1.14.14.29 3alpha-adiol - 21786 1.14.14.29 5alpha-androstane-3alpha,17beta-diol inhibition of the reaction with dehydroepiandrosterone 2012 1.14.14.29 5alpha-androstane-3alpha,17beta-diol inhibition of the reaction with dehydroepiandrosterone; significantly inhibits CYP7B1-mediated 7alpha-hydroxylation 2012 1.14.14.29 5alpha-Androstane-3beta,17beta-diol inhibits hydroxylation of dehydroepiandrosterone by approximately 60-70% when both steroids are present at equimolar concentrations. A 10fold higher concentration of 5alpha-androstane-3beta,17beta-diol than of dehydroepiandrosterone in the incubation mixture results in the suppression of dehydroepiandrosterone hydroxylation by 80%. In HEK293 cells, the suppressive effect of 5alpha-androstane-3beta,17beta-diol on dehydroepiandrosterone metabolism is statistically significant also at a 10fold lower concentration of 5alpha-androstane-3beta,17beta-diol than of dehydroepiandrosterone in the incubation mixture 3060 1.14.14.29 5alpha-Androstane-3beta,17beta-diol inhibits hydroxylation of dehydroepiandrosterone by approximately 60-70% when both steroids are present at equimolar concentrations. A 10fold higher concentration of 5alpha-androstane-3beta,17beta-diol than of dehydroepiandrosterone in the incubation mixture results in the suppression of dehydroepiandrosterone hydroxylation by 80% 3060 1.14.14.29 dehydroepiandrosterone inhibits hydroxylation of 5alpha-androstane-3beta,17beta-diol 275 1.14.14.29 LY294002 specific inhibitor of phosphatidylinositol 3-kinase, abolishes estrogen receptor-mediated upregulation of a CYP7B1 promoter-luciferase reporter in Hep-G2 cells but not in HEK-293 cells 770 1.14.14.29 additional information no inhibition: testosterone, dehydroepiandrosterone sulfate 2 1.14.14.29 additional information testosterone, dehydroepiandrosterone-sulfate or 22-hydroxycholesterol have little or no effects on CYP7B1-mediated activities 2 1.14.14.29 additional information mRNA encoding CYP39A1 gene is significantly repressed by pregnane X receptor activation in primary hepatocytes of wild-type mice but not in pregnane X receptor-/- hepatocytes 2