Prostaglandin receptor site: evidence for an essential role in the action of luteinizing hormone.

A dose-response relation was established between prostaglandins and formation of adenosine 3',5'-monophosphate in the mouse ovary. The prostaglandin antagonist, 7-oxa-13-prostynoic acid, blocked the stimulatory effect of prostaglandin E(1), prostaglandin E(2), and luteinizing hormone on adenosine 3',5'-monophosphate formation in a competitive manner. Kinetic studies made it possible to suggest that there is a single luteinizing-hormone-related prostaglandin receptor in mouse ovaries, and that activation of this prostaglandin receptor is an essential requirement in the action of luteinizing hormone to stimulate adenosine 3',5'-monophosphate formation and steroidogenesis.