冠心合剂对急性心梗大鼠心肌bFGF表达及血管新生的影响

目的：观察冠心合剂对急性心肌梗死（AMI）大鼠碱性成纤维生长因子（basic fibroblast growth factor,bFGF）表达及血管新生作用的影响及作用机制。方法：SD大鼠65只,除假手术组8只外,其余大鼠结扎冠状动脉左前降支建立大鼠急性心肌梗死模型,造模成功40只。随机分为冠心合剂大、中、小剂量组及阳性对照组、模型组,各8只。造模后冠心合剂治疗组应用相应剂量冠心合剂灌胃,阳性对照组结扎后立即在结扎处周围喷洒1揿bFGF（125AU）,术后5天皮下注射肝素1 250 U/kg 1次;假手术组及模型组每天给予同等体积蒸馏水灌胃。术后2周处死各组大鼠,取心脏标本,HE染色,免疫组化方法显微镜下定量分析心肌bFGF蛋白表达,并根据VIII因子染色结果计算缺血心肌微血管密度（MVD）。结果：冠心合剂治疗组及阳性对照组大鼠心肌bFGF蛋白表达与新生微血管密度显著增加,明显高于模型组和假手术组（P〈0.01）;随冠心合剂剂量的增加,心肌梗死面积逐渐减小,心肌bFGF蛋白水平相应升高,心肌梗死边缘微血管密度逐渐增大;冠心合剂大剂量组疗效与阳性对照组相似（P〉0.05）。结论：冠心合剂可以增加急性心肌梗死（AMI）大鼠梗死区心肌bFGF蛋白表达和微血管密度,同时减少梗死面积,呈一定的剂量依赖性;冠心合剂促AMI大鼠血管新生的机制可能与增加心肌bFGF蛋白表达有关。

Effect of Guanxin Decoction on Angiogenesis and Expressions of Basic Fibroblast Growth Factor in Myocardium of Rats with Acute Myocardial Infarction

Objective: To investigate the effect of Guanxin Decoction on angiogenesis and the expression of Basic Fibroblast Growth Factor(bFGF) in myocardium of rats with acute myocardial infarction(AMI) and the underlying mechanism.Methods:A total of 65 SD rats were used.Eight of the rats were randomized into sham operation group.AMI model was successfully established in 40 SD rats by ligating the rats left anterior descending coronary arteries(LAD) after anesthetized by 2.5% pentobarbital sodium.Then the 40 AMI rats...