[The effect of thyroliberin on the nonapeptidergic hypothalamo-hypophyseal neurosecretory system in rats (in-vivo and in-vitro research)].

A single i.p. injection of the thyrotropin-releasing hormone (TRH) decreased the plasma vasopressin in rats. A direct effect of the TRH involved a diminishing of the nucleoli size in oxytocin cells. The data obtained prove a direct effect of the TRH on the release and secretion processes in the nonapeptidergic cells in the paraventricular and supraoptic nuclei.