PMID: 490076Aug 1, 1979Paper

Effect of chicken hypothalamus on prolactin and growth hormone secretion in male chickens

The Journal of Endocrinology
S HarveyN J Bolton

Abstract

The effects of a chicken hypothalamic extract (HE) on the secretion of prolactin and growth hormone (GH) in vivo have been investigated by radioimmunoassay in the domestic fowl. Different i.v. doses of HE (0.25--25 HE equivalents/kg body weight) had no effect on GH secretion in conscious or anaesthetized cockerels. In both groups of birds the concentration of plasma prolactin was significantly increased within 10 min of administration of the extract. Extracts of other brain tissues (cerebral cortex, cerebellum and medulla oblongata) had no stimulatory effect on prolactin or GH secretion. Release of both prolactin and GH by dispersed pituitary cells and by hemipituitary glands in vitro was enhanced following incubation with HE (5 hypothalami equivalents/ml) or with single whole hypothalami respectively. Other brain tissues (cerebellum, optic lobes and medulla oblongata) had no effect on the concentration of prolactin or GH released by incubated hemipituitary glands.

Citations

Jun 29, 1981·Life Sciences·C G Scanes, S Harvey
Jan 1, 1983·Comparative Biochemistry and Physiology. C, Comparative Pharmacology and Toxicology·T R HallS Harvey
Dec 1, 1983·General and Comparative Endocrinology·S C FehrerM E El Halawani
Nov 1, 1984·General and Comparative Endocrinology·T R HallA Chadwick
Feb 1, 1983·General and Comparative Endocrinology·M R Hall, A R Goldsmith
Jun 1, 1984·General and Comparative Endocrinology·F C BuonomoC G Scanes
Dec 1, 1984·The Journal of Experimental Zoology·M E El HalawaniB M Hargis

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