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Journal of Clinical Endocrinology & Metabolism, Vol 61, 404-407, Copyright © 1985 by Endocrine Society

ARTICLES

In vitro effect of estrogens on the peroxidase activity of human endometrium

H Okada, M Nawa and J Kimura

The effect of estrogen on the induction of human endometrial peroxidase was studied in vitro. When 17 beta-estradiol was added to the incubation medium, endometrial peroxidase activity was markedly increased, and the highest enzymatic activities were reached at about 12 h of incubation. The ability of estrogen and related compounds to increase peroxidase activity at a concentration of 10(-7) M was 17 beta- estradiol greater than estrone greater than 17 alpha-ethynylestradiol greater than estriol = diethylstilbestrol. Mestranol, progesterone, and testosterone had almost no activity. The induction of peroxidase by 17 beta-estradiol was inhibited by actinomycin D or cycloheximide. This method may be useful for determining the direct estrogenic effect of compounds in human endometrium.


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