Abstract
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.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Aryl Hydrocarbon Hydroxylases / metabolism*
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Cytochrome P-450 Enzyme System / metabolism
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Epoxide Hydrolases / metabolism
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Estrus*
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Female
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Glutathione Transferase / metabolism
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Gonadotropins, Equine / pharmacology*
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Metestrus
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Ovary / physiology*
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Pregnancy
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Proestrus
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Quinone Reductases / metabolism
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Rats
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Rats, Inbred Strains
Substances
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Gonadotropins, Equine
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Cytochrome P-450 Enzyme System
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7,12-dimethylbenz(a)anthracene hydroxylase
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Aryl Hydrocarbon Hydroxylases
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Quinone Reductases
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Glutathione Transferase
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Epoxide Hydrolases