C反应蛋白激活单核细胞核因子-кB及辛伐他汀干预

目的:观察C反应蛋白(CRP)刺激人外周血单核细胞核因子-κB(NF-κB)活化及白细胞介素-6(IL-6)表达,予辛伐他汀干预,探讨CRP/NF-κB在动脉粥样硬化(AS)致病机制中的作用和辛伐他汀的抗AS效应。方法:密度梯度离心法分离人外周血单核细胞,免疫细胞化学观察CRP致单核细胞NF-κBp65活化的时间效应,ELISA法观察IL-6产生的时间-浓度效应,其峰值分别与辛伐他汀抑制剂组比较。结果:CRP刺激单核细胞NF-κB活化呈时间依赖性,高峰在2h,单核细胞表达IL-6呈时间与浓度依赖性,在24h达高峰。辛伐他汀(1×10-8mol/L～1×10-6mol/L)呈剂量依赖性抑制NF-κB活化与IL-6表达。结论:CRP激活正常人单核细胞NF-B信号途径,并诱导单核细胞产生IL-6,辛伐他汀抑制单核细胞NF-κB活性与IL-6表达,提示CRP/NF-κB信号途径在促进AS发病机制中起重要作用,辛伐他汀抑制NF-κB有可能减轻或抑制AS进展。

Nuclear factor-B activation in human monocytes stimulated with c-reactive pr otein and inhibited by simvastatin

Objective To observe the influence of c reactive protein(CRP)on nuclear factor κB(NF κB)activation and interleukin 6(IL 6) production i n human monocytes, and the effect of simvastatin intervention on the factors abo ve,toinvestigate the role of CRP/NF κB in atherosclerosis and evaluate the me chanisms of simvastatin on anti atherosclerosis. Methods Monocytes was isolated from blood of healthy volunteers by the Ficoll density gradient and stimulated b y broad concentrations of CRP (1～20 mg/L) at indicated t...