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Topic: Luteinizing hormone


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  Luteinizing hormone - Wikipedia, the free encyclopedia
Luteinizing hormone (LH) is a hormone synthesized and secreted by gonadotropes in the anterior lobe of the pituitary gland.
The luteinizing hormone beta-subunit gene is localized in the LHB/CGB gene cluster on chromosome 19q13.32.
It is regulated by the gonadotropin releasing hormone from the hypothalamus.
en.wikipedia.org /wiki/Luteinizing_hormone   (1053 words)

  
 Menstrual Cycle: Biology of the Female Reproductive System: Merck Manual Home Edition
The menstrual cycle is regulated by hormones: luteinizing hormone and follicle-stimulating hormone, which are produced by the pituitary gland, and estrogen and progesterone, which are produced by the ovaries.
A menstrual cycle is regulated by the complex interaction of hormones: luteinizing hormone and follicle-stimulating hormone, which are produced by the pituitary gland, and the female sex hormones estrogen and progesterone, which are produced by the ovaries.
Luteinizing hormone stimulates the dominant follicle to bulge from the surface of the ovary and finally rupture, releasing the egg.
www.merck.com /mmhe/sec22/ch241/ch241e.html   (1138 words)

  
 Luteinizing hormone test Encyclopedia of Medicine - Find Articles
The luteinizing hormone (LH) test is a test of the blood or urine to measure the level of luteinizing hormone (lutropin).
Lutenizing hormone is a hormone released by the pituitary gland, a small gland at the base of the brain.
Another term for luteinizing hormone, this hormone stimulates the development and release of the egg from the ovary.
www.findarticles.com /p/articles/mi_g2601/is_0008/ai_2601000850   (627 words)

  
 Luteinizing hormone level (via CobWeb/3.1 planetlab2.isi.jhu.edu)   (Site not responding. Last check: 2007-11-06)
About endometriosis uterina pregnancy hormone level or hcg hormone level Bio-identical hormones have the same chemical structure as hormones that are made by the human body needs coronary heart disease risk hormone level during pregnancy, thyroid hormone level.
Hormone replacement therapy (HRT) should be to provide an adequate supply of the deficient hormone in a form that is as close as possible to that which the body originally produced, therefore resulting in normal physiologic effects.
Hormone replacement therapy (HRT) should be to provide an adequate supply of the deficient hormone in a form that is as close as possible to that which the body originally produced, therefore resulting in normal physiologic effects (leptin antibody) type 2 diabetes recipe Every person is unique.
bioidentical.at-a-parade-float-supplies.com.cob-web.org:8888 /luteinizing-hormone-level.php   (540 words)

  
 eMedicine - Luteinizing Hormone Deficiency : Article by Louis A Dainty, MD
The incidence of luteinizing hormone deficiency is higher (10-15%) in subsets of patients who are infertile and have had habitual abortions.
This may be the common endpoint of abnormal patterns of LH secretion, lower levels of LH and follicle-stimulating hormone (FSH) at the time of the ovulatory surge, low levels of FSH in the follicular phase of the menstrual cycle, or, finally, decreased responsiveness of the endometrium to progesterone.
Luteinizing hormone deficiency is not an emergency requiring hospitalization or transfer.
www.emedicine.com /med/topic1341.htm   (2781 words)

  
 Luteinizing and Follicle Stimulating Hormones
Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are called gonadotropins because stimulate the gonads - in males, the testes, and in females, the ovaries.
As describef for thyroid-simulating hormone, LH and FSH are large glycoproteins composed of alpha and beta subunits.
The alpha subunit is identical in all three of these anterior pituitary hormones, while the beta subunit is unique and endows each hormone with the ability to bind its own receptor.
arbl.cvmbs.colostate.edu /hbooks/pathphys/endocrine/hypopit/lhfsh.html   (708 words)

  
 Other Pituitary Gland Disorders / Cushing's Help and Support
For example, if only luteinizing hormone is missing (isolated luteinizing hormone deficiency), the testes develop and produce sperm, because these functions are controlled by follicle-stimulating hormone, but the testes do not produce enough testosterone.
Testosterone is the hormone that stimulates the development of male secondary sexual characteristics, such as deepening of the voice, growth of facial hair, and maturation of the penis.
Measuring the level of growth hormone is not always useful or indicative of a deficiency because the body produces the hormone in short bursts that cause its level to rise and fall quickly.
www.cushings-help.com /pituitary.htm   (669 words)

  
 Luteinizing Hormone
A luteinizing hormone test measures the amount of luteinizing hormone (LH) in a sample of blood or urine.
Luteinizing hormone and follicle-stimulating hormone levels rise and fall together during the monthly menstrual cycle.
LH levels depend on a person's age and stage of sexual development, and, in a woman, on the phase of her menstrual cycle.
www.webmd.com /hw/womens_conditions/hw8017.asp   (1429 words)

  
 Recombinant Luteinizing Hormone. Is it necessary?
Stimulation of endogenous surge of luteinizing hormone with gonadotrophin-realizing hormone analog after ovarian stimulation for in vitro fertilization.
Autocrine role of estrogens in the augmentation of luteinizing hormone receptor formation in cultured rat granulosa cells.
Chappel SC, Howles C. Reevaluation of the roles of luteinizing hormone and follicle stimulating hormone in the ovulatory proccess.
www.gfmer.ch /Endo/PGC_network/Recombinant_luteinizing_hormone_Pou.htm   (3290 words)

  
 Luteinizing hormone receptor database of the department of Endocrinology & Reproduction of the Erasmus University ...
Luteinizing hormone receptor database of the department of Endocrinology and Reproduction of the Erasmus University in Rotterdam the Netherlands
This is the luteinizing hormone (LH) receptor mutation database
The androgens are converted to estrogens, the hormone that directs the growth of follicles, by the aromatase enzyme in the granulosa cells.
www2.eur.nl /fgg/endov/lhr.html   (1145 words)

  
 Luteinizing hormone releasing hormone antagonist - Patent 4992421   (Site not responding. Last check: 2007-11-06)
The present invention relates to novel luteinizing hormone releasing hormone antagonists ##STR1## The invention also relates to pharmaceutical compositions containing such compounds and to the use of such compounds for suppressing levels of sex hormones in male or female mammals.
Luteinizing Hormone Releasing Hormone, known as LHRH or GnRH, is a decapeptide that is produced in the hypothalamus and binds to a receptor on the pituitary gland causing the release of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) from the pituitary.
Paradoxically, chronic doses of these agonists suppress the levels of LH and steroid hormones resulting in an inhibition of the pituitary-gonadal axis characterized by a decrease of the levels of sex steroids and the atrophy of accessory sex organs.
www.freepatentsonline.com /4992421.html   (4366 words)

  
 Hypopituitarism: Pituitary Gland Disorders: Merck Manual Home Edition
Deficiencies of luteinizing hormone and follicle-stimulating hormone can also occur in Kallmann's syndrome, in which people may also have a cleft lip or palate (see Birth Defects: Facial Defects), are color-blind, and are unable to sense smells.
Because the levels of luteinizing hormone and follicle-stimulating hormone fluctuate with the menstrual cycle, their measurement in women may be difficult to interpret.
For example, people deficient in thyroid-stimulating hormone are given thyroid hormone, those deficient in corticotropin are given adrenocortical hormones such as hydrocortisone, and those deficient in luteinizing hormone and follicle-stimulating hormone are given estrogen, progesterone, or testosterone.
www.merck.com /mmhe/ag/print/sec13/ch162/ch162c.html   (1392 words)

  
 Luteinizing hormone   (Site not responding. Last check: 2007-11-06)
Luteinizing hormone application Information source about Luteinizing hormone.
The analysis of blood of the LH measures the amount of the hormone luteinizing (LH).
The LH is a hormone of the protein secretada by previous the pituitaria gland.
hormone.shopping112.com /luteinizing-hormone.htm   (916 words)

  
 ALZET® Bibliography - Administration of Luteinizing Hormone and LHRH
P1010 Schuiling,G.A., Moes,H., Koiter,T.R. Effect of clomiphene citrate on the in vitro release of LH and FSH by the pituitary gland of the long-term ovariectomized rat pretreated with LRH or with LRH and oestradiol benzoate.
P0506 Schuiling,G.A., Moes,H., Koiter,T.R. Desensitization of the pituitary gland induced in vivo by luteinizing hormone-releasing hormone (LRH) or by the LRH-analogue buserelin does not affect the autonomous secretion of luteinizing hormone and follicle stimulating hormone as observed in vitro.
P0003 Bowers,C.Y., Folkers,K. Contraception and inhibition of ovulation by minipump infusion of the luteinizing hormone releasing hormone, active analogs and antagonists.
www.alzet.com /bibliography/LH.php   (3475 words)

  
 BioMed Central | Full text | Melatonin effects on luteinizing hormone in postmenopausal women: a pilot clinical trial ...   (Site not responding. Last check: 2007-11-06)
The duration of the nocturnal prolactin elevation increased, but it was evident from the mean plots that the peak values were higher during short nights, and therefore, it is unclear what the effect of long nights were on total daily prolactin secretion [17].
Almost all of the others withdrew before or shortly after signing consent, mostly because their symptoms were not suitable, because they did not wish to adhere to the protocol, or because inspection of arm veins suggested that establishment of an intravenous sampling line might be difficult.
Urinary luteinizing hormone results are shown in Figure 2.
www.biomedcentral.com /1472-6874/6/8   (4123 words)

  
 Luteinizing Hormone-Releasing Hormone (LHRH) Neurons Maintained in Hypothalamic Slice Explant Cultures Exhibit a Rapid ...   (Site not responding. Last check: 2007-11-06)
Gore AC, Roberts JL (1995) Regulation of gonadotropin-releasing hormone gene expression in the rat during the luteinizing hormone surge.
Lei ZM, Rao CV (1994) Novel presence of luteinizing hormone/human chorionic gonadotropin (hCG) receptors and the down-regulating action of hCG on gonadotropin-releasing hormone gene expression in immortalized hypothalamic GT1-7 neurons.
Levine JE, Ramirez VD (1980) In vivo release of luteinizing hormone-releasing hormone estimated with push-pull cannulae from the mediobasal hypothalami of ovariectomized, steroid-primed rats.
www.jneurosci.org /cgi/content/full/17/24/9481   (6788 words)

  
 Immunohistochemical Evidence That Follicle-Stimulating Hormone and Luteinizing Hormone Reside in Separate Cells in the ...
Immunohistochemical Evidence That Follicle-Stimulating Hormone and Luteinizing Hormone Reside in Separate Cells in the Chicken Pituitary -- Proudman et al.
Immunohistochemical Evidence That Follicle-Stimulating Hormone and Luteinizing Hormone Reside in Separate Cells in the Chicken Pituitary
Dacheux F. Subcellular localization of gonadotropic hormones in pituitary cells of the castrated pig with the use of pre- and post-embedding immunocytochemical methods.
www.biolreprod.org /cgi/content/full/60/6/1324   (3080 words)

  
 A mathematical model of luteinizing hormone release from ovine pituitary cells in perifusion -- Heinze et al. 275 (6): ...
Effects on plasma luteinizing hormone and follicle-stimulating hormone of varying the frequency and amplitude of gonadotropin-releasing hormone pulses in ovariectomized ewes with hypothalamo-pituitary disconnection.
Influence of the characteristics of pulses of gonadotrophin releasing hormone on the dynamics of luteinizing hormone release from perifused sheep pituitary cells.
Radioimmunoassay for rat luteinizing hormone using anti-ovine LH serum and radioiodinated ovine luteinizing hormone.
ajpendo.physiology.org /cgi/content/full/275/6/E1061   (5261 words)

  
 Divergent Effects of Leptin on Luteinizing Hormone and Insulin Secretion Are Dose Dependent -- Zieba et al. 228 (3): ...
Leptin gene expression, circulating leptin, and luteinizing hormone pulsatility are acutely responsive to short-term fasting in prepubertal heifers: relationships to circulating insulin and insulin-like growth factor I. Biol Reprod63:127–133, 2000.
Nitric oxide mediated leptin-induced luteinizing hormone-releasing hormone (LHRH) and LHRH and leptin-induced LH release from the pituitary gland.
Insulin enhancement of luteinizing hormone and follicle stimulating hormone release by cultured pituitary cells.
www.ebmonline.org /cgi/content/full/228/3/325   (3675 words)

  
 Leptin and Luteinizing Hormone Concentrations in Pigs
Serum concentrations of leptin, insulin and luteinizing hormone (LH) were determined by radioimmunoassay.
It has been shown to decrease feed intake in pigs (2, 3) and other species (1) and affect the secretion of several hormones including luteinizing hormone (LH) (4).
The present results suggest that this model is useful for the study of nutritional effects on LH secretion and possible relationship with metabolic hormones such as leptin and insulin.
mark.asci.ncsu.edu /SwineReports/2001/06physwhis.htm   (1555 words)

  
 Ovarian Steroid Hormone Modulation of the Acute Effects of Cocaine on Luteinizing Hormone and Prolactin Levels in ...
Ovarian Steroid Hormone Modulation of the Acute Effects of Cocaine on Luteinizing Hormone and Prolactin Levels in Ovariectomized Rhesus Monkeys -- Mello et al.
Plasma hormone and cocaine levels (nanograms per milliliter) are shown on the left ordinates.
Mendelson JH, Sholar MB, Siegel AJ, and Mello NK (2001) Effects of cocaine on luteinizing hormone in women during the follicular and luteal phases of the menstrual cycle and in men.
jpet.aspetjournals.org /cgi/content/full/308/1/156   (6049 words)

  
 Fertility in luteinizing hormone receptor-knockout mice after wild-type ovary transplantation demonstrates redundancy ...
Fertility in luteinizing hormone receptor-knockout mice after wild-type ovary transplantation demonstrates redundancy of extragonadal luteinizing hormone action -- Pakarainen et al.
The effect of a null mutation in the follicle-stimulating hormone receptor gene on mouse reproduction.
Fields, M.J., and Shemesh, M. Extragonadal luteinizing hormone receptors in the reproductive tract of domestic animals.
www.jci.org /cgi/content/full/115/7/1862   (4740 words)

  
 Effects of Luteinizing Hormone-Releasing Hormone on Plasma Cocaine Levels in Rhesus Monkeys -- Mendelson et al. 289 ...
Toivola PTK, Bridson WE and Robinson JA (1978) Effect of luteinizing hormone-releasing-hormone on the secretion of luteinizing hormone, follicle-stimulating hormone, and testosterone in adult male rhesus monkeys.
Veldhuis JD and Johnson ML (1988) In vivo dynamics of luteinizing hormone secretion and clearance in man: Assessment by deconvolution mechanics.
Veldhuis JD, Johnson ML and Dufau ML (1989) Physiological attributes of endogenous bioactive luteinizing hormone secretory bursts in man: Assessment by deconvolution analysis and in vitro bioassay of LH.
jpet.aspetjournals.org /cgi/content/full/289/2/791   (6265 words)

  
 Medical Dictionary: Luteinizing hormone - WrongDiagnosis.com
Luteinizing hormone: A gonadotropin hormone synthesized by the anterior lobe of the pituitary that stimulates synthesis and secretion of testosterone and estrogen, and ovulation of mature follicles on the ovary.(NCI)
Luteinizing hormone : major gonadotropin secreted by the adenohypophysis; luteinizing hormone regulates steroid production by the interstitial cells of the gonads; the preovulatory luteinizing hormone surge in females induces ovulation and subsequent luteinization of the follicle.
The description of Luteinizing hormone may also be used for the following terms:
www.wrongdiagnosis.com /medical/luteinizing_hormone.htm   (250 words)

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