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1、靶向FAK的siRNA对喉癌细胞增殖及侵袭能力的抑制作用张潜英,叶琳,余晓燕,沈娜,邓碧,吴晓松,陈鸿雁(重庆医科大学附属第一医院耳鼻咽喉科,重庆400016)摘要:目的运用RNA干扰(RNAinterference,RNAi)技术阻断喉癌Hep-2细胞株中FAK基因的表达,并研究FAK基因沉默后对Hep-2细胞株产生的影响。方法针对FAK基因,构建2条干扰重组质粒FAK-pGenesil-CH1和FAK-pGenesil-CH2,1条阴性对照重组质粒FAK-pGenesil-HK;在脂质体的介导下转染喉癌He
2、p-2细胞株,用RT-PCR和Westernblot分析FAKmRNA及蛋白的表达;MTT法、流式细胞技术及体外侵袭实验测定干扰重组质粒对Hep-2细胞株的增殖、侵袭能力的影响。结果重组干扰质粒能有效地阻断Hep-2细胞株中FAK基因在mRNA和蛋白水平上的表达(P<0.05);重组质粒转染Hep-2细胞后,细胞增殖抑制率分别为58.34%、52.78%,与对照组比较差别有统计学意义(P<0.05);干扰组G0~G1期细胞增多,S期细胞数量明显减少(P<0.05);FAK-pGenesil-CH1、FAK-pG
3、enesil-CH2作用Hep-2细胞株48h后,Hep-2细胞穿过Matrigel膜的个数分别为(56.0±6.7)、(51.0±5.1),与阴性对照组及正常对照组[分别为(152.0±9.4)和(139.0±8.1)]比较有统计学差别(P<0.05)。结论干扰重组质粒能有效地抑制转染Hep-2细胞株的FAKmRNA及蛋白的表达,并能抑制Hep-2细胞株的增殖及侵袭能力。关键词:FAK;siRNA;RNA干扰;Hep-2细胞株;增殖;侵袭中图法分类号:R739.65文献标识码:AEffectofFAKgene
4、silencingonproliferationandinvasioninofHep-2cellsZHANGQian-ying,YELin,YUXiao-yan,SHENNa,DENGBi,WUXiao-song,CHENHong-yan(DepartmentofOtolaryngology,theTheFirstAffilatedHospital,,ChongqingMedicalUniversity,,Chongqing400016,,China)Abstract:objectiveObjectiveToo
5、bservetheeffectsofRNAi-mediatedFAKgeneonsilencinginonlaryngealcarcinomaHep-2cells..MethodsConstructrRecombinantplasmidsgeneratingshorthairpinRNAwereconstructed,includingtwointerferentialsequencesFAK-pGenesil-CH1、,FAK-pGenesil-CH2andonenegativecontrolsequence
6、FAK-pGenesil-HK.Hep-2cellsweretransfectedwithrecombinantplasmids..FAKmRNAandFAKproteinwereanalyzedrespectivelybyRT-PCRandWesternblotting,respectively..Cellproliferation、,cellcycleandinvasionofHep-2cellswereobservedbyMTTassay、,flowcytometry(FCM)andtranswellin
7、vasionassay,respectively.ResultsRecombinantplasmidsofFAK-pGenesil-CH1andFAK-pGenesil-CH2downregulatedtheexpressionsofFAKmRNAandprotein(P<0.05);.TheproliferationinhibitionratioinHep-2cellsreachedto58.34%、and52.78%,%48hourshaftertransfectionofrecombinantplasmi
8、dsofFAKpGenesil-CH1、andFAK-pGenesil-CH2,whilethatthecontrolwas8.34%inthecontrol(P<0.05)(P<0.05).;FCManalysisshowedthatmMorecellsstayarrestedatinG0-/G1phaseinthetransfectedgroupsthancontrols;.The