Effect of TFHL on expression of CYP2E1 in liver tissue of rats with NASH / 中华中医药杂志

ABSTRACT

Objective:To observe the expression of cytochrome P4502E1 (CYP2E1) in the liver tissue of rats with non-alcoholic steatosis hepatitis (NASH) induced by high-fat diet, and effect of total flavonoids of Chinese hawthorn leaf(TFHL). Methods: The model rats of NASH were induced by 12 weeks' high-fat diet, and treated with TFHL and Essentiale. The pathological changes of rats liver were observed, the amounts of liver MDA, and the activities of SOD, GSH-Px were detected, the mRNA and protein expressions of CYP2E1 were detected with RT-PCR and immunochemical method. Results: ①there were serious steatosis, different degree of infiltration of inflammatory cells and necrosis focus in the livers of model rats, the amounts of liver MDA was higher than that of the normal group, the acttivities of SOD, GSH-Px in the livers were lower, the expressions of mRNA and protein were strengthened. ②the expression of CYP2E1 of livers has a positive correlation with the amount of MDA, but negative correlation with the activity of SOD and GSH-Px. ③the inflammation of liver, the amounts of liver MDA level, the mRNA and protein expressions of CYP2E1,the activity of SOD and GSH-Px in rats treated with high or low dose TFHL were obviously lower than the model rats, but the activities of SOD and GSH-Px were higher than the model rats.Conclussion CYP2E1 takes part in the onset and development of NASH induced by high-fat diat, TFHL can restrain the activity of CYP2E1 and the lipid peroxidization, enhance the ability of antioxygenation of liver cells, and prevent the further development of NASH.