Metabolism of the contraceptive steroid desogestrel by the intestinal mucosa.
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چکیده
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15 صفحه اولThe role of CYP2C in the in vitro bioactivation of the contraceptive steroid desogestrel.
Desogestrel is a 3-deoxo progestogenic steroid that requires bioactivation to 3-ketodesogestrel. In these studies we have attempted to define the pathway of 3-ketodesogestrel formation and characterise the enzymes responsible for this biotransformation in vitro. Initial studies using deuterated desogestrel confirmed that desogestrel is metabolised by human liver microsomes via 3alpha-hydroxy an...
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15 صفحه اولInactivation of contraceptive steroid hormones by human intestinal clostridia.
Steroid hormones reduced in ring-A are devoid of hormonal activity. In metabolic experiments we found that human fecal flora reduced the delta 4-3-keto structure of natural progestins to 3 alpha-hydroxy, 5 beta-steroid metabolites (3 alpha,5 beta) and of synthetic progestins to a mixture of 3 alpha,5 beta and 3 beta,5 beta compounds. 3 alpha,5 beta-Reductase was synthesized by Clostridium parap...
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ژورنال
عنوان ژورنال: British Journal of Clinical Pharmacology
سال: 1989
ISSN: 0306-5251
DOI: 10.1111/j.1365-2125.1989.tb05368.x