1993
DOI: 10.1677/joe.0.1360245
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Growth hormone (GH) suppression of catecholamine turnover in the chicken hypothalamus: implications for GH autoregulation

Abstract: GH administered centrally or peripherally inhibits basal or secretagogue-induced GH secretion in domestic fowl. Since the release of pituitary GH is neurally regulated by the hypothalamus, GH autoregulation may be mediated by changes in the content or metabolism of hypothalamic monoamines. When chicken GH (500 micrograms/kg body weight) was injected i.v. into laying hens, tissue catecholamine (adrenaline, noradrenaline and dopamine) concentrations in the preoptic area (POA) and medial basal hypothalamus (MBH) … Show more

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Cited by 9 publications
(12 citation statements)
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“…This is consistent with reports that synthesis and release of catecholamines are reduced after bolus GH administration both in the rat (Stern et al 1975) and in the chicken (Lea & Harvey 1993). EP has been shown to increase FI in the chicken (Denbow et al 1981).…”
Section: Discussionsupporting
confidence: 92%
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“…This is consistent with reports that synthesis and release of catecholamines are reduced after bolus GH administration both in the rat (Stern et al 1975) and in the chicken (Lea & Harvey 1993). EP has been shown to increase FI in the chicken (Denbow et al 1981).…”
Section: Discussionsupporting
confidence: 92%
“…Hypophysectomy significantly decreases NPY mRNA levels, and GH treatment restores these levels to those of intact rats (Chan et al 1996). Hypothalamic monoamines are reported to be affected by GH, and may participate in GH autoregulation (Lea & Harvey 1993). The present experiment was designed to investigate the dose-response nature of GH on voluntary FI, and the possible involvement of NPY and monoamines in this process.…”
Section: Introductionmentioning
confidence: 99%
“…with recombinant chicken GH (rcGH; Amgen, Thousand Oaks, California, USA) (100 µg/kg body weight) or with 0·9% w/v NaCl vehicle (1 ml/kg) and tissues were collected 2 h later. The administration of GH by this route results in a rapid increase in circulating GH, which peaks after 40 min and declines exponentially thereafter (Harvey 1993). For comparative purposes, tissues were similarly collected 2 h after GH administration from birds that had been injected with GH once daily for 14 days.…”
Section: Influence Of Exogenous Ghmentioning
confidence: 99%
“…Membrane binding sites for oGH have been demonstrated in the chicken hypothalamus (Attardo & Harvey 1990) and similar intracerebroventricular (i.c.v.) injections of oGH have previously been shown to alter brain neurochemistry in domestic fowl (Lea & Harvey 1993). The birds were killed after 24 h and the liver and brain extracted and quick-frozen in liquid nitrogen.…”
Section: Influence Of Exogenous Ghmentioning
confidence: 99%
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