简介：Objective:Squamousesophagealcarcinomaishighlyprevalentindevelopingcountries,especiallyinChina.TuBeiMu(TBM),atraditionalfolkmedicine,hasbeenusedtotreatesophagealsquamouscellcarcinoma(ESCC)foralongterm.tubeimosideI(TBMS1)isthemaincomponentofTBM,exhibitinggreatanticancerpotential.Inthisstudy,weinvestigatedthemechanismofTBMS1cytotoxiceffectonEC109cells.Methods:Comparativenuclearproteomicapproachwasappliedinthecurrentstudyandweidentifiedseveralalteredproteinspots.Furtherbiochemicalstudieswerecarriedouttodetectthemitochondrialmembranepotential,cellcycleandcorrespondingproteins’expressionandlocation.Results:SubcellularproteomicstudyinthenucleusfromEC109cellsrevealedthatalteredproteinswereassociatedwithmitochondrialfunctionandcellproliferation.FurtherbiochemicalstudiesshowedthatTBMS1-inducedmoleculareventswererelatedtomitochondria-inducedintrinsicapoptosisandP21-cyclinB1/cdc2complex-relatedG2/Mcellcyclearrest.Conclusions:ConsideringtheconventionalapplicationofTBMinesophagealcancer,TBMS1thereforemayhaveagreatpotentialasachemotherapeuticdrugcandidateforESCC.

简介：目的：通过构建DKK1的靶向小干扰RNA（smallinterferingRNA）,探讨干扰DKK1基因的表达和对食管癌ECA109及EC1细胞系增殖的影响。方法：转染DKK1siRNA于食管癌细胞系ECA109、EC1,应用蛋白免疫印迹方法检测转染前后细胞中DKK1的蛋白表达变化。食管癌细胞系ECA109及EC1成功干扰DKK1表达后,应用CCK-8法检测癌细胞增殖变化,平板克隆法检测癌细胞的克隆形成能力变化。结果：食管癌细胞系转染DKK1siRNA后,ECA109中DKK1蛋白表达降低48.62%（P〈0.01）,EC1中DKK1蛋白表达降低50%（P〈0.01）。在CCK-8法检测癌细胞增殖变化实验中,DKK1siRNA转染后24h、48h及72h,相比阴性对照组,细胞增殖能力显著降低。平板克隆实验中,DKK1siRNA转染后,ECA109细胞克隆均数（77.53±4.948）低于空白对照组（44.2±7.704）,克隆率下降42.98%,而EC1细胞克隆均数（71.67±5.239）低于空白对照组（36±2.646）,克隆率下降49.76%。结论：干扰DKK1的表达能够抑制食管癌细胞的增殖,DKK1可能成为抑制食管癌增殖的分子靶点。