简介:AIMTocompareKAI1incancerofpapillaofVaterandpancreastoevaluatewhethertherearedifferencesinbiologicbehaviorwhichmightaccountforprognosis.METHODSWecomparedtheexpressionin24papillayand29pancreaticcancersusingNorthernblotanalysis,immunochemicalassayandinsituhybridization,andinvestigatedwhetherearlydiagnosisormoleculardifferencespredicttheoutcomeinthesetumorentities.RESULTSByNorthernblotanalysisthereisnostatisticaldifferenceofKAI1levelsinnormalandcancerouspapilla.NoassociationbetweenKAI1mRNAexpressionandtumorstageortumordifferentiationwasfoundinthetumors.Byimmunohistochemicalassay,KAI1stainingincytoplasmofpapillarycancercellswassimilartothatofnormalpapillarycells.Byinsituhybridization,theresultsofKAI1mRNAexpressioninnormalandcancerouspapillaweresimilartothosewithimmunohistochemicalassay.Thenormalandcancerouspancreastissueswerealsoanalyzedbythemethodsusedinpapillarysamples.CONCLUSIONAlthoughthebiologicrolesofKAI1havenotbeenclarified,ourresultssuggestthatKAI1mayrestricttheprogressionofmalignantpapillarycancer,butitsexpressionmightnothaveanyeffectonthecharacteristicsofpapillarytumor,whereasbytheanalysisofKAl1gene,itsreducedexpressioniscloselyrelatedtotheprogressionandmetastasesofpancreaticcancer.
简介:背景:研究表明GEF-H1能激活Rho蛋白,与肿瘤发生、发展、浸润、迁移等密切相关。目的:构建人pEGFP-GEF-H1载体并稳定转染结肠癌HCT116细胞后检测GEF-H1表达。方法:在线合成引物软件设计人GEF-H1基因引物,构建重组质粒pEGFP-GEF-H1,并转染结肠癌HCT116细胞,以转染空质粒和未转染的细胞分别作为空质粒组和空白对照组。荧光显微镜下观察绿色荧光蛋白表达,RT-PCR和蛋白质印迹法分别检测GEF-H1mRNA和蛋白表达水平。结果:成功构建了人pEGFP-GEF-H1载体,测序结果表明序列正确。转染重组质粒pEGFP-GEF-H1后,荧光显微镜下可见较强的绿色荧光,GEF-H1mRNA和蛋白表达水平均较空质粒组和空白对照组明显上调。结论:体外成功构建了人pEGFP-GEF-H1载体,且转染结肠癌HCT116细胞后高表达GEF-H1,为进一步探讨结肠癌与GEF-H1的关系提供了必要的实验材料。
简介:AIM:Helicobacterpylori(Hpylori)hasbeenlinkedtochronicgastritis,pepticulcer,gastriccancerandMALT-lymphoma.ThelinkofgenotypesofHpyloritogastriccancerremainscontroversial.TheaimofthisstudywastoinvestigatetheHpylorivacAalleles,cagAandiceAinpatientswithgastriccancerinTaiwan.METHODS:Patientswithgastriccancer,pepticulcerandchronicgastritiswereenrolledinthisstudy.Weobtainedbiopsyspecimensfromthestomachatleast2cmawayfromthetumormargininpatientswithgastriccancer,andfromtheantrumofstomachinpatientswithpepticulcerorchronicgastritis.DNAextractionandpolymerasechainreactionwereusedtodetectthepresenceorabsenceofcagAandtoassessthepolymorphismofvacAandiceA.RESULTS:Atotalof168patients(gastriculcer:77,duodenalulcer:66,andchronicgastritis:25)werefoundtohavepositivePCRresultsofthebiopsyspecimensfrompatientswithpepticulcerandchronicgastritis.WefoundpositivecagA(139/168,83%),m2(84/168,50%)andiceA1(125/168,74%)strainsinthemajorityofpatients.Inpatientswithgastriccancer,thevacAslaandslcsubtypeswerelesscommonlyfoundthanthoseinnon-cancerpatients(35/66vs127/168,P=0.0001forslaand13/66vs93/168,P<0.0001forslc).Inthemiddleregion,themlTstraininpatientswithgastriccancerwasmorethanthatofnon-cancerpatients(23/66vs33/168,P=0.02).CONCLUSION:InTaiwan,HpyloriwithpositivevacAsla,cagAandiceA1strainsarefoundinthemajorityofpatientswithgastriccancerornon-cancerpatients.Inpatientswithgastriccancer,thevacAs1aandslcsubtypesarelessandm1Tismorethaninpatientswithpepticulcerandchronicgastritis.
简介:目的:探讨多药耐药相关蛋白(MRP1)在食管鳞癌组织中的表达与放射治疗的疗效及预后的关系。方法:运用免疫组化方法检测68例食管鳞癌患者胃镜活检标本中,MRP1在食管鳞癌组织及癌旁正常食管黏膜组织中的表达差异。同时观察所有患者放疗的近期疗效,随访患者的2年生存率。结果:食管鳞癌组织中的MRP1表达率为52.94%,高于癌旁正常食管黏膜组织30.88%,差异有统计学意义(P=0.01)。MRP1高表达组患者的放疗有效率为72.22%,低于MRP1低表达组患者93.75%,差异有统计学意义(P=0.02)。两组患者的2年生存率无明显差异(P=0.65)。结论:MRP1在食管鳞癌的表达水平与放疗的敏感性相关,MRP1可能对食管鳞癌放疗的疗效判断有重要意义。
简介:瞄准:观察效果是在老鼠肝细胞的cyclinD1表示上的化学家preconditioning在期间早是化学家灌注。方法:54只SD老鼠随机被划分成是preconditioning组(IP),ischemia/reperfusion组(红外)和假冒的操作组织的化学家(那么)。IP和红外组进一步被划分成四亚群(n=6)。假冒的操作组(那么)担任了控制组(n=6)。部分肝ischemia/reperfusion的一个模型被使用,在哪个老鼠在灌注以前为60min受到肝局部缺血。在IP组的动物经历了在ischemia/reperfusion挑战以前每次为5min是化学家preconditioning两次。在灌注的0,1,2,和4h以后,在每个组的浆液和肝织物被收集检测浆液中高音,肝组织病理学说和cyclinD1mRNA和蛋白质的表示的水平。流动血细胞计数被用来作为房间新生的数量指示物检测房间周期。结果:与红外组相比,IP组在1h显示出显著地更低的中高音水平到4h亚群(P<0.05)。增长索引(PI)由S阶段和G2/M-phase比率显示了[(S+G2/M)/(G0/G1+S+G2/M)]显著地在0和1h在IP组被增加(26.44+/-7.60%对18.56+/-6.40%,41.87+/-7.27%对20.25+/-6.70%,P<0.05)。同时,cyclinD1蛋白质表示能在IP组被检测。但是在红外组,,cyclinD1蛋白质表示发生了在灌注以后的2h。在IP显著地增加的cyclinD1mRNA的表示在0和1h组织(0.568+/-0.112对0.274+/-0.069,0.762+/-0.164对0.348+/-0.093,P<0.05)。结论:局部缺血preconditioning能保护肝细胞免于ischemia/reperfusion损害,它可能早与房间增长和cyclinD1的表示有关在期间是化学家灌注。
简介:Ithasbeenfoundthatexpressionof15-lipoxygenasc-1(15-LOX-1)anditsmainproduct,13-C-hydroxyoctadecadienoicacid(13-S-HODE),aredecreasedinhumancolorectalandesophagealcancersandthatnonsteroidalanti-inflammatorydrugs(NSAIDs)cantherspeuticallyinduce15-LOC-1expressiontotriggerapoptosisinthosecancercellsindependentlyCOX-2.WefoundthataspecificCOX-2inhibitorSC-236similarlyinduceapoptosisingastriccancercells,althoughthemechanismsoftheseeffectsremaintobedefined.Inthepresentstudy,wetestedwhetherSC-236inducedapoptosisthroughup-regulationof15-LOX-1ingastriccancercells.Wefoundthat,(a)SC-236inhibitedgrowthofgastriccancercellsmainlybyapoptosisinduced;(b)SC-236induced15-LOX-1expressionandincreasedendogenous13-S-HODEproduct,insteadof15-S-HETEduringapoptosisingastriccancercellswithout15-LOX-1expressionbeforetreatmentbySC-236;(c)sc-236didn'teffectexpressionofCOX-1,COX-2,5-LOXand12-LOX;and(d)15-LOX-1inhibitionsuppressedSC-236inducedapoptosis.ThesefindingsdemonstratedthatSC-236inducedapoptosisingastriccancercellsviaup-regulationof25-LOX-1.Theyalsosupporttheconceptthatthelossoftheproapopoticroleof15-LOX-1inepithelialcancersisnotlimitedtohumancolorectalandesophagealcancers.
简介:AIM:Toanalyzethemismatchrepair(MMR)statusandtheARID1Aexpressionaswellastheirclinicopathologicalsignificanceingastricadenocarcinomas.METHODS:WeexaminedtheexpressionsofMMRproteinsandARID1Abyimmunohistochemistryinconsecutive489primarygastricadenocarcinomas.Theresultswerefurthercorrelatedwithclinicopathologicalvariables.RESULTS:ThelossofanyMMRproteinexpression,indicativeofMMRdeficiency,wasobservedin38cases(7.8%)andwassignificantlyassociatedwithanolderage(68.6±9.2vs60.4±11.7,P<0.001),afemalesex(55.3%vs31.3%,P=0.004),anantrallocation(44.7%vs25.7%,P=0.021),andadifferentiatedhistology(57.9%vs39.7%,P=0.023).AbnormalARID1Aexpression,includingreducedorlossofARID1Aexpression,wasobservedin109cases(22.3%)andwassignificantlycorrelatedwithlymphaticinvasion(80.7%vs69.5%,P=0.022)andlymphnodemetastasis(83.5%vs73.7%,P=0.042).ThetumorswithabnormalARID1AexpressionmorefrequentlyindicatedMMRdeficiency(47.4%vs20.2%,P<0.001).AmultivariateanalysisidentifiedabnormalARID1Aexpressionasanindependentpoorprognosticfactor(HR=1.36,95%CI:1.01-1.84;P=0.040).CONCLUSION:OurobservationssuggestthattheAIRD1Ainactivationisassociatedwithlymphaticinvasion,lymphnodemetastasis,poorprognosis,andMMRdeficiencyingastricadenocarcinomas.