The effect of intracerebroventricular administration of somatostatin on prolactin and TSH release in rats

We investigated the effect of intracerebroventricular (icv) administration of somatostatin (SRIF) on prolactin (PRL) and thyroid-stimulating hormone (TSH) release in freely moving rats chronically cannulated with an atrial catheter. The plasma PRL levels were significantly elevated following the icv...

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Bibliographic Details
Published inJapanese journal of psychiatry and neurology Vol. 45; no. 4; p. 903
Main Authors Kaneda, H, Tanimoto, K, Shintani, T, Kakigi, T, Maeda, K
Format Journal Article
LanguageEnglish
Published Japan 01.12.1991
Subjects
Animals
Cerebral Ventricles
Female
Injections, Intraventricular
Male
Neurotransmitter Agents
Prolactin - blood
Prolactin - secretion
Rats
Research Design
Somatostatin - administration & dosage
Somatostatin - pharmacology
Thyrotropin - blood
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Summary:We investigated the effect of intracerebroventricular (icv) administration of somatostatin (SRIF) on prolactin (PRL) and thyroid-stimulating hormone (TSH) release in freely moving rats chronically cannulated with an atrial catheter. The plasma PRL levels were significantly elevated following the icv administration of 0.5 microgram SRIF. No further increase in PRL following the icv administration of SRIF were found in the rats in the course of repeated intravenous of injection of 5.0 mg/kg sulpiride, a specific D2 receptor antagonist. On the other hand, the injection of 5.0 micrograms SRIF resulted in no significant change in the plasma TSH levels. These results suggest that the effect of SRIF on PRL release was exerted through brain D2 receptors.
ISSN:0912-2036