Effect of GLP-1 on liver function and TLR4/NF-κB signal pathway in NAFLD rats / 实用医学杂志

ABSTRACT

Objective To study the effect of GLP-1 on the liver function and the signal pathway of TLR4/NF-κB in NAFLD rats.Methods Forty-five rats were randomly divided into two groups,15 with normal diet fed and 30 with high-fat diet,so as to form NAFLD model.In the tenth week,28 rats fed with high-fat diet were randomly divided into two groups,the model control group (14) and the GLP-1 intervention group (14 rats).The normal diet fed in 15 rats served as the normal control group.After the model group and the control group rats were injected with saline treatment,the intervention group rats were injected with liraglutide treatment.We observed the changes in the activity of rats,body weight,appetite,urine and other conditions.Results Compared with the control group,the liver index,liver mass,ALT,AST,TG and TC of the model rats were significantly higher than those of the control group (P ＜ 0.05).The liver index,liver mass,ALT,AST,TG and TC of the model rats were significant lower in the GLP-1 intervention group than those in the model control group (P ＜ 0.05).Compared with the normal control group,the expression of TLR4 and NF-κB protein in the model control group increased in the model control group (P ＜ 0.05).Compared with the model control group,the expression of TLR4 and NF-κB protein was decreased in the GLP-1 intervention group (P ＜ 0.05).Conclusion GLP-1 can significantly reverse the disorder of glucose and lipid metabolism and impaired liver function in NAFLD rats,and GLP-1 can significantly reduce the expression of NF-κB and TLR4 protein in the liver tissues of rats.