姜黄素对四氯化碳诱导大鼠肝纤维化的影响

Effect of curcumin on rat hepatic fibrosis induced by carbon tetrachoride

目的:观察姜黄素(Cur)预防给药对四氯化碳(CCl4)诱导大鼠肝纤维化的影响,并探讨其相关的分子机制。方法:64只雄性SD大鼠随机分为正常对照组(10只),模型对照组(14只)和水飞蓟宾组(10只),Cur低、中、高剂量组(各10只)。模型对照、水飞蓟宾和Cur组均采用皮下注射体积分数40%CCl4复制肝纤维化模型,水飞蓟宾组大鼠同时给予0.5g/L水飞蓟宾,Cur低、中、高剂量组大鼠同时分别给予1、2、4g/L的Cur灌胃7周。HE染色观察各组大鼠肝组织的病理形态,进行肝纤维化分级;血清生化学检测谷氨酸氨基转移酶(ALT)、谷草转氨酶(AST)及碱性磷酸酶(ALP)含量,计算白球蛋白比值(A/G);放射免疫法测定透明质酸(HA)、Ⅲ型前胶原氨基端肽(PⅢNP)、层粘连蛋白(LN)以及胶原Ⅳ(C-Ⅳ)的含量变化;免疫组织化学染色法检测肝组织过氧化物酶增殖体激活受体γ(PPAR-γ)和CollagenⅠ的含量。结果:Cur预防给药可明显降低ALT、AST的活性,升高A/G,同时降低血清HA、LN、PⅢNP、C-Ⅳ含量(F=11.535,19.927,4.831,16.415,17.596,19.692,21.535,P<0.05);病理形态显示Cur对大鼠的肝纤维化进展有明显的抑制作用;Cur预防给药使受试动物肝组织PPAR-γ表达明显增加、CollagenⅠ的表达明显减少(F=6.519,7.541,P<0.05)。结论:Cur预防给药能明显抑制CCl4诱导的大鼠肝纤维化形成,可能与激活PPAR-γ,减少CollagenⅠ的产生,预防细胞外基质的过量沉积有关。

Aim:To investigate the effect of curcumin(Cur) on rat liver fibrosis induced by carbon tetrachoride (CCl4) and its possible molecular mechanism.Methods:A total of 64 male rats were randomly divided into six groups: normal control group(n=10),model group(n=14),silibinin group(n=10) and low,middle,and high-dose curcumin groups(n=10).Apart from normal control group,those in other five groups were injected subcutaneously 40% CCl4 for seven weeks to induce the model of liver fibrosis.At the same time,the rats in...