简介:Objective:TostudythedifferencesandsimilaritiesoftheantisensedrugswithdifferentstructuresonthebiologicalfunctionsofK562cells.Methods:Cytotoxiceffectsweremeasuredbyuseofacellviabilityassay.FlowcytometricanalysisandagarosegelelectrophoresisofDNAfragmentationwerealsoperformed.Theexpressionlevelofproteinwasassayedbyimmunofluorescenceusingfluoresceisothiocyanatelabel.Results:PNAtargetingthecodingregionoftheBcl-2messengerRNAcouldeffectivelyinhibitK562cellviability,down-regulatethesynthesisoftheBcl-2proteinandincreasecellapoptosis.By72haftertheBcl-2antisensePNAtreatment,K562cellsshowedmorereductioninthelevelofBcl-2proteincomparedwithcellstreatedwiththeantisenseODN.Aftertreatmentwith10μmol/LofBcl-2antisensePNAorantisenseODNfor72h,apoptoticratesofK562cellswere13.15±1.13and11.72±1.12,respectively.Furthermore,therewassignificantdifferenceinthepercentageofapoptoticcellsbetweenantisensePNAgroupandantisenseODNgroup.Conclusion:TheresultssuggestthatantisensePNAtargetingthecodingregionofBcl-2mRNAhasbetterantisenseeffectsthantheantisenseoligonucleotidesoninducingapoptosisofK562cells.
简介:目的比较线粒体融合蛋白-2(Mfn2)在乳腺癌、甲状腺癌和大肠癌组织及相应正常组织中的表达差异,探讨Mfn2与肿瘤发生的关系.方法选取经病理检查确诊的乳腺癌、甲状腺癌和大肠癌标本各20例,另取相应癌旁正常组织作为对照,采用免疫组织化学染色SABC法对Mfn2在不同组织中的表达水平进行测定和对比分析.结果免疫组化染色显示,在乳腺癌、甲状腺癌、大肠癌组织中表达水平均明显低于相应正常组织(P〈0.01).结论Mfn2在乳腺癌、甲状腺癌和大肠癌组织中表达低于正常组织,Mfn2与这3种恶性肿瘤的发生、发展密切相关,可作为预测三种恶性肿瘤转移及其预后的参考指标.
简介:Minimalresidualdisease(MRD)playsacausativeroleintumorrecurrenceandestablishmentofeffectiveandsensitiveassessmentofMRDcouldbeveryusefulforstagingandevaluationoftreatmentofdisease.Inthisstudy,weassessedtheusefulnessofhcf-2/JHPCRanalysisonoccultlymphoma...
简介:目的分析绝经前雌激素受体(ER)阳性、人类表皮生长因子受体2(HER2)阴性乳腺癌患者复发转移特征。方法回顾性分析154例ER阳性HER2阴性绝经前复发转移性乳腺癌患者的临床资料,对患者临床及复发转移特征进行总结分析。结果154例绝经前ER阳性HER2阴性乳腺癌患者,中位发病年龄45岁(26~53岁),中位无病生存时间(DFS)52.4个月(6.1~329.1个月),复发转移多发生在术后2~5年(49.4%,76/154);非内脏转移较内脏转移多发(55.8%vs44.2%);骨转移最多(52.6%,81/154),内脏转移以肺多见(26.6%,41/154);多因素分析显示,淋巴结转移状态是DFS的主要影响因素(P﹤0.05)。结论绝经前ER阳性HER2阴性乳腺癌患者复发转移多发生在术后2~5年,主要为非内脏转移,骨转移最多;淋巴结转移状态是影响DFS的重要因素。
简介:背景与目的:ABCG2是ATP转运蛋白(ATPbindingcassette,ABC)家族中G2成员,具有编码乳腺癌耐药蛋白(breastcancerresistanceprotein,BCRP)功能,在肿瘤研究中又可作为SP细胞标志蛋白来筛选肿瘤干细胞,本研究旨在逆转其耐药作用。方法:尼卡地平(NCDP)、尼莫司汀(AGNU)分别和联合作用于人脑多形性胶质母细胞瘤(GBM)体外细胞系和裸小鼠脑移植瘤。体外实验:用MTr比色法检测药物作用后GBM细胞存活率,流式细胞仪检测细胞凋亡率;体内实验:观察荷瘤裸小鼠的生存期及移植瘤病理。结果:体外实验中,AC-NU+NCDP组对肿瘤抑制和促进凋亡作用都显著高于ACNU组(P〈0.01)。体内实验中,ACNU+NCDP组的生存期比ACNU组明显延长(P〈O.01)。结论:随着胶质瘤恶性程度增高而表达率增加的ABCG2耐药基因功能因被NCDP抑制后增强了ACNU对胶质瘤细胞的杀伤、促进凋亡和延长荷瘤鼠生存期的作用。
简介:Objective:Toinvestigatetheimpactofbeta-elemeneinjectiononthegrowthandalpha-tubuleofhumanhepatocarcinomaHepG2cells.Methods:CellproliferationwasassessedbyMTTassay.Cellcycledistributionwasdetectedbyflowcytometry(FCM).ThemRNAexpressionofalpha-tubulinwasmeasuredbyRT-PCR.Westernblotanalysiswasusedtodetermineproteinexpressionofalpha-tubulinandthepolymerizationoftubulin.Results:Beta-elemeneinjectioninhibitedHepG2cellsproliferationinadose-andtime-dependentmanner;FCManalysisindicatedbeta-elemeneinjectioninducedcellcyclearrestedatSphase.RT-PCRandwesternblotanalysisshowedthatbeta-elemeneinjectiondown-regulatedalpha-tublinatbothmRNAandproteinlevels,presentingadose-dependentmanner.Moreover,beta-elemeneinjectionreducedthepolymerizationofmicrotubulesinadose-dependentmanner.Conclusions:Beta-elemeneinjectioncaninhibittheproliferationofhepatomaHepG2cellsandinducecellapoptosis,themechanismmightbepartlyrelatedtothedown-regulationofalpha-tubulinandinhibitionofmicrotubularpolymerization.
简介:Objective:Tostudytherelationshipbetweencyclooxygenase-2(COX-2)expressionandtumorangiogenesisinhumanbreastcancer.Methods:Archivalprimarybreastcarcinomas(n=62),adjacentductalcarcinomainsitu(DCIS,n=13)andDCISalone(n=5)wereanalyzedforCOX-2andVEGFexpressionbyimmunohistochemistryusingspecificmonoclonalantibodies.Microvesseldensity(MVD)wasalsoexaminedtheusingCD34staining.Results:AsignificantcorrelationwasfoundbetweenCOX-2andVEGFexpression(P<0.01).BothCOX-2andVEGFweresignificantlycorrelatedwithMVD(P<0.05)andP<0.01,respectively).COX-2andVEGFgeneswereoverexpressedintumorspecimensascomparedwithnormalepithelia.Conclusion:COX-2isrelatedtotumorangiogenesisinbreastcancer.ItislikelythatVEGFisoneofthemostimportantmediatorsoftheCOX-2angiogenicpathway.
简介:Objective:ToinvestigatewhethertheBc1-2antisenseoligonucleotide(ASODN)mayenhanceradiation-inducedapoptosisinRajicellline.Methods:Cellsurvivingfractionwasdeterminedusingthetrypanbluedyeexclusionassay.Theexpressionlevelofbc1-2proteinwasassayedbyimmunofluorescenceusingfluoresceisothiocyanatelabel.ApoptosiswasdetectedbyGiemsastainingandflowcytomertriccellcycleanalysis.Results:ItwasfoundthatBc1-2ASODNcombinedwithradiationhadsignificantlyreducedthenumberofviablecells(P<0.05).TherewasnodifferenceoncellsurvivalbetweenmismatchBc1-2oligodeoxynucleotide/radiationcombinationandradiation-treatedcellsalone.Bc1-2ASODNcombinedwithradiationcouldsignificantlyinhibitexpressionofBc1-2proteininRajicells(P<0.05).CellstreatedwithBc1-2ASODNcombinedwithradiationat72hdisplayedclassicapoptoticchanges.ApoptosisratesofRajicellstreatedwithBc1-2oligodeoxynucleotide/radiationcombinationandradiation-treatedcellsalone,respectively.Conclusion:Bc1-2antisenseoligonucleotidecanenhanceradiation-inducedapoptosisinRajicellline.
简介:Chronicalcoholconsumptionisamajorriskfactorworldwideaffectingsignificantlybothmortalityandyearsoflifelost(YLL)(1).Ca.5%ofthewesternworldshowriskyalcoholconsumptionandinsomecountriessuchasChinaaregionalyearlyincreaseofalcoholconsumptionofover400%hasbeenobservedrecently(2,3).Theliveris
简介:Objective:Toobservetheeffectofinhibitionoftelomeraseactivitybyseleniumdioxide(SeO2)onlungcarcinomacelllineGLC-82.Methods:TRAP-PCR-ELISAwasusedtostudythechangesoftelomeraseactivityinhumanpulmonaryadenocarcinomacelllineGLC-82treatedbySeO2atthedifferentconcentrations(3,10,30μmol/L)andfordifferenttimes(24,48,and72h).Results:SeO2inhibitedthetelomeraseactivityofGLC-82atthedifferentconcentrationsaftertreatmentof24,48and72h.Conclusion:SeO2inhibitsfromtelomeraseactivityofhumanlungcarcinomalineGLC-82.Theeffectofinhibitionisdose-dependantandtime-dependant.
简介:背景与目的:不典型的鞍区病变易于误诊,特别是鞍内动脉瘤,误诊后的处理往往十分被动。本文结合我们误诊的两例鞍内动脉瘤,探讨鞍内动脉瘤的临床表现、影像学特点及误诊后的处理措施。方法:分析我们误诊的两例鞍内动脉瘤的临床资料,并复习文献。结果:1例患者术前误诊为鞍区骨源性病变,1例误诊为垂体瘤,均存经蝶手术过程中发生汹涌出血,术后脑血管造影提示为颈内动脉海绵窦段动脉瘤。视力下降、视野缺损、垂体功能低下及高泌乳素血症是其主要临床表现。磁共振上的异常流空信号为其特征性的影像改变。结论:非典型的鞍内动脉瘤诊断困难;当磁共振为非典型的鞍区病变表现,且有垂体功能低下和(或)视力下降时,或磁共振显示有异常的流空信号,应常规行脑血管造影检查。
简介:目的探讨组织中缺氧诱导因子2仪(HIF-2α)的表达在鼻咽癌诊治中的临床价值。方法应用免疫组织化学方法检测51例初诊鼻咽癌组织和20例鼻咽炎性组织中HIF-2α的表达。结果鼻咽癌组织HIF-2α阳性表达率明显高于鼻咽慢性炎性组织(P〈0.01);Ⅰ和Ⅱ期鼻咽癌患者组织中HIF-2α的表达明显低于Ⅲ和Ⅳ期鼻咽癌患者(P=0.039);T1及T2患者鼻咽癌组织的HIF-2α表达阳性率明显低于T3及T4患者鼻咽癌组织的HIF-2α表达阳性率(P=0.026);有颈部淋巴结转移患者鼻咽癌组织的HIF-2α表达阳性率明显高于无颈淋巴结转移患者的HIF-2α表达阳性率(P=0.015)。结论HIF-2α的高表达在鼻咽癌的发生、发展过程中有重要作用,检测HIF-2α的表达对于鼻咽癌的诊断、分期具有一定的临床价值,但仍需积累更多的临床资料进行深入研究。