The role of hepatocyte cytochrome P450 1A1, 2E1 in rat nonalcoholic steatosis / 中华消化杂志

ABSTRACT

Objective To detect the expression of hepatocyte cytochrome P450 1A1,2E1 in rat non alcoholic steatosis model. Methods 7 ethoxyresorufin O deethylase (EROD) and benzopyrene hydroxylase (ANH) activity were determined by ultraviolet chromatography. The expression of hepatocyte cytochrome P450 1A1, 2E1 protein in the liver of rats with non alcoholic steatosis induced by high fat diet was detected with immunohistochemistry and Western blot. Cytochrome P450 1A1, 2E1 mRNA were assayed with reverse transcriptase polymerase chain reaction(RT PCR). Results The levels of EROD activity in nonalcoholic steatosis rat at 2, 4, 8, 12 week and normal control group were (325.07?59.68),(345.25?49.28),( 468.95 ?55.28),( 548.68 ?43.25) and (260.42?35.32) nmol?mg -1 ?min -1 respectively. The levels of ANH activity in nonalcoholic steatosis rat at 2, 4, 8, 12 week and normal control group were (635.68 ?65.48), (735.45 ?76.89 ),(887.45?85.65),(956.58?84.47) and (500.25?78.34) nmol?mg -1 ?min -1 respectively. These indicate that the levels of EROD and ANH activity in rats with nonalcoholic steatosis were significantly increased compared with that in control group. In addition, the expression of hepatocyte cytochrome P450 1A1, 2E1 protein and cytochrome P450 1A1, 2E1 mRNA in rats with nonalcoholic steatosis were significantly higher than that in control group. The level of P450 1A1 and 2E1 was increased correspondingly with the degree of nonalcoholic steatosis. Conclusions The induction of hepatocyte cytochrome P4501A1 and 2E1 might participate in the development of nonalcoholic steatosis