Abstract

目的 观察中药高山红景天组方对糖尿病大鼠糖尿病视网膜病变(DR)早期血管内皮生长因子(VEGF)表达的影响.方法 采用腹腔注射链脲佐菌素(STZ)的方法建立糖尿病大鼠模型.随机分为糖尿病模型治疗组、糖尿病模型未治疗组、正常给药组、正常对照组.造模成功4个月后糖尿病模型治疗组及正常给药组给予高山红景天3g/kg、川芎3g/kg、丹参3g/kg、甘草3g/kg,水煎灌胃,每日1次,正常对照组及糖尿病模型未治疗组均给予凉开水灌胃,每日1次,共1个月.处死大鼠,摘除眼球行VEGF免疫组织化学染色和逆转录-聚合酶链反应(RT-PCR)半定量分析VEGF mRNA的表达.结果 糖尿病模型未治疗组与正常对照组间大鼠体重、血糖比较差异均有统计学意义(P<0.01),糖尿病模型治疗组与正常对照组间大鼠体重、血糖差异均有统计学意义(P<0.01).VEGF免疫组织化学染色结果显示,糖尿病模型未治疗组、糖尿病模型治疗组、正常对照组及正常给药组视网膜组织VEGF的蛋白表达积分光密度(IOD)值分别为0.316±0.046、0.149±0.038、0.126±0.028、0.130±0.038;各组面密度(AD)值分别为0.463±0.185、0.121±0.015、0.122±0.007、0.121±0.011.糖尿病模型治疗组与糖尿病模型未治疗组相比、正常对照组与糖尿病模型未治疗组相比IOD值及AL值差异均有统计学意义(P<0.01).正常给药组及正常对照组组间比较差异无统计学意义(P>0.05).RT-PCR检测VEGF mRNA表达显示,糖尿病模型治疗组对目的 基因有表达,表达水平较低,糖尿病模型未治疗组对目的 基因有表达,表达水平较高;糖尿病模型治疗组与未治疗组比较差异有统计学意义(P<0.01);正常对照组对目的 基因几乎无表达.结论 高山红景天组方口服可使糖尿病鼠视网膜VEGF的表达减少,为DR的治疗提供新方法。

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