普罗布考对糖尿病大鼠动脉粥样硬化的影响及机制

目的 观察普罗布考对实验性糖尿病大鼠动脉粥样硬化的影响,探讨相关机制.方法 40只大鼠分为对照组和模型组,模型组腹腔注射STZ制造模型.成模大鼠随机分成糖尿病组和普罗布考组,高脂高糖饲料喂养,普罗布考组每日予以普罗布考灌胃.8周后处死采血测血脂、丙二醛、超氧化物歧化酶、8-异前列腺素F2α(8-iso-PGF2α)、血小板内皮细胞黏附分子1;光镜下观察主动脉病变,免疫组织化学测血小板内皮细胞黏附分子1表达.结果 模型组较对照组血糖、饮水量、体重升高(P<0.01),总胆固醇、甘油三酯、低密度脂蛋白升高(P<0.01),高密度脂蛋白下降(P<0.01),光镜下主动脉内膜厚度增加(P<0.01),有脂斑突向管腔.与糖尿病组比较,普罗布考组总胆固醇、低密度脂蛋白降低(P<0.01),高密度脂蛋白、甘油三酯差异无显著性(P>0.05);光镜下内膜厚度降低(P<0.01),内膜结构较清晰完整.与对照组比较,糖尿病组大鼠丙二醛、8-异前列腺素F2α增加(P<0.01),丙二醛降低(P<0.01),血小板内皮细胞黏附分子1升高(P<0.01),主动脉血小板内皮细胞黏附分子1表达上升(P<0.05).普罗布考干预后,丙二醛、8-异前列腺素F2α下降(P<0.01),超氧化物歧化酶升高(P<0.01),血小板内皮细胞黏附分子1下降(P<0.01),主动脉血小板内皮细胞黏附分子1表达下降(P<0.01).结论 普罗布考减轻实验性糖尿病大鼠的主动脉粥样硬化病变,其保护作用可能与抗氧化应激,抑制主动脉血小板内皮细胞黏附分子1表达有关.

The Effect and Its Related Mechanism of Probucol on the Atherosclerosis of Diabetic Rats

Aim To observe the effect of probucol on the atherosclerosis of experimental diabetic rats,and study its related mechanism. Methods Fourty rats were randomly divided into two groups,normal control group and the model group.Streptozotocin(STZ)was injected intraperitoneally to establish experimental diabetic rat models.Twenty-two rats became diabetes successfully and were randomly divided into two groups: diabetes group,probucol treatment group.After 8 weeks,all rats were executed,and the level of blood gluco...