Results 311 to 320 of about 241,755 (405)
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Calcium Antagonists and Hormone Release: Effect of Nifedipine on Luteinizing Hormone-Releasing Hormone and Thyrotropin-Releasing Hormone-Induced Pituitary Hormone Release

The Journal of Clinical Endocrinology & Metabolism, 1983
In vitro evidence suggests that calcium is involved in the release of anterior pituitary hormones. Therefore, we studied the effect of the slow calcium channel blocker or calcium antagonist nifedipine on the FSH and LH responses to LRH and the TSH and PRL responses to TRH in vivo. Nine normal male subjects were studied on two occasions, and nifedipine
Struthers, A. D.   +4 more
openaire   +5 more sources

Selectivity of Melatonin Pituitary Inhibition for Luteinizing Hormone-Releasing Hormone

Neuroendocrinology, 1982
The pineal indole melatonin suppresses the neonatal rat luteinizing hormone (LH) and follicle-stimulating hormone (FSH) responses to LH-releasing hormone (LHRH), as shown in previous studies from this laboratory. We show in this study that the melatonin inhibition is a selective effect and is not due to general inhibition of pituitary function.
Jeanne E. Martin, Carol Sattler
openaire   +4 more sources

Luteinizing Hormone-Releasing Hormone in Human Pituitary Blood

Obstetrical & Gynecological Survey, 1978
✓ Luteinizing hormone (LH) and LH-releasing hormone (LHRH) were measured by radioimmunoassay in blood samples collected from the pituitary gland during transsphenoidal surgery in 19 patients. Detectable levels of LHRH were present in 12 patients. Wide fluctuations of LHRH were seen in sequential samples collected at 10-minute intervals, suggesting a ...
Peter W. Carmel   +3 more
openaire   +4 more sources

Modelling the Pituitary Response to Luteinizing Hormone‐Releasing Hormone

Journal of Neuroendocrinology, 2004
AbstractThe pituitary response to luteinizing hormone‐releasing hormone (LHRH) is steroid‐dependent and varies throughout the reproductive cycle, but the rapid rise in pituitary sensitivity on the day of the ovulation‐inducing LH surge is due to a ‘self‐priming’ effect of exposure to LHRH that results in a potentiation of pituitary responsiveness 35–40 
David Brown, Gareth Leng, S. Scullion
openaire   +3 more sources

Effects of cholinergic stimulation on pituitary hormone release

Psychoneuroendocrinology, 1982
Abstract Physostigmine was infused into human volunteers to assess the effect of central cholinergic stimulation on memory and on neuroendocrine function. Methscopolamine bromide, a peripheral anticholinergic agent, was given simultaneously. The lower dose of physostigmine (1.0 mg) produced no change in AVP, cortisol, melatonin, GH or LH in those ...
Henry G. Friesen   +5 more
openaire   +3 more sources

Reproductive hormones in aging men. II. Basal pituitary gonadotropins and gonadotropin responses to luteinizing hormone-releasing hormone.

Journal of Clinical Endocrinology and Metabolism, 1982
Although basal serum LH and FSH levels have been shown to increase with age in men, there is evidence that aging may impair pituitary gonadotropin secretion to some extent.
S. Harman   +3 more
semanticscholar   +1 more source

Cocaine effects on luteinizing hormone-releasing hormone-stimulated anterior pituitary hormones in female rhesus monkey.

Journal of Clinical Endocrinology and Metabolism, 1990
The effects of acute cocaine administration on synthetic LHRH-stimulated anterior pituitary hormones (LH, FSH, and PRL) were studied in 6 female rhesus monkeys during the follicular phase of the menstrual cycle (days 4-7).
N. Mello   +3 more
semanticscholar   +1 more source

Quantitative immunocytochemistry of pituitary receptors for luteinizing hormone-releasing hormone

Cell and Tissue Research, 1975
In Araldite sections of male rat pituitaries, stained after embedding by the unlabeled antibody enzyme method with antisera to native luteinizing hormone-releasing hormone (LH-RH) or LH-RH azo-conjugated to bovine serum albumin, localization is confined mainly to the interior of the large, and to a lesser extent to that of the small, secretion granules
John P. Petrali, Ludwig A. Sternberger
openaire   +3 more sources

Calcium antagonists and hormone release. II. Effects of verapamil on basal, gonadotropin-releasing hormone- and thyrotropin-releasing hormone-induced pituitary hormone release in normal subjects.

Journal of Clinical Endocrinology and Metabolism, 1980
Although it has been well established that Ca2+ plays an essential role in the release of several hormones, very little is known of the interactions between Ca2+ and secretagogues in the process of pituitary hormone release.
A. Barbarino, L. De Marinis
semanticscholar   +1 more source

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