新型katp开放剂埃他卡林对原代培养人肺动脉平滑肌细胞pcna mrna表达的影响

目的:观察新型ATP敏感性钾通道(KATP)开放剂埃他卡林(IPT)对原代培养人肺动脉平滑肌细胞增殖细胞核抗原(PCNA)mRNA表达的影响。方法:分离3～4级人肺小动脉,按照组织贴块法原代培养人肺动脉平滑肌细胞,分成对照组、缺氧组、缺氧+埃他卡林或吡那地尔组及缺氧+埃他卡林或吡那地尔+格列本脲组,应用实时荧光定量逆转录聚合酶链反应(FQ-RT-PCR)技术检测细胞PCNA mRNA表达。结果:缺氧使人肺动脉平滑肌细胞PCNA mRNA表达增加(3.90±0.24)倍,与对照组比较差异有显著性(P<0.01);相同条件下,在缺氧的同时,分别在培养液中加入IPT 10-7、10-6、10-5 mol/L,PCNA mRNA表达分别下降(26.00±2.01)%、(55.33±4.04)%、(79.00±1.00)%,与缺氧组比较差异均有显著性(P均<0.01);加入IPT 10-5mol/L前30 min,预先加入格列本脲(GLI)10-5 mol/L,IPT的抑制作用抵消,与缺氧+IPT 10-5 mol/L组比较差异有显著性(P<0.01)。结论:IPT通过激活细胞KATP通道,浓度依赖性地抑制缺氧时原代培...

effect of iptakalim,a novel katp opener,on the expression of proliferating cell nuclear antigen mrna in primary cultured human pulmonary artery smooth muscle cells

Objective: To investigate the effect of iptakalim(IPT),a novel ATP sensitive potassium(KATP) opener,on the expression of proliferating cell nuclear antigen(PCNA) mRNA in primary cultured human pulmonary artery smooth muscle cells.Methods:Under germfree conditions,the smooth muscular layers were separated from human pulmonary arterioles(3rd~4th divisions).Human pulmonary artery smooth muscle cells were cultured by tissue block method and were divided into following groups:control group,hypoxia group,hypoxia+...