Abstract
Rabbit ovarian follicles were incubated without stimulation, with LH and with LH + an inhibitor of steroid biosynthesis. Formation of prostaglandins PGE and PGF and of progesterone and estradiol was measured in these incubates. It was found that aminoglutethimide phosphate (AGP) inhibited the LH stimulated biosynthesis of both prostaglandins and steroids. However U 30870 and Metyrapone, while completely inhibiting the LH stimulated biosynthesis of progesterone and estradiol respectively, had no effect on the formation of prostaglandins. Further, the inhibition of prostaglandin formation by AGP could not be reversed by exogenous steroids. It, therefore, appears that the effect of AGP on prostaglandin biosynthesis may not be related to its effect on steroid biosynthesis. However, the response of rabbit follicles to AGP is contrary to that reported for rat follicles and indicates different control mechanisms for prostaglandin formation in the follicles of the two species.
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