融斑通脉颗粒干预动脉粥样硬化氧化应激作用的实验研究

目的:观察家兔动脉粥样硬化(AS)过程氧化应激的状态,以及融斑通脉颗粒的干预作用.方法:将家兔分为正常对照组和高脂造模组,高脂饲料喂养至4周,将高脂造模组家兔分为高脂对照组、舒降之组和融斑通脉颗粒高、中、低剂量组,连续给药8周.于实验前、给药前、给药4,8周时测定血清中NO,ox-LDL,LP(a),SOD,MDA水平,以及给药8周时测定肝组织MDA,GSH,NO含量和soD,GSH-Px活性,并取主动脉进行病理学检查.结果:高脂饲料喂养12周后,与正常对照组比较,高脂对照组家兔主动脉内膜明显增厚,形成明显的粥样斑块,血清MDA,LP(a)含量均明显增加(P＜0.001),SOD活性及NO含量均明显降低(P＜0.01,P＜0.001);同时第12周后肝脏MDA含量明显高于正常对照组(P＜0.01),SOD活性,GSH和NO含量则均显著降低(P＜0.01,P＜0.001).融斑通脉颗粒干预8周后家兔主动脉粥样斑块病变程度明显减轻,血清中MDA,LP(a)含量明显降低(P＜0.05),SOD活性和NO含量明显上升(P＜0.05);同时肝脏中SOD活性、GSH和NO含量明显升高(P＜0.05),MDA含量明显降低(P＜0.05).结论:抗氧化应激、纠正氧化-还原状态失衡可能是融斑通脉颗粒防治AS的机制之一.

Study of Rongban Tongmai granule on anti-oxidant stress in atherosclerosis

Objective : To observe the therapeutic effects of Rongban Tongmai granule on oxidative stress in atherosclerotic rabbits. Method : The experimental rabbits were randomly divided into control group and hyperlipidemic group. The model of experimental atherosclerosis was prepared by feeding high cholesterol and lipid diet for weeks. After 4 weeks, hyperlipidemic rabbits were randomly divided into five groups, model group, high, medium and low doses of Rongban Tongmai granule and Shujiangzhi group, taking medicine for 8 weeks. The level of NO, ox-LDL, LP(a), SOD and MDA in the serum was measured before experiment, after treatment, treated for 4 weeks and for 8 weeks. After treated for 8 weeks, the level of MDA, GSH and NO, as well as activity of SOD and GSH-Px in the liver of rabbits was determined, meanwhile, the pathologic morphology of aortas was observed by light microscope. Result : Compared with control group, aortic intima of rabbits in model group had obviously thickened and developed atherosclerotic plaque. The serum level of MDA and LP(a) in model group had increased(P<0.01) at 12 weeks after feeding high cholesterol and lipid diet, but the activity of SOD and level of NO were decreased (P<0.01, P<0.001). At the same time, the level of MDA in the liver had been elevated (P<0.01), but the activity of SOD, GSH and NO was decreased (P<0.01, P<0.001) in 12 weeks. Rongban Tongmai granule could inhibit atherosclerotic lesion in aorta, decrease the level of MDA and LP(a) (P<0.05), increase the activity of SOD and NO(P<0.05) after treated for 8 weeks in serum, moreover, the activity of SOD, GSH and NO content in the liver were increased(P<0.05), as well as MDA was decreased(P<0.05). Conclusion : Rongban Tongmai granule can prevent atherosclerosis by antioxidative stress and correcting unbalance of redox.