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Biology of Reproduction, Vol 13, 158-162, Copyright © 1975 by Society for the Study of Reproduction
5-3
-Hydroxysteroid Dehydrogenase and
Cholesterol in the Aged Mouse During Pregnancy
1 Biological Sciences Department, Purdue University
Fort Wayne, Indiana 46805 Ovarian
5-3
-hydroxysteroid dehydrogenase (3
-OH-SDH) and ovarian free and total
cholesterol were determined in young (3 mo.) and aged (12-14 mo.) C57BL mice 18 days
post-coitum (p.c.). There was less histochemically demonstrable 3
-OH-SDH in the theca, granulosa
and luteal cells and significantly more ovarian total cholesterol (1.85 vs 0.98 mg percent) in aged
mice not maintaining pregnancy than in young animals. Females of either age successfully
maintaining pregnancy to 18 days exhibited similar ovarian 3
-OH-SDH activity and ovarian free
and total cholesterol levels. The reduced enzyme activity in the older nonpregnant animal suggests
a decrease in potential of the ovary to produce
4-ketosteroids, while the elevation in total
cholesterol may reflect a decline in conversion of cholesterol to steroid product.
Accepted on April 28, 1975
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