通心络对动脉粥样硬化模型兔内皮功能、CD40及CD40L表达的影响

目的 观察通心络对动脉粥样硬化家免模型的预防治疗作用,并探讨其对内皮功能、CD40及CD40L mRNA表达的影响.方法 选取60只雄性健康家兔,随机分为对照组、模型组、通心络组三组,每组20只,后两组家兔分别通过高脂饮食制备动脉粥样硬化模型.给药处理前及12周后分别测定以下指标：血浆总胆固醇（TC）、甘油三酯（TG）和高密度酯蛋白胆固醇（HDL-C）的浓度;主动脉内膜/中膜厚度比值及粥样斑块面积;测定血清内皮素（ET）水平和血清一氧化氮（NO）水平;运用定量逆转尿PCR技术（RT-PCR）测定外周血单核细胞中CD40及CD40L mRNA的表达水平.结果 模型组和通心络组家免的TC水平均显著高于对照组（P〈0.01）,通心络组又低于模型组（P〈0.05）;通心络组血清ET水平和ET/NO显著降低（P〈0.05,P〈0.01）,血清NO水平显著升高（P〈0.01）;通心络组中,家兔的主动脉内膜/中膜厚度比值及斑块面积占血管总面积百分率均明显低于模型组[（0.56±0.07）与（1.16±0.08）,P〈0.01;（36.88±2.38）%与（76.58±2.86）%,P〈0.01];与模型组（0.798±0.115）、（0.592±0.132）比较,通心络组家兔外周血单-核细胞中的CD40及CD40L mRNA表达量明显降低[（0.686±0.132）、（0.498±0.108）]（P〈0.01）.结论 通心络可抑制动脉粥样硬化斑块的形成,其机制可能下调CD40及CD40L表达及有效地改善内皮功能有关.

Effects of Tongxinluo capsule on endodermis function and the expression of CD40, CD40L in artherosclerosis rabbits

Objective To investigate the therapeutic effects of Tongxinluo and its influence on the expression of CD40 and CD40L in artherosclerosis rabbits. Methods 60 male rabbits were divided into three groups randomly,20 of each group: normal control group, model group and Tongxinluo group. The rabbits in model group and Tongxinluogroup were used to prepare the atherosclerosis model induced by high-cholesterol diet. The levels of ET-1, NOwere measurde. Before and 12 weeks after durg treatment,serum total cholesterol ,plaque areas and ratios of intima/media thickness were detected. The expression of CD40 and CD40L mRNA were determinated by quantitive RT-PCR. Results Serum total cholesterol level of Tongxinluo group was decreased compared with model group ( P < 0. 05 ), and they were both much higher than those of normal control group ( P < 0. 01 ); as compared with the model group, aortic plaque areas and ratios of intima/media thickness in Tongxinluo group reduced significantly [ (0.56 ± 0. 07) vs ( 1.16±0.08),P<0.01;(36.88±2.38)% vs (76.58 ±2.86) %,P <0. 0l] ;The expression of CD40 and CD40L mRNA also decreased in Tongxinluo group with statistic significance[ (0.798 ± 0.115 )、 (0. 592 ± 0. 132) vs (0.686±0. 132) 、(0.498 ±0. 108) ,P <0. 01 ) ]. Conclusion Tongxinluo had the ability to anti-artherosclerosis and its possible mechanism was down-regulate the expression of CD40 and CD40L.