scholarly journals Cysteamine administration in lambs grazing on mountain pastures: Effects on the body weight, antioxidant capacity, thyroid hormones and growth hormone secretion

2021 ◽  
Author(s):  
Borhan Shokrollahi ◽  
Abdullah Fazli ◽  
Salim Morammazi ◽  
Nazila Saadati ◽  
Hafiz Ishfaq Ahmad ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Thyroid Hormones ◽  
Antioxidant Capacity ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
The Body

Influence of catecholamines, prostaglandins and thyroid hormones on growth hormone secretion by chicken pituitary cells in vitro

1990 ◽  
Vol 7 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Dan J. Donoghue ◽  
Frank M. Perez ◽  
Bruce S.A. Diamante ◽  
Sasha Malamed ◽  
Colin G. Scanes
Keyword(s):  
Growth Hormone ◽  
Thyroid Hormones ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
Pituitary Cells

Effect of actively immunizing sheep against growth hormone-releasing hormone or somatostatin on spontaneous pulsatile and neostigmine-induced growth hormone secretion

1995 ◽  
Vol 144 (1) ◽  
pp. 83-90 ◽  
Author(s):  
E Magnan ◽  
L Mazzocchi ◽  
M Cataldi ◽  
V Guillaume ◽  
A Dutour ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
Physiological Role ◽  
Gh Secretion ◽  
Igf I ◽  
Plasma Gh ◽  
Hypophysial Portal

Abstract The physiological role of endogenous circulating GHreleasing hormone (GHRH) and somatostatin (SRIH) on spontaneous pulsatile and neostigmine-induced secretion of GH was investigated in adult rams actively immunized against each neuropeptide. All animals developed antibodies at concentrations sufficient for immunoneutralization of GHRH and SRIH levels in hypophysial portal blood. In the anti GHRH group, plasma GH levels were very low; the amplitude of GH pulses was strikingly reduced, although their number was unchanged. No stimulation of GH release was observed after neostigmine administration. The reduction of GH secretion was associated with a decreased body weight and a significant reduction in plasma IGF-I concentration. In the antiSRIH group, no changes in basal and pulsatile GH secretion or the GH response to neostigmine were observed as compared to controls. Body weight was not significantly altered and plasma IGF-I levels were reduced in these animals. These results suggest that in sheep, circulating SRIH (in the systemic and hypophysial portal vasculature) does not play a significant role in pulsatile and neostigmine-induced secretion of GH. The mechanisms of its influence on body weight and production of IGF-I remain to be determined. Journal of Endocrinology (1995) 144, 83–90

Photoperiodic control of growth hormone secretion and body weight in rams

1988 ◽  
Vol 5 (3) ◽  
pp. 247-255 ◽  
Author(s):  
Bruno Barenton ◽  
Jean-Paul Ravault ◽  
Claire Chabanet ◽  
Agnes Daveau ◽  
Jean Pelletier ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
Photoperiodic Control

Reduced Growth Hormone Secretion in Turner Syndrome: Is Body Weight a Key Factor?

1994 ◽  
Vol 41 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Stefano Cianfarani ◽  
Fabrizio Vaccaro ◽  
Anna Maria Pasquind ◽  
Sabatino A. Marchione ◽  
Franca Passeri ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Turner Syndrome ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
Key Factor

scholarly journals Effect of Thyroid Hormones on Growth Hormone Secretion in Broiler Chickens

1986 ◽  
Vol 65 (2) ◽  
pp. 384-390 ◽  
Author(s):  
COLIN G. SCANES ◽  
ROBERT J. DENVER ◽  
SAMUEL J. BOWEN
Keyword(s):  
Growth Hormone ◽  
Thyroid Hormones ◽  
Broiler Chickens ◽  
Hormone Secretion ◽  
Growth Hormone Secretion

A Novel Growth Hormone Secretagogue-1a Receptor Antagonist That Blocks Ghrelin-Induced Growth Hormone Secretion but Induces Increased Body Weight Gain

2005 ◽  
Vol 81 (5) ◽  
pp. 339-349 ◽  
Author(s):  
Heather A. Halem ◽  
John E. Taylor ◽  
Jesse Z. Dong ◽  
Yeelana Shen ◽  
Rakesh Datta ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Weight Gain ◽  
Receptor Antagonist ◽  
Body Weight Gain ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
Growth Hormone Secretagogue

Influence of thyroid hormones on the regulation of growth hormone secretion

1995 ◽  
Vol 133 (6) ◽  
pp. 646-653 ◽  
Author(s):  
Andrea Giustina ◽  
William B Wehrenberg
Keyword(s):  
Growth Hormone ◽  
Thyroid Hormones ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
Regulation Of Growth

scholarly journals Testosterone modulates growth hormone secretion at the hypothalamic but not at the hypophyseal level in the adult male rhesus monkey

2000 ◽  
Vol 165 (2) ◽  
pp. 337-344 ◽  
Author(s):  
SS Rizvi ◽  
GF Weinbauer ◽  
M Arslan ◽  
CJ Partsch ◽  
E Nieschlag
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Rhesus Monkeys ◽  
Hormone Secretion ◽  
Plasma Concentrations ◽  
Growth Hormone Secretion ◽  
Qualitative Change ◽  
Gh Secretion ◽  
Significant Difference ◽  
Male Rhesus

We investigated a possible modulation of growth hormone (GH) secretion by testosterone by measuring the growth hormone releasing hormone (GHRH)-stimulated and N-methyl-d,l-aspartic acid (NMA)-induced GH secretion in adult rhesus monkeys. Intact, orchidectomized and testosterone-substituted (testosterone enanthate 125 mg/week, i.m. for 5 weeks) orchidectomized monkeys (n=5) were used in the study. GHRH (25 microg/kg body weight) or NMA (15 mg/kg body weight) was infused through a Teflon cannula implanted in the saphenous vein. Sequential blood samples were collected 30-60 min before and 60 min after the injection of the neurohormone or the drug at 10-20-min intervals. All bleedings were carried out under ketamine hydrochloride anaesthesia (initial dose 5 mg/kg body weight i.m., followed by 2.5 mg/kg at 30-min intervals). The plasma concentrations of GH, testosterone and oestradiol (E(2)) were determined by using specific assay systems. Administration of GHRH elicited a significant increase in GH secretion in all three groups of animals. There was no significant difference in the responsiveness of pituitary somatotrophs to exogenous GHRH challenges between intact and orchidectomized monkeys and testosterone replacement in orchidectomized animals did not significantly alter the GHRH-induced GH response. The responsiveness of hypothalamic GHRH neurones apparently did undergo a qualitative change after orchidectomy, as GH response to NMA was less in orchidectomized animals than in intact monkeys. The responsiveness of GHRH neurones to exogenous NMA was restored and even potentiated when orchidectomized monkeys were treated with testosterone. Taken together, these findings suggest that testosterone does not affect the sensitivity of the pituitary somatotrophs to GHRH but stimulates the secretion of GH by modulation of the NMDA drive to GHRH neurones.

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