Regulation of carcinogen metabolism in the rat ovary by the estrous cycle and gonadotropin

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Science  25 Mar 1983:
Vol. 219, Issue 4591, pp. 1437-1438
DOI: 10.1126/science.6681915


The activity of 7,12-dimethylbenz[a]anthracene hydroxylase in the rat ovary is several times higher in the proestrous phase of the estrous cycle than in the estrous and metestrous plus diestrous phases. Administration of gonadotropin leads to a similar increase in the capacity of the ovary to metabolize xenobiotics. This variation in the activity of 7,12-dimethylbenz[a]anthracene hydroxylase during the estrous cycle may be related to the marked changes in the incidence of ovarian cancer during menopause and in women taking contraceptive pills.