简介：目的：探讨血管生成抑制剂NM-3联合卡铂对裸鼠皮下种植胃癌细胞生长的影响及可能机制。方法：40只皮下种植人胃腺癌SGC-7901裸小鼠分成生理盐水对照组（2ml/kg）、卡铂治疗组（5mg/kg）、NM-3治疗组（20mg/kg）及联合治疗组（NM-320mg/kg和卡铂5mg/kg）,腹腔注射,每周2次。6周后处死动物,取完整肿瘤组织,测量肿瘤体积,计算抑瘤率;常规染色检测胃癌细胞凋亡指数（AI）以及免疫组化染色记数微血管密度（MVD）。结果：（1）生理盐水组、卡铂组、NM-3组及联合组肿瘤体积（mm^3）分别为1609.55±41.32、1375.17±38.75、871.26±38.84和548.32±66.02,NM-3组及联合组肿瘤体积均显著小于生理盐水组、卡铂组（P〈0.05）,且联合组肿瘤体积显著小于NM-3组（P〈0.05）;卡铂组、NM-3组及联合组抑瘤率分别为14.56%、45.87%、65.93%,联合治疗对裸鼠皮下胃癌生长的抑制作用明显优于各单药治疗。（2）生理盐水组、卡铂组、NM-3组和联合组的MVD计数分别为7.30±0.53、6.98±0.45、4.72±0.51和4.80±0.39,NM-3组及联合组的MVD较卡铂组和生理盐水组明显减少（P〈0.05）,而卡铂组和生理盐水组之间、NM-3组和联合组之间MVD无差异（P〉0.05）。（3）生理盐水组、卡铂组、NM-3组和联合组的胃癌细胞凋亡指数（AI）分别为（2.12±0.29）%、（2.47±0.31）%、（10.43±3.15）%和（12.63±3.75）%,NM-3组及联合组AI均显著高于生理盐水对照组及卡铂组（P〈0.05）,而生理盐水组和卡铂组、NM-3组以及联合组之间无差异（P〉0.05）。结论：血管生成抑制剂NM-3能减少胃癌微血管生成,诱导胃癌细胞凋亡,抑制肿瘤生长,并且能够增强传统细胞毒药物卡铂抗胃癌作用。

简介：雷文东，张汝刚，阎水忠，王秀琴，牟巨伟，张大为，吴Ｎｍ２３ＧＥＮＥＥＸＰＲＥＳＳＩＯＮＡＮＤＩＴＳＣＯＲＲＥＬＡＴＩＯＮＷＩＴＨＬＹＭＰＨＮＯＤＥＭＥＴＡＳＴＡＳＩＳＩＮＨＵＭＡＮＬＵＮＧＣＡＮＣＥＲ￥ＬｅｉＷｅｎｄｏｎｇ；ＺｈａｎｇＲｏｕｇｉｎｇ；...

简介：nm23-H1作为肿瘤转移抑制基因，在多种实体肿瘤中能抑制肿瘤细胞的转移和植入，与预后呈正相关，但在造血系统肿瘤研究中却发现，nm23-H1是一种分化抑制因子，具有抑制造血细胞的分化成熟，参与白血病和淋巴瘤的发生、发展过程，与预后呈负相关。

简介：Objective:Chroniclymphocyticleukemia(CLL)andmantlecelllymphoma(MCL)cellsover-expressaguanineexchangefactor(GEF),Rasgrf-1.ThisGEFincreasesactiveRasasitcatalyzestheremovalofGDPfromRassothatGTPcanbindandactivateRas.ThisstudyaimstostudythemechanismofactionofRasgrf-1inB-cellmalignancies.Methods:N-terminustruncatedRasgrf-1variantshaveahigherGEFactivityascomparedtothefull-lengthtranscriptthereforeaMCLcelllinewithstableover-expressionoftruncatedRasgrf-1wasestablished.TheB-cellreceptor(BCR)andchemokinesignalingpathwayswerecomparedintheRasgrf-1over-expressingandacontroltransfectedcellline.Results:Cellsover-expressingtruncatedformofRasgrf-1haveahigherproliferativerateascomparedtocontroltransfectedcells.BCRwasactivatedbylowerconcentrationsofanti-IgMantibodyinRasgrf-1over-expressingcellsascomparedtocontrolcellsindicatingthatthesecellsaremoresensitivetoBCRsignaling.BCRsignalingalsophosphorylatesRasgrf-1thatfurtherincreasesitsGEFfunctionandamplifiesBCRsignaling.ThisactivationofRasgrf-1inover-expressingcellsresultedinahigherexpressionofphospho-ERK,AKT,BTKandPKC-alphaascomparedtocontrolcells.BesidesBCR,Rasgrf-1over-expressingcellswerealsomoresensitivetomicroenvironmentstimuliasdeterminedbyresistancetoapoptosis,chemotaxisandERKpathwayactivation.Conclusions:ThisGEFproteinsensitizesB-cellstoBCRandchemokinemediatedsignalingandalsoupregulatesanumberofothersignalingpathwayswhichpromotesgrowthandsurvivalofthesecells.

简介：目的：探讨nm23-H1基因表达与口腔癌颈淋巴结转移的关系。方法：应用免疫组化ABC法，观察52例病理确诊的口腔鳞状细胞癌石蜡标本中nm23-H1基因产物的表达。结果：55．8％(29／52)呈nm23-H1阳性表达，阳性产物主要位于细胞浆内。nm23-H1基因表达与肿瘤病理分级、临床分期均无关(P>0．05)，但与颈淋巴结转移显著相关，在不伴淋巴结转移的nm23-H1阳性率为66．7％(22／33)，明显高于伴有淋巴结转移组的36．8％(7／19)，(P<0．05)。结论：nm23-H1基因在抑制口腔癌淋巴结转移过程中起重要作用，其表达水平可能是预测口腔癌淋巴结转移趋势和预后及指导临床治疗有意义的一项生物学指标。

简介：目的探讨肿瘤转移抑制基因nm23-H1和基质金属蛋白酶MMP-2在正常贲门黏膜与贲门癌组织中的表达及临床意义.方法采用免疫组化SP法检测57例贲门癌组织及25例正常贲门黏膜组织中nm23-H1和MMP-2的表达.结果贲门癌组nm23-H1与MMP-2的阳性表达率分别为24.6%（14/57）和73.7%（42/57）,均明显区别于正常贲门黏膜组织的92.0%（23/25）和20.0%（5/25）（P均〈0.05）;nm23-H1的阳性表达与肿瘤浸润深度及淋巴结转移呈显著相关（P均〈0.05）,而与患者年龄、性别、分化程度无显著相关性（P均〉0.05）.MMP-2的阳性表达与肿瘤浸润深度、淋巴结转移及组织学分级相关（P均〈0.05）,与年龄、性别无关（P均〉0.05）.结论nm23-H1低表达和MMP-2高表达与贲门癌的临床病理特点和转移、预后密切相关,可作为判定贲门癌生物学行为的重要指标.

简介：ThechronicinfectionofhepatitisBvirus(HBV)iscloselyrelatedtotheoccurrenceanddevelopmentofhepatocellularcarcinoma(HCC).AccumulatedevidencehasshownthatHBVXprotein(HBxprotein)isamultifunctionalregulatorwithacrucialroleinhepatocarcinogenesis.However,informationonthemechanismbywhichHBVinducesHCCislacking.ThisreviewfocusesonthepathologicalfunctionsofHBxinHBV-inducedhepatocarcinogenesis.Asatransactivator,HBxcanmodulatenuclearfactorkappa-light-chain-enhancerofactivatedBcells(NF-κB)andtranscriptionfactorAP-2.Moreover,HBxcanaffectregulatorynon-codingRNAs(ncRNAs)includingmicroRNAsandlongncRNAs(lncRNAs),suchasmiRNA-205andhighlyupregulatedinlivercancer(HULC),respectively.HBxisalsoinvolvedinepigeneticmodification,includingmethylationandacetylation.HBxinteractswithvarioussignal-transductionpathways,suchasproteinkinaseB/Akt,Wnt/β-catenin,signaltransducerandactivatoroftranscription,andNF-κBpathways.Moreover,HBxaffectscellularfatebyshiftingthebalancetowardcellsurvival.HBxmayleadtothelossofapoptoticfunctionsordirectlycontributestooncogenesisbyachievingtransformingfunctions,whichinducehepatocarcinogenesis.Additionally,HBxcanmodulateapoptosisandimmuneresponsebydirectorindirectinteractionwithhostfactors.WeconcludethatHBxhastensthedevelopmentofhepatoma.

简介：目的探讨Ⅰ期非小细胞肺癌（nonsmallcelllungcancer,NSCLC）病灶中nm23的表达及淋巴结微转移情况,以便为临床诊治提供参考。方法选取2005年1月至2010年12月期间深圳市光明新区人民医院接诊的经根治性切除治疗的Ⅰ期NSCLC患者30例进行研究,检测原发癌灶石蜡标本中的nm23基因表达水平,并对常规病理检查为阴性的淋巴结以CK为标志物实施微转移检测。两种测定方式均采用免疫组化法,分析测定结果。结果30例患者nm23阳性表达率为56.67%,阴性表达率为43.33%;常规病理检出阴性淋巴结132枚中有7例（20枚）检出淋巴结微转移,阳性率分别为23.33%、15.15%;nm23阳性组淋巴结微转移率明显低于阴性组（P〈0.05）。结论Ⅰ期NSCLC病灶中nm23表达与淋巴结微转移有相关性,联合检测对病理分期、预后评估等意义重大。

简介：目的探讨乳腺癌组织中Ki67、VEGF与nm23的表达及其与临床病理因素的相关性,并明确其临床意义.方法利用组织芯片技术与免疫组化方法检测120例乳腺癌及癌旁正常乳腺组织中Ki67、VEGF、nm23的表达,并结合临床病理等因素进行相关性分析.结果Ki67、VEGF在乳腺癌组织中的表达均显著高于癌旁正常乳腺组织（P〈0.05）,而nm23在乳腺癌组织中的表达低于癌旁正常乳腺组织（P〈0.05）;Ki67的表达与乳腺癌临床分期有关（P〈0.05）,而与患者年龄、肿瘤大小、淋巴结转移状况无显著相关性（P＞0.05）;Ki67与VEGF的表达具有协同性,两者的共同表达与乳腺癌临床分期有关（P〈0.05）.结论Ki67、VEGF、nm23表达与乳腺癌的发生、发展密切相关,其中Ki67的阳性表达可以作为评价乳腺癌发展的一个重要生物学指标,联合检测VEGF、nm23对于指导乳腺癌临床分期与治疗具有重要意义.

简介：根据世界癌症研究基金会（WCRF）资助的一项最新研究显示，人体血液中维生素B含量较高将有可能降低发生肺癌的风险，这个结果对吸烟、非吸烟以及曾经吸烟的人群是相同的。这项发现将有助于科学家了解肺癌发病的机理，并将对预防其发生提供线索。

简介：

简介：DuckhepatitisBvims(DHBV)DNAwasdetectedindifferenttumorousnodulesofduckswithhepaticmulticentriccancerorintrahepaticmetastasisbySouthernblottechnique.Among7duckswithhepatocellularcarcinomaofmultipletumornodules,thehybridizationpatternofIntegratedDHBVDNAIndifferenttumorousnoduleswasidenticalin3casesanddifferentin2cases.OnecaseshowedasimilarhybridizationpatternintwotumorousnodulesandotheronewasnegativetorDHBVDNA.IntegratedDHBVDNAwasalsoidentifiedinametastaticlungcancerofduckswithhepatocellularcarcinoma.Thehybridizationpatternofmetastasisoflungswasasthesomeasthatinprimaryhepatocellularcarcinoma.ThesamediscretehybridizationbandsInthedifferenttumorousnodulesindicatethatthesenodulesmightarisefromonetransformedcell.ThedifferenthybridizationpatternsInvarioustumorousnodulesshowthatthesetumorousnodulesmightarisefromvarioustransformedcells.Theresultssuggestthatthehyb

简介：Objective:ToassesstheeffectofantiviraltherapyforhepatitisBvirus(HBV)-relatedhepatocellularcarcinoma(HCC)afterradicalhepatectomy.Methods:Atotalof478HBV-relatedHCCpatientstreatedbyradicalhepatectomywereretrospectivelycollected.Patientsinthetreatmentgroup(n=141)receivedpostoperativelamivudinetreatment(100mg/d),whereaspatientsinthecontrolgroup(n=337)didnot.Recurrence-freesurvival(RFS)rates,overallsurvival(OS)rates,treatmentsforrecurrentHCCandcauseofdeathwerecomparedbetweenthetwogroups.Propensityscorematching(PSM)analysiswasalsoconductedtoreduceconfoundingbiasbetweenthetwogroups.Results:The1-,3-,and5-yearRFSratesdidn’tsignificantlydifferbetweenthetwogroups(P=0.778);however,the1-,3-,and5-yearOSratesinthetreatmentgroupweresignificantlyhigherthanthoseinthecontrolgroup(P=0.002).Similarresultswereobservedinthematcheddata.SubgroupanalysisshowedthatantiviraltreatmentconferredasignificantsurvivalbenefitforBarcelonaClinicalLiverCancerstageA/Bpatients.FollowingHCCrecurrence,morepeopleinthetreatmentgroupwereabletochoosecurativetreatmentsthanthoseinthecontrolgroup(P=0.031).Forcauseofdeath,fewerpeopleinthetreatmentgroupdiedofliverfailurethanthoseinthecontrolgroup(P=0.041).Conclusion:PostoperativeantiviraltherapyincreaseschancesofreceivingcurativetreatmentsforrecurrentHCCandpreventsdeathbecauseofliverfailure,therebysignificantlyprolongingOS,especiallyinearly-orintermedian-stagetumors.

简介：许多人类疾病的发生和发展可归因于一些基因的异常表达，从而导致疾病的发生。其中一部分基因是在核因子kappaB（nuclearfactor-kappaB，NF—κB）调控下进行的。NF—κ是广泛存在于哺乳动物中的转录因子，是由Sen等于1986年首先在B细胞中发现的一种核蛋白。因它能与B细胞免疫球蛋白上的K轻链基因增强子κB序列（GGGACTITCC）特异结合而得名。实际上它能与多种细胞基因的启动子和增强子序列位点发生特异性结合，并促进转录和表达，参与众多与免疫和炎症反应有关的基因转录的调控。它的异常激活或完全抑制与多种疾病的发生有关。在控制细胞增殖、凋亡、肿瘤的发生、发展和耐药问题上均起着重要的作用。因此深入探讨NF—κB在体内病理状态下的活化机制以及其与细胞、基因之间的调节作用具有重要的意义。现就NF—κB的组成、结构、激活途径以及与肿瘤的关系作一综述。

简介：Objective:Cancercellradioresistanceisastumblingblockinradiationtherapy.TheactivityinthenuclearfactorkappaB(NFκB)pathwaycorrelateswithanti-apoptoticmechanismsandincreasedradioresistance.TheIKKcomplexplaysamajorroleinNFκBactivationuponnumeroussignals.Inthisstudy,weexaminedtheinteractionbetweenionizingradiation(IR)anddifferentmembersoftheIKK-NFκBpathway,aswellasupstreamactivators,RAF1,ERK,andAKT1.Methods:Theeffectof4GyofIRontheexpressionoftheRAF1-ERK-IKK-NFκBpathwaywasexaminedinA549andH1299lungcancercelllinesusingWesternblotanalysisandconfocalmicroscopy.WeexaminedchangesinradiationsensitivityusinggenesilencingorpharmacologicalinhibitorsofERKandIKKβ.Results:IKKα,IKKγ,andIκBαincreaseduponexposuretoIR,therebyaffectingnuclearlevelsofNFκB(phospho-p65).ERKinhibitionorsiRNA-mediateddown-regulationofRAF1suppressedthepost-irradiationsurvivaloftheexaminedlungcancercelllines.AsimilareffectwasdetectedonsurvivaluponsilencingIKKα/IKKγorinhibitingIKKβ.Conclusions:ExposureoflungcancercellstoIRresultsinNFκBactivationviaIKK.ThegeneticorpharmacologicalblockageoftheRAF1-ERK-IKK-NFκBpathwaysensitizescellstotherapeuticdosesofradiation.Therefore,theIKKpathwayisapromisingtargetfortherapeuticinterventionincombinationwithradiotherapy.

简介：Objective:TodeterminewhetherInterferon-alpha-2b(IFN-α2b)canmodulatetheautophagicresponseinhepatocellularcarcinomacells.Methods:HepatocellularcarcinomacellsweretreatedwithIFN-α2b.Autophagywasassessedbyacridineorangestaining,GFP-LC3dottedassay,transmissionelectronmicroscopyandimmunoblotting.Results:AcridineorangestainingshowedthatIFN-α2btriggeredtheaccumulationofacidicvesicularandautolysosomesinHepG2cells.TheacridineorangeHepG2cellratioswere(4.3±1.0)%,(6.9±1.4)%,and(13.1±2.3)%,respectively,aftertreatmentwith100,1,000,and10,000IU/mLIFN-α2bfor48h.AmarkedlypunctatepatternwasobservedinHepG2cellstreatedwith10,000IU/mLIFN-α2bfor48h,butonlydiffuseandweaklyfluorescentGFP-LC3punctawasobservedincontrolcells.HepG2cellstreatedwith10,000IU/mLIFN-α2bfor48hdevelopedautophagosome-likecharacteristics,includingsingle-ordouble-membranevacuolescontainingintactanddegradedcellulardebris.TheBeclin1andLC3-IIproteinexpressionwasup-regulatedbyIFN-α2btreatment.Conclusion:Autophagycanbeinducedinadose-dependentmannerbytreatmentwithIFN-α2binHepG2cells,andtheBeclin1signalingpathwaywasstimulatedbyIFN-α2b.

简介：Objective:Toinvestigatephospho-(-cateninexpressioninnon-smallcelllungcancer(NSCLC)andtostudytherelationshipbetweenphospho-(-cateninexpressionandsomeclinicalpathologicalfactors.Methods:Theexpressionofphospho-(-cateninin67primaryNSCLCcasesdetectedimmunohistochemically.Results:phospho-(-cateninwasnotexpressedinnormalbronchialmucouscellandshowedcytoplasmicandnuclearexpressioninNSCLCcell.Totalpositiveexpressionratereached62.7%,andpositiveexpressionrateofnucleuswas38.8%.Thepositiveexpressionrate(87.5%)andnuclearexpressionrateofadenocarcinoma(62.5%)wereapparentlyhigherthanthoseofsquamouscellcancer(40.0%and17.1%)(P<0.01).Expressionofphospho-(-cateninhadnorelationshiptodifferentiationdegreeandlymphaticmetastasis.Thepostoperativesurvivaltimeisnotrelatedtophospho-(-cateninexpression.(Log-ranktest,P=0.9198;P=0.6274).COXmodelanalysisshowedthattumorstageanddifferentiationareindependentriskfactorstoprognosis(P=0.001;P=0.020).Conclusion:NSCLCcellsshowpositiveexpressionofphospho-(-catenin,phospho-(-cateninnuclearexpressionisrelevanttohistologicaltypes.Thereisnodifferenceinpostoperativesurvivaltimebetweenpatientswithphospho-(-cateninpositiveexpressionandpatientswithnegativeexpression,expressionofphospho-(-cateninisnotindependentriskfactortoprognosis.

简介：Objective:Toassesstheclinicalfeatures,survivalandprognosticfactorsofprimarytesticulardiffuselargeB-celllymphoma(DLBCL).Methods:Aretrospectivestudyof37patientswithprimarytesticularDLBCLwascarriedoutfromNovember2003toMay2012.Theirclinicalfeatures,survivalandprognosticfactorswereanalyzed.Results:Duringamedianfollow-upperiodof39.8months(5.4-93.0months),themedianprogression-freesurvival(PFS)was26.2months(95%CI:0-65months)andthe3-yearoverallsurvival(OS)ratewas78.4%.Withinthewholecohort,thefactorssignificantlyassociatedwithasuperiorPFSwerelimitedstage(stageI/II),lactatedehydrogenase(LDH)≤245U/L,internationalprognosticindex(IPI)≤1,primarytumordiameter<7.5cm,andpatientswhohadcompleteresponse(CR)andreceiveddoxorubicin-containedchemotherapy(P<0.05).Therewasatrendtowardsuperioroutcomeforpatientswhoreceivedcombinedtherapy(surgery/chemotherapy/radiotherapy)(P=0.055).PatientswhohadCR,primarytumordiameter<7.5cmandIPIscore≤1weresignificantlyassociatedwithlongerPFSatmultivariateanalysis.Conclusions:PrimarytesticularDLBCLhadpoorersurvival.CR,primarytumordiameterandIPIwereindependentprognosticfactors.Thecombinedtherapyoforchectomy,doxorubicin-containedchemotherapyandcontralateraltesticularradiotherapy(RT)seemedtoimprovesurvival.

简介：目的探讨局部晚期乳腺癌患者新辅助化疗前后p53、Ki-67、NM23、表皮生长因子受体(EGFR)的表达变化及临床意义。方法收集112例Ⅱ~Ⅲ期乳腺癌患者的临床资料,所有患者均接受氟尿嘧啶+表柔比星+环磷酰胺序贯多西他赛(FEC-T)或多西他赛+表柔比星+环磷酰胺(TEC)化疗,化疗前后行空心针活检穿刺获得病理标本,采用免疫组织化学法检测p53、Ki-67、NM23、EGFR的表达情况,比较化疗前后上述蛋白的阳性表达情况及其与化疗疗效的关系。采用Logistic回归模型分析乳腺癌患者化疗疗效的影响因素。分析化疗前p53、Ki-67、NM23、EGFR阳性表达情况与患者3年生存率的关系。结果化疗后乳腺癌患者的p53、Ki-67、EGFR阳性表达率均低于化疗前,NM23阳性表达率高于化疗前,差异均有统计学意义(P﹤0.05)。化疗后有效患者75例,化疗前p53、Ki-67、EGFR阴性患者的有效率高于p53、Ki-67、EGFR阳性患者,而NM23阴性患者的有效率低于NM23阳性患者,差异均有统计学意义(P﹤0.05)。Logistic多因素分析结果显示,组织学分级为Ⅲ级及p53、Ki-67、EGFR阳性表达是影响患者化疗疗效的危险因素,NM23阳性表达是影响患者化疗疗效的保护因素(P﹤0.05)。化疗前p53、Ki-67、EGFR阳性患者的3年生存率均低于p53、Ki-67、EGFR阴性患者,NM23阳性患者的3年生存率高于NM23阴性患者,差异均有统计学意义(P﹤0.05)。结论局部晚期乳腺癌患者新辅助化疗前后p53、Ki-67、NM23、EGFR的阳性表达率均有变化,且化疗前上述指标的表达情况与化疗后疗效及远期预后有关。

简介：目的：研究miR-940对胃癌细胞增殖的影响,探讨miR-940和Cbl-b信号转导通路在此过程中的作用。方法：采用Real-timePCR法检测胃癌细胞中miR-940的表达,MTT法检测胃癌细胞的增殖能力,双荧光素酶报告基因检测系统检测miR-940与Cbl-b的结合,Westernblotting实验观察蛋白的表达。结果：MTT法显示miR-940可促进胃癌细胞MGC803的增殖,BLAST对比分析结果显示Cbl-b与miR-940存在结合位点。双荧光素酶报告基因检测系统证实Cbl-b是miR-940的靶基因。Westernblotting结果显示过表达miR-940后,Cbl-b的表达明显下调。Cbl-b抑制胃癌细胞MGC803的增殖。miR-940通过负向调节Cbl-b的表达促进胃癌细胞的增殖。结论：miR-940通过抑制Cbl-b的表达,促进胃癌细胞MGC803的增殖。