title: Increased cytochrome P-450 independent drug metabolism and mutagen activation in rat liver by octachlorostyrene.
abstract: Single intraperitoneal injections of 200 mg/kg octachlorostyrene (OCS) increased the activities of flavin-containing monooxygenase, epoxide hydrolase and glutathione S-transferase in the livers of male Wistar rats. UDP-glucuronyl transferase activities measured with aglycones increased by methylcholanthrene or phenobarbital treatment, were both slightly increased by OCS treatment. A liver 9,000 X g supernatant fraction from OCS pretreated rats increased the bacterial mutagenicity of 2-acetylaminofluorene and 2-aminofluorene compared to controls, while insignificant or only minor effects were seen on N-hydroxy 2-acetylaminofluorene and benzo(a)pyrene mutagenicity. The effect of OCS on mutagen activation was similar to that seen after phenobarbital treatment. The use of monolayers of hepatocytes instead of 9,000 X g subfractions did not reveal any qualitative differences in mutagen activation.
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D003577:Cytochrome P-450 Enzyme System / Q000096:biosynthesis*; D004790:Enzyme Induction / Q000187:drug effects; D008099:Liver / Q000201:enzymology*; D008297:Male; D008862:Microsomes, Liver / Q000201:enzymology; D009152:Mutagenicity Tests; D051381:Rats; D011919:Rats, Inbred Strains; D012486:Salmonella typhimurium; D013343:Styrenes / Q000494:pharmacology*
chemical_list: D013343:Styrenes; C014138:octachlorostyrene; D003577:Cytochrome P-450 Enzyme System