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《小分子干擾RNA下調(diào)星形細胞上調(diào)基因1表達對肝癌細胞增殖和凋亡的影響-論文.pdf》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在應用文檔-天天文庫。
1、·982·中華實驗外科雜志2014年5月第31卷第5期ChinJExpSurg,May2014,Vo1.3l,N0.5·實驗研究·小分子干擾RNA下調(diào)星形細胞上調(diào)基因1表達對肝癌細胞增殖和凋亡的影響王宏偉段長虹秦瑞英李偉偉侯麗娟段樹鵬申保生郝潔楊玉新【摘要】目的探討小分子干擾RNA(siRNA)下調(diào)星形細胞上調(diào)基因1(AEG—1)表達對肝癌細胞增殖和凋亡的影響及其機制。方法用設計合成的AEG一1siRNA轉(zhuǎn)染人肝癌細胞HepG2細胞株,實時熒光定量逆轉(zhuǎn)錄聚合酶鏈反應(FQ—PCR)技術(shù)檢測HepG2細胞AEG一1mRNA的表達;噻唑藍(MTr)法檢測HepG2細胞的增殖;
2、流式細胞術(shù)檢測AEG—lsiRNA對HepG2細胞凋亡和細胞周期的影響。結(jié)果AEG.1siRNA組AEG一1mRNA表達(0.43±0.04)明顯低于空白對照組(0.96±0.09)和陰性對照組(0.94±0.08)(P<0.01);培養(yǎng)72h后AEG—lsiRNA組HepG2細胞吸光度(A)值(1.25±0.08)明顯低于空白對照組(2.644-0.14)和陰性對照組(2.494-0.14,P<0.O1);AEG一1siRNA組HepG2細胞凋亡率(19.24-3.8)%明顯高于空白對照組(5.34-1.4)%和陰性對照組(5.64-1.6)%(P<0.01);AEG一
3、1siRNA組HepG2細胞在DNA合成前期(Go/G.期)細胞比率[(61.38±2.31)%]明顯高于空白對照組[(41.244-1.97)%]和陰性對照組[(42.154-1.64)%,P<0.01],而在合成期(S)[(25.364-1.21)%]及合成后期(G/M)[(13.26±0.97)%]分別低于空白對照組[(33.604-1.24)%、(25.164-0.79)%]和陰性對照組[(32.524-1.23)%、(25.33±0.86)%,P<0.01]。結(jié)論siRNA可通過下調(diào)HepG2細胞AEG一1基因的表達,抑制HepG2細胞的增殖,并促進其凋亡。【關(guān)
4、鍵詞】星形細胞上調(diào)基因1;肝癌;小干擾RNA;細胞凋亡Efectofdown-regulationofastrocyteelevatedgene·-1expressionbysmallinterferingRNAinhibitscellproliferationandinducesapoptosisinhumanhepat0celIularcarcinomaHepG2cellsWangHongwei,DuanChanghong,QinRuiying,LiWeiwei,HouL~uan,DuanShupeng,ShenBaosheng,HaoJie,YangYuxin.De
5、partmentofInfectionDiseases,theFirstAffiliatedHospitalofXinxiangMedicalUniver—sity,Weihui453100,ChinaCorrespondingauthor:WangHongwei,Email:relanglO0@aliyun.com【Abstract】ObjectiveToinvestigatetheeffectofsmallinterferingRNA(siRNA)一inducedastro—cyteelevatedgene一1(AEG一1)down—regulationonthepr
6、oliferation,apoptosisandcellcycleofhumanhep—atocellularcarcinomacellsanditsmechanism.MethodssiRNAandAEG一1siRNAweretransfectedtoHumanhepatocellularcarcinomaHepG2ceils.respectively.TheexpressionofAEG一1mRNAwasdetectedbyrea1.timefluorescentquantitativereversetranscription—polymerasechainreact
7、ion(FQ—PCR).Thecellproliferationwasdetectedbymethylthiazoltetrazolium(MTF)method.Theapoptosisandcellcyclewereanalyzedbyflowcytometry.ResultsExpressionofAEG一1mRNAinAEG一1siRNAgroup(0.43±0.04)wassignificantlylowerthanthatincontrolsiRNAgroup(0.944-0.08)andcontrolgroup(0