参芎注射液对大鼠脑缺血再灌注后神经细胞凋亡及Fas死亡结构域蛋白表达的影响

目的:探讨参芎注射液对大鼠脑缺血再灌注后神经细胞凋亡及Fas相关死亡结构域蛋白(FADD)及其mRNA表达的影响.方法:100只SD大鼠随机分为正常组(n=10)、假手术组(n=10)、脑缺血再灌注组(n=40)和参芎注射液组(n40).线栓法制备大脑中动脉闭塞模型,TUNEL法检测神经细胞凋亡,分别应用免疫组织化学染色和逆转录-聚合酶链式反应检测FADD蛋白和mRNA表达.结果:与正常组和假手术组相比,脑缺血再灌注组凋亡神经细胞计数显著增加(P＜0.01),FADD蛋白和mRNA表达均显著增强(P均＜0.01).与脑缺血再灌注组比较,参芎注射液组凋亡神经细胞显著减少(P＜0.05,P＜0.01),FADD蛋白和mRNA表达显著减弱(P＜0.05,P＜0.01).结论:参芎注射液能通过下调FADD表达抑制大鼠脑缺血再灌注后神经细胞凋亡.

Effect of Shenxiong Injection on Neuronal Apoptosis and Fas-Associated Death Domain Protein Expression After Ischemia-Reperfusion in Rats

Objective:To imestigate the effect of Shenxiong injection on neuronal aooptosis and Fasassociated death dormin protein(FADD)and its mRNA expression after ischernia-reperfusion in rats.Methods:Atotal of 100 SD rats wgre randomly allocated into normal(n=10),sham-operation(n=10),cerebral ischemia-reperfusion(n=40),and Shenxiong injection(n=40)groups.A model of middle cerebral wtery occlusion was induced by suture method.The neuronal apoptosis was detected by the TUNEL assay.The expressions of FADD protein and mRNA were detected by inmmnohistochemical staining and reverse tramcription-polymerase chain reaction(RT-PCR),respectively.Results:As compared with the normal and sham-operation groups.the numbers of apoptotic cell in the cerebral ischemia-reperfusion group were increased significantly(P＜0.01),and the expressions of FADD protein and mRNA were enhanced significantly(all P＜0.01).As compared with the ceretral ischemia-reperfusion group,the numbers of apoptotic cell were decreased significantly (P＜0.05,P＜0.001),and the expressiom of FADD protein and mRNA were reduced significantly in the Shenxiong group(P＜0.05,P＜o.001).Convlusions:Shertxiong injection may inhibit the neuronal apoptosis after ischemia-reprfusion in r-cas by down-regulaftng the expression of FADD.