首页> 外文期刊>Journal of Huazhong University of Science and Technology >Influence of Oxidized Low Density Lipoprotein on the Proliferation of Human Artery Smooth Muscle Cells in vitro
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Influence of Oxidized Low Density Lipoprotein on the Proliferation of Human Artery Smooth Muscle Cells in vitro

机译:氧化型低密度脂蛋白对人动脉平滑肌细胞体外增殖的影响

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The effects of oxidized low density lipoprotein (ox-LDL) on the proliferation of cultured human vascular smooth muscle cells (vSMC) were investigated in vitro. By using NaBr density gradient centrifugation, LDL was isolated and purified from human plasma. Ox-LDL was produced from LDL by being incubated with CuSO_4. ox-LDL was then added to the culture medium at different concentrations (35, 60, 85, 110, 135 and 160 μg/mL) for 7 days. The influence of ox-LDL on vSMC proliferation was observed in growth curve, mitosis index, and in situ determination of apoptosis. The data were analyzed with SPSS 10.0 software. The results showed that the ox-LDL produced in vitro had a good purity and optimal oxidative degree, which was similar to the intrinsic ox-LDL in atherosclerotic plaque. ox-LDL at a concentration of 35 μg/mL demonstrated the strongest proliferation inducement, and at a concentration of 135 μg/mL, ox-LDL could inhibit the growth of vSMC. ox-LDL at concentrations of 35 and 50 μg/mL presented powerful mitotic trigger, and with the increase of ox-LDL concentration, the mitotic index of vSMC was decreased gradually. ox-LDL at higher concentrations promoted more apoptotic vSMCs. ox-LDL at lower concentrations triggered proliferation of vSMCs, and at higher concentrations induced apoptosis in vSMCs. ox-LDL played a promotional role in the pathogenesis and development of atherosclerosis by affecting vSMC proliferation and apoptosis.
机译:体外研究了氧化的低密度脂蛋白(ox-LDL)对培养的人血管平滑肌细胞(vSMC)增殖的影响。通过使用NaBr密度梯度离心,从人血浆中分离并纯化了LDL。通过与CuSO_4孵育从LDL产生Ox-LDL。然后将ox-LDL以不同浓度(35、60、85、110、135和160μg/ mL)添加到培养基中7天。在生长曲线,有丝分裂指数和凋亡的原位测定中观察到ox-LDL对vSMC增殖的影响。用SPSS 10.0软件分析数据。结果表明,体外制备的ox-LDL具有良好的纯度和最佳的氧化度,与动脉粥样硬化斑块内在的ox-LDL相似。浓度为35μg/ mL的ox-LDL表现出最强的增殖诱导作用,浓度为135μg/ mL的ox-LDL可以抑制vSMC的生长。浓度为35和50μg/ mL的ox-LDL表现出有力的有丝分裂触发作用,随着ox-LDL浓度的增加,vSMC的有丝分裂指数逐渐降低。较高浓度的ox-LDL促进了更多的凋亡vSMC。较低浓度的ox-LDL触发vSMC增殖,而较高浓度的ox-LDL诱导vSMC凋亡。 ox-LDL通过影响vSMC增殖和凋亡在动脉粥样硬化的发病和发展中起促进作用。

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