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时间:2018-08-01
《反义at1r 重组腺病毒对人肺动脉平滑肌细胞增殖的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、反义AT1R重组腺病毒对人肺动脉平滑肌细胞增殖的影响作者:许大国,朱润庆,涂明利 [摘要]目的:研究腺病毒介导反义AT1RcDNA转染对人肺动脉平滑肌细胞(PASMCs)增殖的影响。方法:构建重组反义人AT1R腺病毒(AdCMVahAT1)和表达β-半乳糖苷酶的对照载体AdCMVLacZ,将培养的PASMCs分为DMEM组、ATⅡ组、AdCMVLacZ+ATⅡ组和AdCMVahAT1+ATⅡ组,分别给予相应的干预因素,用RT-PCR和免疫组化检测AT1R的表达,用流式细胞仪检测各组PASMCs的增殖
2、指数。结果:转染病毒后48hAT1R蛋白表达在AdCMVahAT1组显著低于AdCMVLacZ组和DMEM组。给予ATⅡ刺激48h,ATⅡ组PASMCs的增殖指数(59.69±3.46)高于DMEM组(50.25±1.34,P<0.01),转染AdCMVahAT1后再用ATⅡ刺激48h的AdCMVahAT1+ATⅡ组PASMCs的增殖指数(24.67±3.19)则显著低于3个对照组(P<0.01),而AdCMVLacZ+ATⅡ组(59.53±3.26)和ATⅡ组比较无显著性差异。结论:反
3、义AT1R通过抑制AT1R的表达而抑制PASMCs增殖。 [关键词]反义AT1R;肺动脉;平滑肌细胞;增殖 Abstract:ObjectiveToinvestigatetheinfluenceofhumanangiotensinⅡ(ATⅡ)type1receptor(AT1R)antisensecDNA(ahAT1)onproliferationofculturedhumanpulmonaryartery12smoothmusclecells(PASMCs).MethodsTworecombi
4、nantadenoviralvectors,AdCMVahAT1containingfulllengthantisensecDNAtargetingtohumanAT1RmRNA,andAdCMVLacZcontainingLacZ,wereconstructedbyorientationcloneandhomologousrecombination.ThePASMCswasdividedinto4groups(DMEM,ATⅡ,AdCMVLacZ+ATⅡandAdCMVahAT1+ATⅡ)andc
5、orrespondinginterventionweregiventodifferentgroups,respectively.AT1RexpressionwasdetectedbyRT-PCRandimmunohistochemistrymethod.Proliferationindex(PI)weredeterminedbyflowcytometry.ResultsAftertransfected48h,AT1RexpressionwassignificantlylessinPASMCstran
6、sfectedAdCMVahAT1thanthatingroupDMEMandingroupAdCMVLacZ(P<0.01).StimulatedbyATIIfor48h,ingroupATⅡthePIofPASMCsmarkedlyincreased(P<0.01VsgroupDMEM).However,ingroupAdCMVahAT1+ATⅡ,PIofPASMCsmarkedlydecreased(P<0.01VsgroupATⅡandgroupDMEM,respectiv
7、ely).TherewerenosignificantdifferencesofPIbetweengroupAdCMVLacZ+ATⅡandgroupATⅡ.ConclusionHumanAT1receptorantisensecDNAmaydecreaseproliferationinhumanPASMCsbyinhibitingAT1Rexpression. Keywords:AntisenseAT1R;Pulmonaryartery;Smoothmusclecell;Proliferatio
8、n12 肺动脉平滑肌细胞(PASMCs)肥大增殖,肌型血管中层增厚,非肌型血管向肌型转化,是肺血管重建、肺动脉高压(PAH)形成的重要环节[1]。血管紧张素Ⅱ(ATⅡ)是PASMCs结构和功能异常及肺动脉重建的关键因子之一,其作用主要通过其1型受体(AT1R)而实现[2]。研究表明,FAK[3]、BMP[4]、DCA[5]可以抑制PASMCs增殖,从而逆转PAH的血管重建。然而,重组腺病毒介导反义AT1R对PASMCs的增殖的影响报道较少,我们对此进行了研究,报道如
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