title: Activation of mitogen activated protein kinase (MAPK) during carbon tetrachloride intoxication in the rat liver.
abstract: Carbon tetrachloride (CCl(4): 4 ml/kg body weight as a 1:1 mixture of CCl(4) and mineral oil) was orally administered to rats. After 12 h the activity of plasma AST (aspartate aminotransferase) and ALT (alanine aminotransferase) was significantly higher than that of the control group and plasma AST and ALT activities increased thereafter. These results indicated that the necrotic process was active at about 12 h and developed thereafter. After 2-24 h of CCl(4) administration, the hepatic level of vitamin C, the most sensitive indicator of oxidative stress, decreased significantly, indicating that oxidative stress was significantly enhanced as early as 2 h after CCl(4) intoxication and thereafter. Phosphorylated JNK (c-Jun NH(2)-terminal kinase) and phospho-ERK1/2 (extracellular signal-regulated kinase1/2) were significantly increased transiently 1-3 h after treatment with CCl(4), while phosphorylated p38 decreased significantly 1-24 h after CCl(4) treatment. These results indicated that the change in MAPKs (mitogen activated protein kinases) slightly preceded that in vitamin C, the most sensitive chemical indicator of oxidative stress.
authors.affiliation: Department of Food Science and Nutrition, Nara Women's University, Nara, 630-8506 Japan.
authors.forename: Chinatsu
authors.initials: C
authors.lastname: Iida
authors.forename: Kozue
authors.initials: K
authors.lastname: Fujii
authors.forename: Terumi
authors.initials: T
authors.lastname: Kishioka
authors.forename: Ritsuko
authors.initials: R
authors.lastname: Nagae
authors.forename: Yuki
authors.initials: Y
authors.lastname: Onishi
authors.forename: Ikuyo
authors.initials: I
authors.lastname: Ichi
authors.forename: Shosuke
authors.initials: S
authors.lastname: Kojo
mesh_terms: D000818:Animals; D001205:Ascorbic Acid / Q000378:metabolism; D002252:Carbon Tetrachloride Poisoning / Q000201:enzymology / Q000378:metabolism* / Q000473:pathology; D004195:Disease Models, Animal; D004789:Enzyme Activation; D048031:JNK Mitogen-Activated Protein Kinases / Q000378:metabolism; D008099:Liver / Q000201:enzymology / Q000378:metabolism* / Q000473:pathology; D008297:Male; D019950:Mitogen-Activated Protein Kinase 1 / Q000378:metabolism; D048052:Mitogen-Activated Protein Kinase 3 / Q000378:metabolism; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism*; D009336:Necrosis; D018384:Oxidative Stress; D010766:Phosphorylation; D051381:Rats; D017208:Rats, Wistar; D013997:Time Factors; D048051:p38 Mitogen-Activated Protein Kinases / Q000378:metabolism
chemical_list: D048031:JNK Mitogen-Activated Protein Kinases; D019950:Mitogen-Activated Protein Kinase 1; D048052:Mitogen-Activated Protein Kinase 3; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; D001205:Ascorbic Acid