Effect of hepatocyte cytochrome oxidase Ⅰ on nonalcoholic fatty liver in rats / 第三军医大学学报

ABSTRACT

Objective To study the expression and effect of hepatocyte mitochondrial DNA cytochrome c oxidase subunitsⅠ (COXⅠ) gene in rat nonalcoholic fatty liver model. Methods Forty Wistar rats were randomly divided into control group and high-fat diet group, and the high-fat diet group was subsequently divided into 4 subgroups (2, 4, 8 and 12 week) with 8 rats in each. Cytochrome c oxidase activity was determined by ultraviolet spectrophotometer. Meanwhile,the expression of hepatocyte COXⅠ antigen in rat nonalcoholic steatosis model induced by high fat diet were detected by Western blotting. Mitochondrial DNA COXⅠ mRNA were assayed by reversetranscription polymerase chain reaction(RT-PCR). Results The levels of activity in nonalcoholic steatosis rats induced by high fat diet at 2, 4, 8, and 12 weeks were (0.88?0.32), (0.76?0.37), (0.48?0.26), (0.39?0.21) nmol?mg~ -1 ?min~ -1 , respectively, significantly lower than (0.98?0.37) nmol?mg~ -1 ?min~ -1 in control group (P