Abstract: Objective The aim of this experiment was to investigate the changes of lipid metabolism related genes in liver tissues of mice with nonalcoholic fatty liver diseases (NAFLD). Methods A NAFLD model was established in ten mice by feeding high-fat diet. The histopathological changes of the liver tissues were observed. Blood total cholesterol (TCH) and triglycerides (TG) levels were detected, and sterol regulatory element-binding proteins (SREBPs), acetyl coenzyme carboxylase (ACC) and fatty acid synthase (FAS) mRNA were detected by reverse transcription-polymerase chain reaction. Results The steatosis of liver cells was found in mice in NAFLD model group; blood TG and TCH levels in NAFLD model group were (0.63±0.13) mmol/L and (7.23±0.7) mmol/L, significantly higher than [(0.28± 0.06) mmol/L and (2.78±0.6) mmol/L, P<0.001] in ten mice in the control; at the end of 24 w experiment, hepatic FAS and SREBP-1 mRNA in NAFLD mice were (3.9±1.1) and (1.8±0.7), significantly higher than 【(1.0±0.3) and (1.0±0.4), FAS: t = 6.231, P<0.001; SREBP-1: t = 2.431, P =0.035】, while the ACC mRNA was (1.2±0.5), not significantly different as compared to 【(1.0±0.4), t = 0.765, P =0.462】 in the control. Conclusion The lipid metabolism related genes in liver tissue of mice with NAFLD are significantly up-regulated, which might play a pivotal role in the pathogenesis of NAFLD.

Key words: Nonalcoholic fatty liver, Lipid metabolism, Sterol regulatory element-binding proteins, Acetyl coenzyme carboxylase, Fatty acid synthase, Mice