title: Treatment with poly I.C. enhances lipid peroxidation and the activity of xanthine oxidase, and decreases hepatic P-450 content and activities in mice and rats.
abstract: Treatment of mice and rats with polyriboinosinic acid-polyribocytidylic acid (poly I.C., 5 mg/kg i.p.), a potent interferon inducer, decreased hepatic cytochrome P-450 system content and activities without influencing P-450-independent xenobiotic metabolizing enzymes. Treatment with poly I.C. decreased the content of P-450 by 28% in mice (P less than 0.05) and 30% in rats (P less than 0.05) but did not alter the activity of cytochrome c reductase. With treatment of poly I.C., the activity of XO increased 87% in mice (P less than 0.01) and 30% in rats (P less than 0.01). Lipid peroxidation was enhanced by 82% in mice (P less than 0.01) and 95% in rats (P less than 0.05). These results raise the possibility that a part of the depression of P-450 system content and activities by poly I.C. might be caused by enhanced lipid peroxidation associated with increased activity of XO.
mesh_terms: D000818:Animals; D043182:Carboxylesterase; D002265:Carboxylic Ester Hydrolases / Q000378:metabolism; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D004789:Enzyme Activation / Q000187:drug effects; D004851:Epoxide Hydrolases / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D008054:Lipid Peroxides / Q000096:biosynthesis*; D008297:Male; D051379:Mice; D008862:Microsomes, Liver / Q000187:drug effects / Q000378:metabolism*; D006899:Mixed Function Oxygenases / Q000378:metabolism; D009245:NADH Dehydrogenase / Q000378:metabolism; D011070:Poly I-C / Q000494:pharmacology*; D051381:Rats; D014969:Xanthine Oxidase / Q000378:metabolism*
chemical_list: D008054:Lipid Peroxides; D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D014969:Xanthine Oxidase; D009245:NADH Dehydrogenase; D005982:Glutathione Transferase; D002265:Carboxylic Ester Hydrolases; D043182:Carboxylesterase; D004851:Epoxide Hydrolases; D011070:Poly I-C