摘要
目的研究血浆脂蛋白水平变化与主动脉内膜增生程度的相关性,探讨动脉粥样硬化形成的机制。方法以高酯饲料喂养复制家兔实验性动脉粥样硬化(AS)模型,分阶段(0、33、100d)检测家兔血清总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-c)和低密度脂蛋白胆固醇(LDL-c)水平;观察主动脉内膜病理学变化。测量主动脉内膜厚度并计算其与主动脉直径(AD)的比值(AIT/AD),分析AIT/AD与LDL-c、HDL-c、TC和TG水平的相关性。结果高脂组家兔主动脉内膜脂斑脂纹及粥样灶形成,分别占主动脉内膜总面积的46.20%和22.1%;主动脉内膜平均厚度(AIT)为(1.73±0.79)μm2,占主动脉外径的8.03%,明显比对照组增加(P<0.01)。AIT/AD与血浆TC、LDL-c水平呈显著正相关(r=0.644、0.637,P<0.01),AIT/AD与LDL-c呈极显著回归关系(b=0.06,P<0.01)。结论提示血浆LDL-c水平的升高,是AS发生发展的重要因素。
[Objective] To Study the correlation between plasma lipids and aortic intimal thickness from the experimental model of atheroselerosis (AS) and hyperlipidemia in cholesterol-fed rabbits. [Methods] The New Zealand white rabbits were randomized into two groups: AS group and control group. The changes of total cholesterol (TC), triglyceride (TG), high density lipoprotein eholesterol(HDL-c),low density lipoprotein eholesterol(LDL-c) in serum were detected by stages. The aortic intimal thickness were measured and (aortic intimal thickness/ aortic diameter ) ratio were analysed. [Results] It was measured that the areas of aortic intimal hyperplasia and the AS were 46.20% and 22.1% of the total area of the aortic intimal, respectively; the AIT was signifieandy increased (P 〈0.01) in AS group compared with the control group. The AIT'was positively correlated with the TC and the LDL-c level in serum (r =0.644, 0.637, P 〈0.01), and multivariate regression analysis revealed that the LDL-c was the more significant variable associated with AIT/AD (b =0.06, P 〈0.01) compared with either TC or TG. [Conclusion] The results suggest that the higher level of plasma LDL-c may be the reason of AS in experimental model of AS and hyperlipidemia in rabbits.
出处
《中国现代医学杂志》
CAS
CSCD
北大核心
2005年第14期2100-2103,共4页
China Journal of Modern Medicine
关键词
动脉粥样硬化
低密度脂蛋白胆固醇
家兔
atheroselerosis
low density lipoprotein cholesterol(LDL-c)
rabbits