葡萄籽提取物抗实验性动脉粥样硬化作用及其机理研究

为探讨葡萄籽提取物抗实验性动脉粥样硬化作用及机理 ,将 5 0只动脉粥样硬化敏感株近交系C5 7BL 6J小鼠 ,随机分为正常对照组、高脂模型组、葡萄籽提取物低、高剂量组和药物对照组 ,正常对照组和高脂模型组 ,每日分别给予普通饲料和高脂饲料 ,葡萄籽提取物组和药物对照组 ,在每日给予高脂饲料的同时 ,分别添加葡萄籽提取物 (0 2mg g、0 6mg g体重 )和普托罗考片 (0 2mg g体重 ) ,实验至第 2 1周末 ,眼球放血处死小鼠 ,检测血清氧化型低密度脂蛋白 (OX LDL)、细胞粘附因子 1(ICAM 1)和一氧化氮 (NO)含量 ,同时取主动脉作病理形态学观察。结果发现 ,葡萄籽提取物组 ,血清OX LDL和ICAM 1水平均高于正常对照组 ,但明显低于高脂模型组 ,血清NO水平 ,则低于正常对照组而高于高脂模型组。观察主动脉部位的形态显示 ,葡萄籽提取物组其血管壁增厚程度、玻璃样改变和泡沫细胞数量均轻于模型组 ,高剂量组效果为佳 ,但仍重于正常对照组。实验结果提示 ,葡萄籽提取物具有减缓C5 7BL 6J小鼠动脉粥样硬化形成的作用 ,这可能与阻抑OX LDL、ICAM 1含量升高减低对血管内皮细胞损伤及保护血管内皮功能等作用有关

Study of anti-atherosclerosic effect of grape seed extract and its mechanism

In order to observe the anti-atherosclerosic effect of the grape seed extract and its mechanism, the 50C57/6J mice are divided randomly into 5 group (normal control group, hyperlipidemia model group, low and high grape seed extract groups(0.2 mg/gBW, 0.6 mg/gBW), and drug control group(0.2 mg/gBW). After twenty-one weeks, plasma oxidized low density lipoprotein (OX-LDL), serum nitric oxide (NO) and intercellular adhesion molecule-1 (ICAM-1) are measured and the form of aortic valves are observed pathologically. The results show that the levels of plasma OX-LDL, and ICAM-1 are significantly lower in grape seed extract group than those in model group while the levels of NO are higher in grape seed extract group than that in model group (P < 0.01). The thickness of aortic valves consisting of foam cell and endothelium hyperplasia in grape seed extract group is lighter than that of model group. The results indicate that the grape seed extract has inhibitary effect on atherosclerosis in C57BL/6J mice, and the possible mechanism may be related to inhibition of the increase of OX-LDL, and ICAM-1, reduction of the damage of vascular endothelium and protection of the function of vascular endothelium.