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：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：探讨RNAi抑制E6基因的表达对宫颈癌细胞基因表达谱的影响。方法：利用脂质体将已验证有效的表达针对E6基因小发卡RNA（shRNA）的重组质粒转染到宫颈癌细胞CaSKi中,提取宫颈癌细胞总RNA并利用AgilentHuman1A寡核苷酸表达芯片检测RNAi后CaSKi细胞基因表达谱的变化,最后实时PCR检测CDKN2B（p15）和MKI67来验证芯片分析结果。结果：与CaSKi/PSN相比,共有2765个基因表达有明显差异,其中有2709个上调基因（包括代谢相关基因、肿瘤抑制基因、信号转导相关基因、凋亡基因等）和56个下调基因（包括原癌基因、DNA结合和转录基因、代谢相关基因、信号转导相关基因、细胞周期和发育相关基因等）。实时PCR结果表明CDKN2B（p15）和MKI67的变化与基因芯片分析结果一致。结论：联合应用RNAi和基因芯片分析技术可以为研究HPV16E6与宿主细胞相互作用分子机制提够更丰富的资料和信息,并提供新的研究策略和途径。

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：背景与目的：5．氨基乙酰丙酸（5-ALA）荧光引导手术切除神经胶质瘤的基础研究一直较为薄弱，本文旨在探讨5-AM诱导C6胶质瘤内生性卟啉荧光随时间的动力学变化及卟啉在C6胶质瘤和正常鼠脑中的分布。方法：将C6细胞与5-ALA共培养后，使用流式细胞仪检测细胞内原卟啉Ⅸ（ProtoporphyrinⅨ，PpⅨ）含量。经股静脉向C6／Wistar大鼠脑胶质瘤模型体内注入5-ALA后，使用荧光显微镜和激光扫描共聚焦显微镜观察C6胶质瘤和正常鼠脑组织中卟啉荧光的分布。用鼠的冻伤皮质切片分析血脑屏障的破坏在卟啉产生中的影响。结果：体外C6细胞在加入5-ALA后1h检测到卟啉生成，主要集中在5～15h，11h达到高峰。C6胶质瘤切片荧光主要集中在注入5-ALA后2～10h，6h表现出最强荧光。肿瘤整体荧光呈斑片状分布，边界欠清楚。给药后对侧脑组织未检测到低水平荧光。给药后5h在皮质冻伤切片中检测到微量荧光。无瘤鼠脑组织在注入5-ALA后没有检测到荧光。结论：5-AM能诱导卟啉在C6细胞中积聚，其荧光表现是一个动态过程。5-ALA介导胶质瘤内生性卟啉蓄积与血脑屏障具有密切关系。肿瘤与正常脑组织具有不同荧光表现强度。可以为临床选择性应用5-ALA荧光引导胶质瘤切除术提供有益的指导作用。

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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：Objective:Toexploretheprobabilityofvascularendothelialgrowthfactor(VEGF)antisenseoligodeoxynucleotidesasadevelopingnewtherapeuticstrategyforglioma.Methods:VEGFproteinexpressionwasdetectedbyS-Pimmunohistochemicaltechnique.TumorcellapoptosiswasobservedbyTUNELmethod.Results:Comparedwithcontrol,VEGFproteinexpressionwasinhibitedbyantisenseoligodeoxynucleotidesinvitro.Andtheinhibitoryeffectsincreasedwiththeincreasingconcentration.VEGFpositiveratewas82.10%incontrolgroup,whilein2.5,5,10(mol/LAODNgroups,theywere70.00%,57.85%,53.20%respectively.Noinhibitioneffectwasfoundinthecelllinestreatedwithmissenseandsenseoligodeoxynucleotides.Invivo,antisenseoligodeoxy-nucleotidestherapyalsoinhibitedVEGFproteinexpressionandinducedtheincreaseofapoptotictumorcells.However,ithasnoeffectontumorcellproliferation.Conclusion:ItishopefulthatVEGFantisenseoligodeoxynucleotidesmaybeanewgenetherapymethodtogliomathroughitsantiangiogenesiseffectbyinhibitionofVEGF.

简介：研究人员最新在报告近68000人参加的大剂量维生素E对预防心血管病和癌症的危险的结果.人们可能听说过,维生素E是纯天然的抗氧化剂,服用维生素E是预防癌症和心脏病的有效方法.人们对它寄予很大希望,但研究证明这是个不切实际的希望.

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简介：Objective:Tostudytheroleofconnexingene(Cx43)onthedevelopmentofgliomaandthefeasibilityofusingCx43cDNAasatargetofgenetherapyofgliomas.Methods:ParentalratC6cellsandC6cellstransfectedwithCx43cDNAwereimplantedintorightcaudatenucleusofSDratsascontrolandtransfectedgroup.RatsbearingcerebralC6gliomasweretreatedwithCx43cDNAandemptyvectorastreatedgroupandemptyvectorgroup.Thegeneralmanifestation,survivaltime,MRIdynamicscanningandhistopathologicalchangesofallratswereobserved.Insituhybridizationandimmunohisto-chemistrywereusedforexaminationofCx43mRNAanditsproteiningliomas.AveragenumberofAgNORstainingwasusedfordetectionofcellproliferationactivity,andTUNELmethodfordeterminationofcellapoptosis.Results:Allratsincontrolandemptyvectorgroupdiedofcerebralgliomaswithin3weeksafterimplantationofC6cells.Sixoutofnineratsinthetransfectedgroupandeightoutoftenratsintreatedgroupkeptalivebeyond120dayswithtotallydisappearingofthetumorfoci,exceptonetreatedrathavingalittleresidueoftumor.IngliomasoftransfectedandtreatedgroupsCx43geneexpressionwasupregulated,proliferationactivitywaslowered,However,theapoptoticcellsdidnotincrease.Conclusion:ThepresentstudyindicatesthatCx43geneisofcrucialimportanceinthedevelopmentofmalignantglioma.Itcanbeaneffectivetargetforgenetherapyofgliomas.

简介：目的探讨小肠肿瘤误诊误治原因及防范措施。方法对2004年2月至2008年2月收治的6例小肠肿瘤患者的诊疗过程进行回顾性总结。结果6例小肠肿瘤均行手术治疗。其中5例（4例小肠腺瘤，1例小肠平滑肌瘤）良性肿瘤预后良好；1例原发性小肠淋巴瘤于术后2年肿瘤复发并转移，死于全身衰竭。结论重视小肠肿瘤的发生，选择有效的检查手段，可提高小肠肿瘤的术前诊断，降低其误诊误治的发生率。

简介：Objective:Toinvestigatetheimmunotherapyefficacyoffusioncells(dendritic-C6anti-TGF-β1cells)inthetreatmentofintracranialgliomas.Methods:Dendriticcellswereisolatedfromratbone-marrowprecursorsstimulatedinvitrowithgranulocyte-macrophagecolony-stimulatingfactor(GM-CSF)andInterleukin-4(IL-4).C6anti-TGF-β1cellsoriginallyfromC6celllineofaratglioblastomaweretransfectedwithplasmidofTGF-β1anti-sensegene.FusionsofdendriticcellsandC6anti-TGF-β1cellswerepreparedbypolyethyleneglycol(PEG).TheDC/C6anti-TGF-β1fusioncellswereobservedandconfirmedbylightmicroscopyandscanningelectronmicroscopy.Experimentalratsweredividedintothreegroupsatrandom:C6cells(I),dendritic-C6anti-TGF-β1fusioncellsandC6cells(II)andIMDMmediumonly(III).Thecellswereinjectedintorightparietalloberegionoftheratwithstereotaxictechnique.Histology,tumornecrosisandsurvivaltimewereevaluated.Results:ComparedwiththeratsthatreceivedC6cells(survivalmediantimewaslessthan20days,tumorregionwasseeninallfieldsofobserved),theratsinjectedwithdendritic-C6anti-TGF-β1fusioncellsandC6cellsgotamoreprolongedlifespan(morethan59days),aswellaslesstumorregion(5.01%-6.2%).Therewasnotumornecrosis,butsomegliaswereseeninsurroundings.Allratsweresurvivedandnonecrosiswasobservedinnegativecontrolgroup.StatisticalanalysisshowedthatgroupIIhadsignificantdifferencecomparedwithgroupI.Conclusions:Dendritic-C6anti-TGF-β1fusioncellscouldprolongthelifespanofrats,providingastrategytoachieveanantitumorresponseagainsttumorsinthecentralnervoussystem.

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：Chronicalcoholconsumptionisamajorriskfactorworldwideaffectingsignificantlybothmortalityandyearsoflifelost(YLL)(1).Ca.5%ofthewesternworldshowriskyalcoholconsumptionandinsomecountriessuchasChinaaregionalyearlyincreaseofalcoholconsumptionofover400%hasbeenobservedrecently(2,3).Theliveris

简介：ＰＲＯＭＯＴＩＯＮＯＦＩＮＶＩＴＲＯＧＲＯＷＴＨＯＦＨＵＭＡＮＭＥＤＵＬＬＯＢＬＡＳＴＯＭＡＣＥＬＬＳＢＹＥＸＯＧＥＮＥＯＵＳＩＬ－６ＬｉｕＪｉａｉ刘佳；ＬｉＨｏｎｇ李宏；ＨａｍｏｕＭａｒｉｅ－Ｆｒａｎｃｅ；ＮｉｃｏｌａｓｄｅＴｒｉｂｏｌｅｔ（１Ｄｉ...

简介：目的探索新城疫病毒HN基因核酸疫苗对Wistar大鼠C6胶质瘤生长抑制作用。方法构建荷C6胶质瘤Wistar大鼠的肿瘤模型，随机分组给予不同的处理给药，观察治疗期间及治疗后的肿瘤生长情况，通过病理组织学、超微结构分析及大鼠血清唾液酸含量的测定，检测新城疫病毒HN基因核酸疫苗在Wistar大鼠体内的抗肿瘤作用。结果pVHN组肿瘤生长速度明显受到抑制，其抑瘤率达78．35％，。病理组织学及超微结构观察到肿瘤细胞典型的凋亡特征。大鼠血清唾液酸含量测定结果显示，pVHN组动物血清唾液酸含量明显低于荷瘤对照组，与荷瘤对照组比较差异极显著(P<0．01)，证明HN基因对于去除血清唾液酸具有明显的作用。结论新城疫病毒HN基因核酸疫苗对Wistar大鼠C6胶质瘤生长有抑制作用，可显著降低大鼠血清内唾液酸的含量。

简介：E—选择素(又称内皮细胞白细胞粘附分子—1),主要由激活的血管内皮细胞表达并释放入血。它不但在白细胞定居及炎症反应中起主要作用,而且在循环中的肿瘤细胞定向到达靶器官的血管内皮细胞及其与内皮细胞的粘附启动,决定器官的特异性转移方面起非常重要的作用。为探讨肺癌时E—选择素表达及其与肺癌浸润转移的关系,本文对肺癌患者血浆中可溶性E—选择素水平进行测定。现报告如下: