简介:Someantitumoractivitiesofcomponent(E),extractedfromtherootofFagopynumCymosum(Trev)Meisn(FCTM),haverecentlybeendiscoveredinvivoandinvitro.ThecomponentE(CE)’spatternofactionwithtumorcellularDNAatthemolecularpharmacologicallevelwasinvestigatedbymacromolecularsynthesisexperiment(MSE)andhumanDNAinteractionsystemestablishedinourlaboratory.Theexperimentsdemonstratedthat,invitro,theagentcouldmarkedlyinhibittheincorporationof3H-TdRintothecellularDNA,andtheIC50inP388leukemiacellandinSGC-7901cellwas17.86μg/mland110.4μg/ml,respectively.Theagent,atmg/mllevel,couldproduceanintercalationreversionpatternwithDNAwithinashorttime(2hours).Butwhentheintervalwasprolongedforover4hours,theactionchangedtointercalationirreversiblepattern.Accordingtotheseobservations,theauthorsinferthatCEinteractswithDNAintwoways-directlyandindirectly.Theindirectaction,especiallyinlowconcentr
简介:目的研究E-cad在食管鳞状细胞癌中的表达及意义。方法免疫组化SABC法检测76例食管癌E-cad的表达。结果正常食管粘膜细胞膜E-cad表达呈阳性。在癌组织中,E-cad细胞膜表达减弱。E-cad减弱表达率为65.8%(50/76),E-cad表达与病理分化程度(P=0.02)、漫润深度(P=0.024)、静脉侵犯(P=0.04)、淋巴结转移(P=0.022)和临床分期(P=0.04)具有相关性;而与年龄、性别、病理类型无关(P>0.05)。在无淋巴结转移组E-cad表达降低占56.25%(27/48),有淋巴结转移组占82.14%(23/28),两者之间表达差异有显著性;有静脉侵犯组E-cad表达降低率为92.86%(13/14)和无静脉侵犯组为59.68%(37/62),两者之间差异有显著性。结论E-cad减弱表达与食管癌生物学行为有关,可能为食管癌预后差的因素之一。
简介:Chronicalcoholconsumptionisamajorriskfactorworldwideaffectingsignificantlybothmortalityandyearsoflifelost(YLL)(1).Ca.5%ofthewesternworldshowriskyalcoholconsumptionandinsomecountriessuchasChinaaregionalyearlyincreaseofalcoholconsumptionofover400%hasbeenobservedrecently(2,3).Theliveris
简介:Objective:Tostudythevaccinepotencyofgene-modifiedtumorcells.Methods:TheEL-4lymphomawastransducedwithrecombinantretroviruscontainingthemurineGM-CSFgeneorB7-1gene.Theeffectofgenetransductiononantitumorimmunitywasinvestigated.Results:Flowcytometryanalysisshowedthatexpressionoftheirsurfacemarkerbetweenwild-typeEL-4cellsandgenetransducedtumorcellswasthesameexceptforCD80positiveinB7-1genetransducedcells.GM-CSFgeneorB7-1genetransducedEL-4cellsresultedinremarkablelossoftumorigenicityinsyngeneticmice.ThesystemicprotectiveimmunitywasinducedagainstthechallengewithEL-4/wtcells.TherapeuticvaccinewithEL-4/GM-CSForEL/7-1cellscouldretardthegrowthofestablishedearly-stageEL-4/wttumorsignificantly,butnotretardthegrowthoflate-stageEL-4/wttumor.IrradiatedGM-CSFgenetransducedEL-4cellsshowedstrongvaccineeffectagainstEL-4cellchallenge,butirradiatedB7-1genetransducedEL-4cellsshowedweakvaccineeffect.RemarkablecooperativeantitumoreffectagainstEL-4cellchallengewasobservedwhenbothirradiatedEL-4/GM-CSFandEL-4/B7-1wereinoculatedtogether.Conclusion:GM-CSFgeneorB7-1genetransducedcombinationofthetwokindsofvaccinemayhavepotentialapplicationvalueinhumancancertreatment.
简介:烟碱型乙酰胆碱受体(nAChR)是细胞膜上超家族配体门控离子通道受体,依赖尼古丁及其代谢产物的活性,激活各种代谢通路。这些代谢通路与肿瘤细胞的增殖、生存、迁移、侵袭、凋亡和血管生成有密切的联系,而CHRNA5-A3-B4是编码nAChRα5、α3和β4亚基的一组基因簇。研究证实,CHRNA5-A3-B4基因的多种单核苷酸多态性(SNP)与肿瘤的发生发展相关,这种突变的多样性,促进了更为主效的基因位点的探索,为肿瘤的靶向治疗提供依据。本文结合相关研究,从肺癌、食管癌及其他相关肿瘤疾病的发生来阐述CHRNA5-A3-B4相关SNP基因位点,以便获取主效基因位点。
简介:Objective:ToinvestigatetheexpressionofE2FandBcl-2andtheclinicopathologicalsignificanceinhepatocellularcarcinoma.Methods:TheexpressionsofE2F-3andBcl-2in74patientswithhepaticcarcinoma,paracarcinomaand15patientswithlivercirrhosisweredetectedbyS-Pimmunohistochemicalstaining.Results:TheexpressionofE2Finhepaticcarcinomawassignificantlyhigherthanthatinparacarcinomaorlivercirrhosis(P<0.005),theexpressionofBcl-2inhepaticcarcinomawassignificantlyhigherthanthatinparacarcinoma(P<0.005),inwhichBcl-2expressionwaslowerthaninlivercirrhosis(P<0.05).TheexpressionofE2F-3wasrelatedwithhistologicalgrade,tumorsize,andtheexpressionofBcl-2wasrelatedwithhistologicalgrade,tumorsizeandtumornumber.TherewascorrelationbetweentheexpressionofE2F-3andBcl-2inhepaticcarcinoma.Conclusion:E2F-3andBcl-2expressionmayplayanimportantroleindevelopment,progressionandcellapoptosisoftumor.
简介:目的:探讨SULT1E1及ERβ蛋白与子宫内膜腺癌的发生、发展之间的关系.方法:采用Westernblot方法检测正常增生期子宫内膜组织、不典型增生子宫内膜组织及子宫内膜腺癌组织中SULT1E1和ERβ蛋白的表达含量.结果:SULT1E1和ERβ蛋白在正常增生期子宫内膜组织、不典型增生子宫内膜组织及子宫内膜腺癌组织中的表达含量逐渐降低,三者比较差异有统计学意义(P<0.05).不典型增生子宫内膜组织及子宫内膜腺癌组织与正常增生期子宫内膜组织比较差异均有统计学意义(P<0.05).SULT1E1和ERβ蛋白与子宫内膜腺癌组织学分级、肌层浸润深度、手术病理分期及淋巴结转移等无关(P>0.05).在子宫内膜腺癌组织中,SULT1E1蛋白与ERβ蛋白表达呈明显正相关(r=0.66,P<0.01).在正常增生期和不典型增生子宫内膜组织中,SULT1E1蛋白与ERβ蛋白表达无明显相关性(r=0.035,P>0.05;r=0.466,P>0.05).结论:在子宫内膜腺癌的渐近演变过程中,SULT1E1、ERβ表达降低或缺失可能与子宫内膜癌的早期形成有一定的关系,ERβ蛋白含量越多,SULT1E1蛋白对雌激素的调节作用越强,但不能作为子宫内膜腺癌病情严重程度和预后进行评价的指标.
简介:目的:探讨E-钙粘蛋白(E-cadherin,E-cad)的表达与胃癌的浸润、转移及预后的关系.方法:应用SP免疫组化方法检测76例胃癌E-cad的表达.结果:正常胃粘膜上皮中E-cad全部表达.Ⅰ期E-cad的异常表达率为19.6%,而Ⅱ、Ⅲ、Ⅳ期的异常表达率分别是57.2%、62.1%和69.3%,Ⅰ期和Ⅱ、Ⅲ、Ⅳ期间有非常显著性差异(P<0.01).伴有淋巴结转移者51例中异常表达为74.3%,而无淋巴结转移者40.2%,两者间有非常显著性差异(P<0.05).在进展期胃癌中按肿瘤生长方式分组,结节型E-cad异常表达率41.2%,而溃疡浸润型异常表达率67.3%,两者间有显著性差异(P<0.05);高中分化胃癌E-cad异常表达率32.0%,而低分化胃癌E-cad异常表达率69.6%,两者间有非常显著性差异(P<0.01).癌细胞浸润深度达粘膜、粘膜下层和肌层者E-cad异常表达率为30.1%、38.2%,而浸润至浆膜及浆膜外者异常率为67.3%,两者间有非常显著性差异(P<0.01).胃癌组织中E-cad的表达与癌组织分化、浸润和转移密切相关.结论:E-cad与肿瘤的发生、浸润、转移有关,可作为一种新的肿瘤标记物,对判断预后有一定价值.
简介:Objective:BethesdaSystemforReportingThyroidCytopathology(BSRTC)categoriesⅠ,Ⅲ,andⅤaccountforasignificantproportionoffineneedleaspirationcytology(FNAC)diagnoses.ThisstudyaimedtocomparethediagnosticefficacyofBRAFV600EmutationandtheThyroidImagingReportingandDataSystem(TIRADS)classificationindifferentiatingpapillarythyroidcancers(PTCs)frombenignlesionsamongBSRTCI,III,andVnodules.Methods:Atotalof472patientswith479noduleswereenrolledinthisprospectivestudy.Ultrasound,BRAFV600Emutationtesting,andFNACwereperformedineachnodule,followedbysurgeryorregularultrasoundexamination.Results:IntheBSRTCIcategory,BRAFV600Eshowedsimilarsensitivity,higherspecificity,andloweraccuracywhencomparedwithTIRADS.IntheBSRTCIII/Vcategory,thesensitivity,specificity,andaccuracyofBRAFV600EweresimilartothoseofTIRADS.IncomparisontoBRAFV600Ealone,thecombinationofthetwomethodssignificantlyimprovedsensitivity(BSRTCⅠ:93.6%vs.67.7%,P<0.01;BSRTCⅢ:93.8%vs.75.0%,P<0.01;BSRTCV:96.0%vs.85.3%,P<0.001).WhencomparedwithTIRADSalone,thecombinationimprovedsensitivityinBSRTCⅠnodules(93.6%vs.74.2%,P<0.05),increasedsensitivityanddecreasedaccuracyinBSRTCIIInodules(93.8%vs.75.0%,P<0.01,91.0%vs.93.6%,P<0.01),andimprovedbothsensitivityandaccuracyinBSRTCVnodules(96.0%vs.82.0%,P<0.001;94.2%vs.81.3%,P<0.001).Conclusions:BRAFV600EexhibitedhigherspecificityandloweraccuracycomparedwithTIRADSinBSRTCⅠnodules,whilethetwomethodsshowedsimilardiagnosticvalueinBSRTCⅢ/Ⅴnodules.ThecombinationofthetwomethodsdistinctlyimprovedsensitivityinthediagnosisofPTCsinBSRTCⅠ,Ⅲ,andⅤnodules.
简介:目的:研究B7-H4在乳腺癌中的表达情况及其与各临床病理变量之间的相关性。方法:应用免疫组织化学染色分析51例乳腺癌手术患者切除的肿瘤标本的B7-H4的表达情况,分析其与年龄、肿瘤类型、大小、淋巴结转移、肿瘤分期、激素受体表达情况、Her-2/neu状态的相关性。结果:B7-H4可表达于乳腺癌细胞的胞膜上、胞浆内或同时表达于两者之内。88.2%(45/51)的标本B7-H4阳性,并且与肿瘤中Her-2/neu状态(P=0.04)、组织学类型(P=0.002)明显相关,Her-2/neu阳性患者中B7-H4的表达要明显高于阴性的患者,浸润性导管癌细胞中B7-H4的表达显著高于原位癌,而与其他临床病理参数无关。结论:B7-H4可能与肿瘤的预后和肿瘤的进展相关。
简介:Objective:ToinvestigatetheeffectsofE7080andN5-(1-iminoethyl)-L-ornithinedihydrochloride(L-NIO)oncolorectalcanceraloneandincombination.Methods:HT29colorectalcancercelllinefromSapInstitutewasused.Real-timecellanalysis(xCELLigencesystem)wasperformedtodeterminetheeffectsofE7080andL-NIOoncolorectalcellproliferation.WhileapoptosiswasdeterminedwithAnnexinVstaining,andtheeffectofagentsonangiogenesiswasdeterminedwithchorioallantoicmembrane(CAM)model.Results:WefoundthatE7080hasastrongantiproliferativeeffectwithanhalfmaximuminhibitionofconcentration(IC50)valueof5.60×10–8mol/L.AlsoithasbeenobservedthatE7080showedantiangiogenicandapoptoticeffectsonHT29colorectalcancercells.AntiangiogenicscoresofE7080were1.2,1.0and0.6for100,10and1nmol/LE7080concentrations,respectively.Furthermore,apoptosishasbeendetectedin71%ofHT29colorectalcancercellsafteradministrationof100nmol/LE7080whichmayindicatestrongapoptoticeffect.MeanwhileadministrationofL-NIOalonedidnotshowanyeffect,butthecombinationofE7080withL-NIOincreasedtheantiproliferative,antiangiogenicandapoptoticeffectsofE7080.Conclusions:ResultsofthisstudyindicatethatE7080maybeagoodchoiceintreatmentofcolorectaltumors.FurthermoretheincreasedeffectsofE7080whencombinedwithL-NIOraisethepossibilitytousealowerdoseofE7080andthereforeavoid/minimizethesideeffectsobservedwithE7080.
简介:目的:在既往的胃癌蛋白质组研究中我们已发现hnRNPA2/B1具有较高表达,本试验进一步探讨hnRNPA2/B1在胃癌中的表达情况及其与胃癌临床病理特征的关系。方法:用免疫组织化学方法检测122例胃癌患者的胃癌组织及癌旁正常胃粘膜中hnRNPA2/B1蛋白的表达。结果:hnRNPA2/B1在胃癌组织中核表达的阳性率为92.6%(113/122),其中伴有胞浆表达的阳性率为7.3%(9/122)。在癌旁非瘤组织中核表达阳性率为87.7%(107/122),未见胞浆表达。hnRNPA2/B1的表达状态与胃癌临床病理特征无关联。结论:在胃癌及癌旁非瘤组织中均可发现hnRNPA2/B1核表达,hnRNPA2/B1不能作为肿瘤相关的分子标志物。
简介:目的探讨化生性乳腺癌组织中Snail和上皮性钙黏附素(E-cad)的表达水平及其与临床病理特征的关系。方法采用免疫组化SP法检测58例化生性乳腺癌组织中Snail和E-cad的表达,并收集相应病例的临床病理资料,分析Snail、E-cad表达与化生性乳腺癌临床病理特征的关系及两蛋白的相关性,同时根据随访资料分析两者表达与复发转移的关系。结果在化生性乳腺癌中,Snail和E-cad的阳性表达率分别为77.6%(45/58)和48.3%(28/58)。Snail的表达与临床分期、淋巴结转移和ER表达有关(P〈0.05),而E-cad表达与组织学分级、淋巴结转移有关(P〈0.05),两者与年龄、HER-2表达、病理类型、肿瘤大小及月经状态均无关(P〉0.05)。Snail与E-cad的表达呈负相关(r=-0.308,P=0.019),且均与化生性乳腺癌复发转移有关(P〈0.05)。结论Snail和E-cad联合检测可判断化生性乳腺癌的恶性程度和侵袭能力,且与复发转移有关,两者有望作为化生性乳腺癌治疗的分子靶点。
简介:核内不均一核糖核蛋白A2/B1(hnRNPA2/B1)是核不均一核糖核蛋白家族的成员,其在细胞生命活动中起着非常重要的作用,主要参与pre-mRNA的可变剪接和转录调控、端粒维持及细胞增殖、迁移过程,在很多肿瘤中呈高表达的状态。本文就hnRNPA2/B1在肿瘤中的作用与机制及其所涉及的其他功能作一综述。
简介:目的研究HPV16E6蛋白及抑癌基因p53在口腔癌中的表达.方法回顾性分析100例口腔癌患者的临床资料和病理切片,采用免疫组织化学方法检测口腔癌组织中p53和HPV16E6蛋白的阳性表达情况,分析其与患者临床分期和病理分级的关系.结果男性口腔癌患者的p53阳性表达率低于女性患者,HPV16E6阳性表达率高于女性患者;年龄﹥50岁口腔癌患者的p53阳性表达率高于年龄≤50岁的患者,HPV16E6阳性表达率低于年龄≤50岁的患者,但差异均无统计学意义(P﹥0.05).口腔癌患者的组织切片显示,p53阳性表达细胞较少,而HPV16E6阳性表达细胞较多.随着患者临床分期的升高(Ⅰ~Ⅳ期),p53阳性表达率呈下降趋势,HPV16E6阳性表达率呈上升趋势,Ⅱ、Ⅲ、Ⅳ期患者与Ⅰ期患者的p53和HPV16E6阳性表达率比较,差异均有统计学意义(P﹤0.05);随着患者病理分级的升高(Ⅰ~Ⅲ级),p53阳性表达率呈下降趋势,HPV16E6阳性表达率呈上升趋势,Ⅱ、Ⅲ级患者与Ⅰ级患者的p53和HPV16E6阳性表达率比较,差异均有统计学意义(P﹤0.05).结论口腔癌患者的p53阳性表达率随患者病理分级与临床分期的升高而降低,HPV16E6阳性表达率随患者病理分级与临床分期的升高而升高,p53阳性表达率的降低和HPV16E6阳性表达率的升高可能与口腔癌的发生和发展有关.
简介:Objective:TostudythesynergiceffectsofIL-12andB7-1transfectantonantitumorimmunityinvivo.Methods:TheretrovirusvectorencodingmIL-12andmB7-1genewastranfectedintoEL-4thymiclymphomacellsrespectively.Thecellswereusedastumorvaccineandthetherapeuticeffectwasobserved.Results:IncontrasttothemiceimmunizedwithEL-4/WtorEL-4/Neogroups,thetumorigenicityofEL-4/IL-12transfectantwasdecreased(P<0.001).TheEL-4/IL-12andEL-4/B7-1cellsirradiatedwith60CoshowedsignificantsystematicprotectiveeffectsagainsttherechallengeofEL-4/Wt.60CoirradiatedEL-4/IL-12cellsdelayedtheoccurrenceoftumorandprolongedthesurvivalperiodoftumorbearingmice.CombinationofthevaccinesofEL-4/IL-12andEL-4/B7-1resultedintheenhancedtherapeuticeffectcomparedwitheachsingletransfectantgroup(P<0.001).Conclusion:TheresultsshowedthatIL-12transducedcellscouldenhancetheantitumorimmunityofhostascancervaccine.CombinationoftheEL-4/IL-12andEL-4/B7-1transfectantcouldimproveimmunityofhostandisaprospectcancervaccine.