Melatonin Inhibits Prostaglandin E Release From the Medial Basal Hypothalamus of Pinealectomized Rats

Abstract
The effects of pinealectomy and of melatonin administration on prostaglandin E synthesis in the medial basal hypothalamus were studied in male rats. Melatonin treatment significantly decreased prostaglandin E release from the medial basal hypothalamus in pinealectomized rats. Apparently, melatonin modulates hypothalamo-hypophyseal function, at least in part, via inhibition of hypothalamic prostaglandin synthesis.