Pituitary and serum concentrations of prolactin and GH in Snell dwarf mice.

Proceedings of the Society for Experimental Biology and Medicine
Y N SinhaW P VANDERLAAN

Abstract

Secretions of prolactin and GH in dwarf mice were studied using homologous radioimmunoassays. Blood samples from adult male and femal dw/dw mice were collected by orbital puncture and by decapitation. Compared to related normals (+/?), pituitary concentrations of GH and prolactin were very low in dw/dw mice, the concentrations of prolactin being more scarce than those of GH. Prolactin and GH concentrations were also lower in sera of dw/dw mice, but the relative differences appeared sex-dependent: serum GH was more reduced in males than in females while serum prolactin was more depressed in females. The data confirm earlier indications of deficiencies in the circulating levels of prolactin and GH in dwarf mice and suggest that the hypoactivity of these hormones may be crucial to some of the anomalies found in this mutant.

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