姜黄素对小鼠非酒精性脂肪性肝炎炎症信号传导通路的调控作用

目的：研究探讨姜黄素（Curcumin）对非酒精性脂肪性肝炎（NASH）炎症信号传导通路的调控作用。方法：采用胆碱蛋氨酸缺乏（Methionine-Choline-Deficient,MCD）饮食诱导的小鼠NASH模型。15只小鼠随机分为MCD组、胆碱蛋氨酸充足（Methionine-Choline-Sufficient,MCS）组、姜黄素组,每组5只。造模同时姜黄素组予以姜黄素干预性灌胃给药两周（1.15g/kg bw）,1次/d;MCS组和MCD组予以二甲基亚砜（DMSO）灌胃两周（1ml/10gbw）,1次/d。两周实验结束后,处死实验动物,取血清和肝组织。观察肝组织病理学变化;血清丙氨酸氨基转移酶（ALT）、谷氨酸氨基转移酶（AST）活性通过全自动生化分析仪进行测定;血清肿瘤坏死因子α（TNF-α）、白介素-6（IL-6）、白介素-4（IL-4）水平通过放射免疫试法进行测定;肝组织核因子-κB（NF-κB）及氧化物酶体增殖物激活受体γ（PPARγ）蛋白表达通过Western blot进行测定。结果：与MCD组比较,姜黄素组肝组织病理变化明显改善,病理评分显著降低,血清ALT活性,TNF-α水平及IL-6水平显著下降,肝组NF-κB表达显著下降。姜黄素组肝组织PPARγ表达较MCD组有所升高,但差异无显著性意义。结论：姜黄素对MCD饮食诱导的小鼠NASH具有抗炎作用;姜黄素可以抑制NF-κB的促炎信号传导通路的表达,从而抑制炎症因子TNF-α及IL-6生成,起到调控炎症信号传导通路的作用;姜黄素对PPARγ抗炎信号传导通路无明显作用。

The regulation of curcumin on inflammatory signaling pathway in murine non-alcoholic steatohepatitis

Objective:To investigate the regulation mechanism of curcumin on inflammatory signaling pathway in murine non-alcoholic steatohepatitis.Methods:Experimental NASH was induced in mouse by the methionine-choline-deficient diet.Fifteen mice were randomly divided into four groups.Curcumin group was treated with DMSO solution of curcumin(1.15g/kg bw) via intragastric administration once a day for 2 weeks.MCS group and MCD group were treated with DMSO.After 2 wks mice were killed to obtain blood samples and liver ...