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Biogenic amine control of growth hormone secretion in the fetal and neonatal rat


The development of the hypothalamic-pituitary axis for growth hormone (GH) secretion has been studied in the rat fetus and in the neonate 4, 24, 48 and 72 h after birth. Injections of the serotonin blocker cyproheptadine (Cypro) and a catecholamine, dopamine (DA), each led to reductions in the level of serum GH in 21 to 22 day fetuses and in neonates up to 3 days after birth. The O-methylated derivative of dopamine, dimethoxyphenylethylamine (DMPEA), did not alter serum GH levels from those seen in saline-treated control animals. These results indicate that biogenic amines exert control over GH secretion in the fetus, close to term, and in early neonatal period. They suggest that this control is similar to that seen in the adult rat and in man and that such control may operate through serotonin receptors.

Type Journal
ISBN 0028-3835 (Print)
Authors Stuart, M.;Lazarus, L.;Smythe, G. A.;Moore, S.;Sara, V. :
Published Date 1976-01-01
Published Volume 22
Published Issue 4
Published Pages 337-42
Status Published in-print
URL link to publisher's version