin by the anterior pituitary. The sequence of TRH was first determined and the hormone was synthesized by Roger Guillemin and Andrew V. Schally in 1969. Set home page · Bookmark site · Add search www.sciencedaily.com /encyclopedia/thyrotropin_releasing_hormone   (1102 words)

Ontogeny of the subcellular compartmentalization of thyrotropin releasing hormone and luteinizing hormone releasing hormone in the rat hypothalamus. Ontogeny of the subcellular compartmentalization of thyrotropin releasing hormone and luteinizing hormone releasing hormone in the rat hypothalamus. Thyrotropin releasing hormone (TRH) and LH releasing hormone (LHRH) in the gradient fractions were quantified by radioimmunoassay. It is concluded that 1) the nature of the hypothalamic subcellular compartmentalization of TRH and LHRH is age dependent, 2) the compartmentalization of each peptide in neonatal hypothalami differs from that in the adults, and 3) the development of the mature profile of subcellular compartmentalization of TRH and LHRH proceeds asynchronously. www.arclab.org /medlineupdates/abstract_402259.html   (1102 words)

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