Objective: To observe the effects of soothing liver and invigorating spleen recipes on the expression levels of SREBP-1c, SCD-1 mRNA and proteins in hepatocytes of NAFLD rats,and to explore its possible mechanisms of prevention and treatment of NAFLD.
Methods: 75 SD male rats were randomly divided into 5 groups: normal group, model group, oothing liver group (administrated with 9.6 g/kg), invigorating spleen group (administrated with 30 g/kg)and integrated group (administrated with 39.6 g/kg). The rats of NASH model were induced by feeding a high-fat diet. After treatment for 8 weeks,9 rats were randomly taken to detect liver function, TC, TG and pathological changes in liver tissue. The other 6 rats of each group were taken respectively and collagenase (Type IV) was perfused to digest liver tissue with the circulation in vitro to separate hepatocytes. Real-time Q-PCR and Western Blot were used to detect the expression levels of SREBP-1c, SCD-1 mRNA and proteins.
Results: Compared with the model group,the different decrease levels of SREBP-1c, SCD-1 genes and proteins were found in all drug therapy groups (P < 0.05 or P < 0.01), as well different degrees that liver lipid and pathological changes became better, especially that of in soothing liver group. Comparison between the all drug therapy groups,the hepatocytes expression levels of SREBP-1c and SCD-1 mRNA in soothing liver group were lower than that of in invigorating spleen group (P < 0.05), but expression levels of the proteins had no statistical significances.
Conclusion: Soothing liver and invigorating spleen recipes prevent and treat NAFLD,its mechanism may be related to inhibiting the activation of SREBP-1c/SCD-1 signal pathway in hepatocytes to down-regulate TC and TG synthesis and reduce hepatic lipid deposition. SREBP-1c, SCD-1 mRNA and proteins may be the effective targets.
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