糖耐康对大鼠胸主动脉血管内皮生长因子蛋白表达的影响

目的 通过对自发性2型糖尿病GK大鼠干预治疗,观察并探讨中药复方糖耐康对糖尿病大血管病变的保护作用.方法 将51只GK大鼠随机分为模型组、吡格列酮组、中药糖耐康低、中、高剂量组共5组.另设10只Wistar大鼠为正常组.灌胃8周后,观察大鼠精神状态、体重、饮水量、活动情况,每周监测体重变化,每4周监测空腹血糖变化.HE染色观察胸丰动脉病理改变,免疫组化法测定胸主动脉血管内皮生长因子(VEGF)蛋白表达.结果 模型组空腹血糖显著升高,24 h饮水量明显增加,体重增长变缓,各治疗组上述情况均有不同程度改善.HE染色高倍镜下,模型组动脉壁内膜增厚,内皮细胞肿胀脱落,内弹力板呈波浪状或交织状排列,有断裂,中膜浅层平滑肌增生、排列紊乱.各治疗组上述病理改变均有不同程度减轻.免疫组化图像分析结果显示,与模型组相比较,各治疗组主动脉VEGF蛋白表达均显著降低(P<0.01).结论 中药复方糖耐康可能通过下调GK大鼠胸主动脉VEGF蛋白表达而发挥大血管保护作用.

Influence of TangNaiKang on VEGF protein expression of GK rats thoracic aorta

Objective To investigated the effect of TangNaiKang (TNK) on VEGF protein expression of GK rats Thoracic aorta. Methods 51 male GK rats were divided into five groups randomly: model group, pioglitazone group, and TNK treatment group (low, immediate and high dose). Another 10 male Wistar rats were served as normal control group. GK rats were fed with high-grease forage, while normal control group was fed with a standard diet. Fasting blood glucose, general HE staining and VEGF protein expression were detected by immunohistochemistry. Results The fasting glucose had a significant decline in TNK treatment groups. HE staining showing TNK can ameliorate intima thickness, reduce hyperplasia of shallow vascular smooth muscle cell, and improve wavy and plexiform arrangement of elastic lamina. Immunohistochemistry also showed that TNK decreased VEGF protein expression of great vessels. Conclusion TangNaiKang can prevent and cure diabetic vascular complication of GK rats.