title: Methionine-supplemented diet augments hepatotoxicity and prooxidant status in chronically ethanol-treated rats.
abstract: The purpose of this study was to investigate whether high methionine (HM) diet may influence the development of ethanol-induced hepatotoxicity and prooxidant-antioxidant balance in the liver. Rats received drinking water containing ethanol (20% v/v) and/or methionine supplemented diet (2% w/w) for 75 days. Although prooxidant-antioxidant balance did not change in the liver of rats in HM group, ethanol treatment was observed to increase plasma transaminase activities, and malondialdehyde (MDA) and protein carbonyl (PC) levels, but not glutathione (GSH), vitamin E and vitamin C levels, and superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and glutathione transferase (GST) activities in the liver of rats as compared to controls. However, ethanol plus HM diet caused further increases in plasma transaminase activities and hepatic MDA and PC levels. In addition, SOD, GSH-Px and GST activities were observed to decrease, but GSH, vitamin E and vitamin C levels remained unchanged in the liver as compared to ethanol, HM and control groups. Our results show that HM diet may augment hepatotoxicity and oxidative stress in the liver of chronically ethanol-treated rats.
authors.affiliation: Department of Biochemistry, Istanbul Faculty of Medicine, Istanbul University, Capa, Istanbul, Turkey.
authors.forename: Seda
authors.initials: S
authors.lastname: Yalçinkaya
authors.forename: Yeşim
authors.initials: Y
authors.lastname: Unlüçerçi
authors.forename: Müjdat
authors.initials: M
authors.lastname: Uysal
mesh_terms: D000818:Animals; D004032:Diet; D019587:Dietary Supplements; D004357:Drug Synergism; D004359:Drug Therapy, Combination; D000431:Ethanol / Q000633:toxicity*; D005979:Glutathione Peroxidase / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D008099:Liver / Q000187:drug effects* / Q000201:enzymology / Q000473:pathology; D008108:Liver Diseases, Alcoholic / Q000188:drug therapy* / Q000201:enzymology / Q000473:pathology; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D008715:Methionine / Q000008:administration & dosage*; D016877:Oxidants / Q000097:blood; D018384:Oxidative Stress / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D016877:Oxidants; D000431:Ethanol; D008315:Malondialdehyde; D008715:Methionine; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005982:Glutathione Transferase