姜黄素治疗肝纤维化及相关细胞因子变化的研究

目的:观察姜黄素治疗肝纤维化的效果及相关细胞因子的变化,探讨两者之间的关系。方法:以四氯化碳腹腔注射的方法制作大鼠肝纤维化模型,姜黄素治疗组于第9周起分别予姜黄素10、20、40 mg/100g体重灌胃,设正常、溶剂、模型与丹参对照组,检测血清ALT、AST、HA、LN、PC-Ⅲ,ELISA法检测TGF-β1、TNF-α,化学法检测血清NO,肝组织行HE和Masson胶原染色,光镜下观察病理学改变,并按SSS计分系统进行评分。免疫组化染色观察肝组织PDGF-BB变化,专业图像分析软件进行分析。结果:与模型组比较,姜黄素治疗组能明显降低肝纤维化时异常升高的ALT、AST、HA、LN、PC-Ⅲ(P<0.05);降低血清细胞因子NO、TGF-β1、TNF-α水平(P<0.05);明显改善四氯化碳所致大鼠肝纤维化的病理学改变,肝纤维化评分明显降低(P<0.05),接近正常组;抑制PDGF-BB的合成表达(P<0.05),上述作用随着姜黄素剂量增大而增强。结论:姜黄素具有治疗大鼠肝纤维化作用,减少相关细胞因子的表达可能是其重要的作用机制。

The Study of Therapeutic Effects of Curcumin on Hepatic Fibrosis and Variation of Correlated Cytokine

OBJECTIVE: To investigate therapeutic effects of curcumin on hepatic fibrosis and the variation of correlated cytokine. METHODS: Rat models of hepatic fibrosis were made by carbon tetrachloride. Curcumin of 10, 20, 40 mg per 100 gram weight of rat were given to these rats of curcumin group respectively from ninth week. Normal, dissolvent, model and Salvia miltiorrhiza groups were made as controls. Serum levels of ALT, AST, HA, LN, PC-III were detected; Serum levels of TGF-beta1 and TNF-alpha were detected by ELISA method; Serum levels of NO were detected by chemical method. HE and Masson staining were conducted in hepatic tissues to observe pathological variations. Grades of hepatic fibrosis were evaluated according to SSS system. Immunohistochemical staining was executed for detecting PDGF-BB in liver, and professional software for image analysis was used. RESULTS: Curcumin could decrease serum levels of ALT, AST, HA, LN, PC-III obviously, P < 0.05, which were increased in fibrotic group. Curcumin could decrease cytokine levels of NO, TGF-beta1, TNF-alpha, P < 0.05. Curcumin could obviously improve liver pathological variations of fibrotic rats. The score of hepatic fibrosis in curcumin group reduced significantly, P < 0.05. Curcumin treatment could reduce the expression of PDGF-BB, P < 0.05. These effects were dose-dependent. CONCLUSION: Curcumin can heal rat hepatic fibrosis. Effects of reducing the expression of correlated cytokines may be mechanisms of therapeutic effects of curcumin on hepatic fibrosis.