【摘要】 目的观察不同剂量厄贝沙坦(Irb)对血管紧张素Ⅱ(AngⅡ)介导的肾小球系膜细胞(MCs)增殖及细胞周期的影响,探讨Irb抑制MCs增殖的可能机制。方法分离培养大鼠MCs,用10-6mol/LAngⅡ刺激MCs,将培养的大鼠MCs随机分为空白对照组、AngⅡ刺激组、高浓度Irb组(10-5mol/L)、中浓度Irb组(10-6mol/L)、低浓度Irb组(10-7mol/L)。采用四甲基偶氮唑盐(MTT)法及流式细胞术检测大鼠MCs增殖及细胞周期的变化。结果AngⅡ刺激组A值显著高于空白对照组,而高、中、低浓度Irb组A值均明显低于AngⅡ刺激组,且浓度越高作用越明显;AngⅡ刺激组较其他各组G0/G1降低,(S+G2)/M升高,而高、中、低浓度Irb组较AngⅡ刺激组G0/G1明显上升、(S+G2)/M明显降低,且浓度越高作用越明显;10-7～10-5mol/LIrb对MCs无明显细胞毒性作用。结论Irb可能是通过阻断AT1R介导的MCs的有丝分裂、增生及蛋白合成,从而抑制MCs的增殖。更多还原

【Abstract】 Objective To investigate the effect of Irbesartan on the proliferation of mesangial cells(MCs)induced by angiotensin Ⅱin rats.Methods The MCs from healthy SD rats were cultured in vitro and divided into five groups: control group,AngⅡ group and 3 groups with various doses of Irbesartan.The proliferation of MCs was measured by MTT method and the cell cycle was observed by flow cytometry.Results Irbesartan inhibited AngⅡ-induced proliferation of rat MCs;Irbesartan also down-regulated(S+G2)/M phase of MCs.Both effects showed a dose dependent relationship.Conclusion Irbesartan can inhibit proliferation of rat MCs,which is associated with decreased DNA synthesis.更多还原