简介:目的:探讨细胞周期素D1G870A基因多态性与头颈部肿瘤易感性的关系。方法:通过计算机检索和手工检索,收集有关细胞周期素D1G870A基因多态性与头颈部肿瘤易感性关系的文献,筛选出符合条件的文献,应用Meta分析软件对各项研究进行异质性检验,计算合并OR值及其95%可信区间,并行敏感性分析和发表偏倚的评估。结果:13篇文献纳入本研究,共计有2496例头颈部肿瘤患者和2463例对照人群。Meta分析合并结果显示与细胞周期素D1G870A基因AA基因型比较,携带GG基因型和携带GG或GA基因型个体头颈部肿瘤发生风险的OR值分别为0.88和0.89(OR=0.88,95%CI:0.59-1.32;OR=0.89,95%CI:0.67-1.19)。通过种族的分层分析,没有发现细胞周期素D1G870A基因多态性与头颈部肿瘤易感性在亚洲人群和欧洲人群中有差异。结论:细胞周期素D1G870A基因多态性可能与头颈部肿瘤易感性间不存在明显相关性,但纳入研究的数量及每个研究的样本量均较少,需加大样本量进一步研究。
简介:结肠癌转移相关基因1(metastasis.associatedincoloncancer-1,MACC1)是通过对结肠癌的研究新发现并证实的基因,近年来对MACC1与多种恶性肿瘤的相关研究逐渐受到关注,并取得一定成果,本文就此进行综述。
简介:Objective:Thisstudyaimstoinvestigatetheclinicopathologicsignificanceoflymphaticvesselinvasion(LVI)labeledbyD2-40monoclonalantibodyinesophagealsquamouscellcarcinoma(ESCC).Methods:ImmunohistochemicalassaywasusedtodetecttheexpressionofD2-40andLVIin107ESCCpatients.Then,thecorrelationbetweentheclinicopathologicfeatureandtheoverallsurvivaltimeofthepatientswasanalyzed.Results:Thelymphnodemetastasisrateswere70%and21%intheLVI-positiveandLVI-negativegroups,respectively.ThenodalmetastasisratewashigherintheLVI-positivegroupthanintheLVI-negativegroup.MultivariateregressionanalysisshowedthatLVIwasrelatedtonodalmetastasis(P<0.001).Themediansurvivaltimeofthepatientswas26and43monthsintheLVI-positiveandLVI-negativegroups,respectively.Althoughunivariateregressionanalysisshowedsignificantdifferencebetweenthetwogroups(P=0.014),multivariateregressionanalysisrevealedthatLVIwasnotanindependentprognosticfactorforoverallsurvivalintheESCCpatients(P=0.062).Lymphaticnodemetastasis(P=0.031),clinicalstage(P=0.019),andresidualtumor(P=0.026)weretheindependentprognosticfactors.Conclusion:LVIlabeledbyD2-40monoclonalantibodyisariskfactorpredictiveoflymphnodemetastasisinESCCpatients.
简介:Chronicalcoholconsumptionisamajorriskfactorworldwideaffectingsignificantlybothmortalityandyearsoflifelost(YLL)(1).Ca.5%ofthewesternworldshowriskyalcoholconsumptionandinsomecountriessuchasChinaaregionalyearlyincreaseofalcoholconsumptionofover400%hasbeenobservedrecently(2,3).Theliveris
简介:目的:构建并制备能够有效表达EB病毒BHRF1基因的重组慢病毒载体,观察BHRF1表达对人胚肺成纤维细胞(KMB17)凋亡的影响。方法:采用RT-PCR法,从B95-8细胞扩增EBVBHRF1基因,克隆至pWPIGW慢病毒载体上,与pVSVG及pSPAX质粒共转染人胚肾293T细胞,包装出重组慢病毒。将纯化后的重组慢病毒直接感染293T和KMB17细胞,荧光显微镜、实时定量RT-PCR、免疫印迹等方法检测BHRF1在细胞中的表达水平。流式细胞仪检测BHRF1表达对凋亡诱导剂或无血清培养诱发KMB17细胞凋亡的影响。结果:重组慢病毒介导BHRF1在293T和KMB17细胞内获得表达,能有效地抑制KMB17细胞的凋亡。结论:成功构建了表达BHRF1基因的重组慢病毒载体。
简介:目的探讨PHLPP1蛋白在癌旁正常胃黏膜、胃癌原发灶和淋巴结转移灶中的表达差异,分析PHLPP1蛋白表达与患者临床病理特征及预后的关系。方法应用免疫组化方法检测30例癌旁正常胃黏膜、157例胃癌原发灶和96例淋巴结转移灶中PHLPP1的蛋白表达情况,分析PHLPP1蛋白表达与胃癌临床病理特征的关系及其对患者生存预后的影响。结果患者癌旁正常胃黏膜、胃癌原发灶和淋巴结转移灶中的PHLPP1蛋白阳性表达率分别为:96.7%、61.8%和36.5%,组间差异有统计学意义(P<0.05)。PHLPP1蛋白表达与肿瘤分化程度、T分期、N分期及TNM分期显著相关,与患者年龄、性别、肿瘤大小、术前CEA水平无关。PHLPP1蛋白阳性表达患者总体5年总体生存率为68%,显著高于阴性表达患者34%(P=0.001)。Cox多因素回归分析结果表明T分期、N分期、PHLPP1蛋白低表达是胃癌的独立预后因素(P=0.027)。结论胃癌组织中PHLPP1蛋白缺失表达可能对胃癌发生、发展起促进作用。PHLPP1蛋白阴性表达可作为胃癌患者预后不佳的指标。
简介:PURPOSE:Todeterminethesafetyandefficacyofgefitinib,anepidermalgrowthfactorreceptor(EGFR)tyrosinekinaseinhibitor,incombinationwithradiationfornewlydiagnosedglioblastoma(GBM)patients.METHODSANDMATERIALS:BetweenMarch21,2002,andMay3,2004,RadiationTherapyOncologyGroup(RTOG)0211enrolled31and147GBMpatientsinthephase1and2arms,respectively.Treatmentconsistedofdailyoralgefinitnibstartedatthetimeofconventionalcranialradiationtherapy(RT)andcontinuedpostRTfor18monthsoruntilprogression.Tissuemicroarraysfrom68caseswereanalyzedforEGFRexpression.RESULTS:Themaximumtolerateddose(MTD)ofgefitinibwasdeterminedtobe500mginpatientsonnon-enzyme-inducinganticonvulsantdrugs(non-EIAEDs).Allpatientsinthephase2componentweretreatedatagefitinibdoseof500mg;patientsreceivingEIADSscouldbeescalatedto750mg.Themostcommonsideeffectsofgefitinibincombinationwithradiationweredermatologicandgastrointestinal.Mediansurvivalwas11.5monthsforpatientstreatedperprotocol.Therewasnooverallsurvivalbenefitforpatientstreatedwithgefitinib+RTwhencomparedwithahistoricalcohortofpatientstreatedwithRTalone,matchedbyRTOGrecursivepartitioninganalysis(RPA)classdistribution.Youngeragewassignificantlyassociatedwithbetteroutcome.Perprotocolstratification,EGFRexpressionwasnotfoundtobeofprognosticvalueforgefitinib+RT-treatedpatients.CONCLUSIONS:TheadditionofgefitinibtoRTiswelltolerated.MediansurvivalofRTOG0211patientstreatedwithRTwithconcurrentandadjuvantgefitinibwassimilartothatinahistoricalcontrolcohorttreatedwithradiationalone.