these last results suggest that the amplication of the hydrolysis of phosphatidylcholine by prostaglandin e2 and prostaglandin f2 alpha , with the consequent release of arachidonic acid ( the substrate of prostaglandin synthesis ) is likely a positive-feedback regulation of the arachidonic acid-prostaglandin cascade .
C0012472
prostaglandin e2
C0033554
prostaglandin