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:目的探讨胃肠道恶性肿瘤患者肿瘤复发相关因子前列腺素E2(PGE2)、白细胞介素-2(IL-2)的水平及其与性别、肿瘤大小、围手术期输血量及输血类型的关系。方法回顾性分析246例胃肠道恶性肿瘤患者的病历资料。所有患者均行胃肠道肿瘤根治术,且术前经胃肠镜病理检查确诊。分别在术前1天、术后3天抽取外周血检测PGE2、IL-2水平,并分析不同性别、肿瘤大小、围手术期输血量、输血类型患者的PGE2、IL-2水平。结果术前1天、术后3天,不同性别、肿瘤大小、围手术期输血量、输血类型的胃肠道恶性肿瘤患者的PGE2、IL-2水平比较,差异均无统计学意义(P﹥0.05)。结论不同性别、肿瘤大小、围手术期输血量、输血类型的胃肠道恶性肿瘤患者短期内肿瘤复发相关因子PGE2、IL-2水平变化不大。
简介:Activationofthephosphoinositide3kinase(PI3K)/Akt/mammaliantargetofrapamycin(mTOR)pathwayiscommoninbreastcancer.Thereispreclinicaldatatosupportinhibitionofthepathway,andphaseⅠtoⅢtrialsinvolvinginhibitorsofthepathwayhavebeenorarebeingconductedinsolidtumorsandbreastcancer.Everolimus,anmTORinhibitor,iscurrentlyapprovedforthetreatmentofhormonereceptor(HR)-positive,humanepidermalgrowthfactorreceptor2(HER2)-negativebreastcancer.Inthisreview,wesummarisetheefficacyandtoxicityfindingsfromtherandomisedclinicaltrials,withsimplifiedguidelinesonthemanagementofpotentialadverseeffects.Educationofhealthcareprofessionalsandpatientsiscriticalforsafetyandcompliance.WhilethereissomeclinicalevidenceofactivityofmTORinhibitioninHR-positiveandHER2-positivebreastcancers,thebenefitsmaybemorepronouncedinselectedsubsetsratherthanintheoverallpopulation.FurtherdevelopmentofpredictivebiomarkerswillbeusefulintheselectionofpatientswhowillbenefitfrominhibitionofthePI3K/Akt/mTOR(PAM)pathway.
简介:Objective:ToexaminetheeffectofpSer9-GSK-3βonbreastcancerandtodeterminewhethertheunderlyingmetabolicandimmunologicalmechanismisassociatedwithROS/eIF2Bandnaturalkiller(NK)cells.Methods:WeemployedTWS119toinactivateGSK-3βbyphosphorylatingSer9andexploreditseffectonbreastcancerandNKcells.TheexpressionofGSK-3β,naturalkillergroup2memberD(NKG2D)ligands,eIF2BwasquantifiedbyPCRandWesternblot.Wemeasuredintracellularreactiveoxygenspecies(ROS)andmitochondrialROSusingDCFH-DAandMitoSOXTMprobe,respectively,andconductedquantitativeanalysisofcellularrespirationon4T1cellswithmitochondrialrespiratorychaincomplexⅠ/Ⅲkits.Results:OurinvestigationrevealedthatTWS119downregulatedNKG2Dligands(H60aandRae1),suppressedthecytotoxicityofNKcells,andpromotedthemigrationof4T1murinebreastcancercells.Nevertheless,LY290042,whichattenuatesp-GSK-3βformationbyinhibitingthePI3K/Aktpathway,reversedtheseeffects.WealsofoundthathigherexpressionofpSer9-GSK-3βinducedhigherlevelsofROS,andobservedthatabnormalityofmitochondrialrespiratorychaincomplexⅠ/ⅢfunctioninducedthedysfunctionofGSK-3β-inducedelectrontransportchain,naturallydisturbingtheROSlevel.Inaddition,theexpressionofNOX3andNOX4wassignificantlyup-regulated,whichaffectedthegenerationofROSandassociatedwiththemetastasisofbreastcancer.Furthermore,wefoundthattheexpressionofpSer535-eIF2BpromotedtheexpressionofNKG2Dligands(Mult-1andRae1)followingbyexpressionofpSer9-GSK-3βandgenerationofROS.Conclusions:ThePI3K/Akt/GSK-3β/ROS/eIF2BpathwaycouldregulateNKcellactivityandsensitivityoftumorcellstoNKcells,whichresultedinbreastcancergrowthandlungmetastasis.Thus,GSK-3βisapromisingtargetofanti-tumortherapy.
简介:目的探讨靶向P2X7受体(P2X7R)的小发夹RNA(shRNA)对人鼻咽癌HONE1细胞增殖、凋亡及信号通路的影响。方法根据预实验结果优化shRNA转染条件,将2条靶向抑制P2X7R基因的shRNA载体片段(shRNA-1、shRNA-2)分别高效转染HONE1细胞,同时设转染无义序列(Blank)的空转染组及不进行任何处理的对照组。分别于转染24、48、72、96h后采用实时荧光定量PCR(QPCR)检测P2X7R表达水平以筛选抑制率高的转染载体用于后续试验。四甲基偶氮唑盐(MTT)法检测各组转染24、48、72、96h后的增殖抑制率,流式细胞术检测各组转染48、96h后的细胞凋亡率,QPCR法检测各组凋亡相关基因的mRNA水平,Westernblotting检测各组转染96h后磷脂酰肌醇3-激酶/蛋白激酶B(PI3K/Akt)通路和Wnt/β-连接素(β-catenin)通路中的蛋白变化。结果转染组的P2X7RmRNA水平均低于空转染组和对照组(P〈0.05),且选择干扰效率高的shRNA-1载体进行功能学研究;与空转染组和对照组比较,shRNA-1转染组的HONE1细胞增殖抑制率、凋亡率及促凋亡基因Bid、Bax的mRNA水平均升高,而抗凋亡基因Bcl-2、Mcl-1的mRNA水平均降低,差异有统计学意义(P〈0.05);与对照组比较,shRNA-1转染组处理后PI3K/Akt通路中PTEN蛋白水平均升高,而p-Akt水平均降低(P〈0.05),Wnt/β-catenin通路中p-β-catenin、CyclinD1和C-myc水平均降低(P〈0.05)。结论通过shRNA抑制P2X7R基因表达可抑制鼻咽癌细胞增殖并诱导凋亡,可能与抑制PI3K/Akt、Wnt/β-catenin通路有关,对鼻咽癌的防治有一定价值。
简介:目的探讨ⅡA型磷脂酶A2(PLA2GⅡA)mRNA的表达水平与结、直肠癌的关系,为评估PLA2GⅡA对结、直肠癌的临床诊断、病程监测和预后预测的价值和意义提供实验依据。方法应用RT-PCR方法检测33例结、直肠癌患者的结、直肠癌配对组织(癌组织、癌旁组织和肿瘤远端切缘组织)中PLA2GⅡAmRNA的表达水平。用SPSS13.0统计学软件分析3组组织中的PLA2GⅡAmRNA水平的差异及结、直肠癌组织中PLA2GⅡAmRNA表达水平与临床病理因素的相关性。结果①PLA2GⅡAmRNA在结、直肠癌组织的表达水平明显高于癌旁及远端切缘组织,其表达阳性率分别为癌组织组90.91%,癌旁组66.67%,肿瘤远端切缘组51.52%(P〈0.05)。②女性组、早期组和无转移组患者结、直肠癌组织的PLA2GⅡAmRNA表达水平比男性组、晚期组和有转移组高(P〈0.05)。结论PLA2GⅡA基因可能参与了结、直肠肿瘤的发生和发展过程。
简介:Objective:Avarietyofionchannelshavebeenimplicatedinbreastcancerproliferationandmetastasis.VoltagegatedK+(Kv)channelsnotonlycauserepolarizationinexcitablecells,butarealsoinvolvedinmultiplecellularfunctionsinnon-excitablecells.InthisstudyweinvestigatedtheroleofKvchannelsinmigrationofBT474breastcancercells.Methods:Transwelltechniquewasusedtoseparatemigratorycellsfromnon-migratoryonesandthesetwogroupsofcellsweresubjecttoelectrophysiologicalexaminationsandmicrofluorimetricmeasurementsforcytosolicCa2+.CellmigrationwasexaminedintheabsenceorpresenceofKvchannelblockers.Results:Whencomparedwithnon-migratorycells,migratorycellshadmuchhigherKvcurrentdensities,butratherunexpectedly,moredepolarizedmembranepotentialandreducedCa2+influx.Reversetranscriptasepolymerasechainreaction(RT-PCR)analysisrevealedthepresenceofKv1.1,Kv1.3,Kv1.5,Kv2.1,Kv3.3,Kv3.4andKv4.3channels.Cellmigrationwasmarkedlyinhibitedbytetraethylammonium(TEA),adelayedrectifierKvchannelblocker,butnotby4-aminopyridine,anA-typeKvchannelblocker.Conclusions:Takentogether,ourresultsshowthatincreasedKvchannelexpressionplayedaroleinBT474cellmigration,andKvchannelscouldbeconsideredasbiomarkersorpotentialtherapeutictargetsforbreastcancermetastasis.Themechanism(s)bywhichKvchannelsenhancedmigrationappearedunrelatedtomembranehyperpolarizationandCa2+influx.
简介:Objective:Tounderstandwhetherverapamil(VER)resistancedevelopmentinthemultidrug-resistantcelllineanditsmechanism.Methods:K562/ADM/VERcellsublineresistanttoverapamilwasestablishedthroughagradualincreaseofVERconcentrationinthemedia.MTTmethodwasusedtoassayresistancetoVER,crossresistancetodipyriamole(DPM),cyclosporinA(CsA)inthecells,andHPLCandspectrofluorometertodetectintracellularaccumulationofVERorADMrespectively,aswellasS-Pimmunocytochemicaltechniquefordetectionofgenesexpression.Results:Itwereobservedthat7.9-foldincreaseinVERresistance,significantlyreducedintracellularaccumulationofVERorADMandalsodevelopacrossresistancetoDPMandCsAinK562/ADM/VERcells,comparedwithitsparentcell,K562/ADM.High-levelofp-glycoprotein(pgp),middle-levelofp53,p16,waspresentintwocelllineswithoutexpressionofGSTPI,C-myc,C-myc,C-fosandC-erbB-2.Bc1-2proteinexpressionwasfoundonlyinK562/ADMcells.Conclusion:K562/ADMcellswerecapableofbeinginducedtodevelopresistancetoVER.
简介:目的评价髓核摘除联合K-Rod动态固定治疗腰椎间盘突出症的临床疗效及影像学变化。方法2009年1月至2011年11月,对39例单节段或双节段腰椎间盘突出症患者分别采用髓核摘除联合K-Rod动态固定(A组,19例)和经椎间孔椎体间融合(transforaminallumbarinterbodyfusion,TLIF)(B组,20例)治疗。两组患者一般资料比较差异无统计学意义(P>0.05),有可比性。手术前后采用疼痛视觉模拟评分(visualanaloguescale,VAS)及Oswestry功能障碍指数(oswestrydisabilityindex,ODI)进行比较评价,并动态观察术后责任椎间隙高度及腰椎活动度变化情况。结果A组随访时间18~32个月,平均22个月;B组随访时间18~37个月,平均23个月。末次随访两组患者腰腿痛症状明显改善。A组末次随访时VAS为1.16±0.50,ODI为(3.72±3.63)%,较术前VAS5.52±1.58及ODI(50.83±20.28)%有明显降低(P<0.001);B组末次随访时VAS为2.13±0.69,ODI为(18.61±4.07)%,较术前VAS6.50±1.21及ODI(60.56±9.92)%有明显降低(P<0.001)。A组术后手术节段ROM减小,但末次随访时已恢复至术前近60%,B组术后手术节段将为0°。两组相邻节段及腰椎总活动度维持在术前水平。A组末次随访时手术节段椎间隙高度较术前降低约10%,但术后维持在一个较稳定的水平。两组相邻椎间隙高度无明显差异。两组均未见内固定松动、物断裂等情况。结论与融合相比,K-Rod系统保留了腰椎生理曲度和固定节段的活动度,对相邻节段退变无明显影响,短期临床疗效满意,长期疗效有待进一步观察。
简介:脑胶质瘤是最常见的颅内原发性肿瘤,因多数呈浸润性生长,治疗效果不佳,寻找有效的治疗手段势在必行。目前研究表明,胶质瘤的恶性进展涉及信号转导通路的异常,这为开辟新的治疗手段提供了新思路。现已初步证实,磷酸磷脂酰肌醇-3-羟基激酶信号转导通路异常与胶质瘤的发生、发展关系最为密切,故本文着重对该通路的相关内容作简要介绍。
简介:目的将在对待matrine的K562房间上调查CGI-100-击倒的K562房间的特征和CGI-100RNA干扰(RNAi)的效果。指向CGI-100基因和与一个不同序列包含一样的核苷酸作文的一双否定控制的三oligonucleotides被设计并且化学上综合了的方法。由在K562房间的shRNA-CGI-100的CGI-100表示的抑制效率用semiquantitativeRT-PCR和点污点杂交被决定。K562房间的生长上的CGI-100RNAi的效果用MTT试金被检验,房间区别被不同途径包括流动cytometry,benzidine染色和电子显微镜测量。在CGI-100-konckdownK562细胞为48h与matrine的0.2mg/ml或hemin的30mol/L被孵化以后,GlycophorinA(GPA)(CD235a)和生长因素independence-1BmRNA(Gfi-1BmRNA)的表示层次被RT-PCR和GPA的蛋白质层次测量,CD14和CD15被流动cytometry检测。结果CGI-100RNAi的真核细胞的表示向量成功地被构造。K562/shRNA-CGI-100房间线在由shRNA-CGI-100的CGI-100基因表示的抑制效率在哪个是54%被建立。CGI-100-knockdown禁止了增长并且在K562房间导致了erythroid区别。与控制K562房间相比,K562/shRNA-CGI-100房间证明减少的吸收度价值由MTT试金,减少的enchromation,增加的heterochromation,G0/G1阶段房间的增加的百分比,S阶段房间的减少的人口,减少的PI(房间的增长索引),和benzidine积极的房间的提高的百分比检测了。而且,到matrine或hemin的K562/shRNA-CGI-100房间的敏感被提高,到matrine的这些房间的敏感对hemin比那高。与控制K562房间相比,在K562/shRNA-CGI-100房间的matrine处理导致了增长,benzidine积极的房间的提高的百分比,GPA和Gfi-1B的显然起来调整的mRNA表达式,和GPA的增加的吝啬的荧光紧张(MFI)的增加的禁止的率。没有CD14表示被检测,没有统计意义被作出对有利的裁决检测CD15。最后,在与hemin对待并�
简介:目的探讨老年患者幽门螺杆菌(HP)感染与胃癌及癌前病变中C-myc、p16、p53、K-ras和C.erbB-2基因表达及其临床意义。方法分析老年患者的胃镜检查活检标本116例,HE染色观察胃黏膜的炎症和异型增生变化,特染法检测胃黏膜的肠上皮化生,应用Warthin-stary银染色法检测HP,应用ELISA法检测血清学HPIgG,14C尿素呼气试验(14C-UBT)检测HP,应用免疫组化sP法检测C-myc、p16、p53、K-ras和C-erbB-2基因的表达。结果老年患者在不同胃组织中C-myc、p16、p53基因的表达均有显著差异,而K-ras和C-erbB-2基因表达未见显著性差异。HP感染率以胃癌为最高,其次为胃溃疡。结论本实验通过老年患者的HP检测和观察胃黏膜的炎症和异型增生变化,再结合癌基因和抑癌基因的表达异常,提示萎缩性胃炎异型增生、肠上皮化生和胃癌的HP感染率均高于非萎缩性胃炎。再次表明胃癌与HP感染有一定相关性。
简介:Objective:ToinvestigatetheeffectsofCAL-101,particularlywhencombinedwithbortezomib(BTZ)onmantlecelllymphoma(MCL)cells,andtoexploreitsrelativemechanisms.Methods:MTTassaywasappliedtodetecttheinhibitoryeffectsofdifferentconcentrationsofCAL-101.MCLcellsweredividedintofourgroups:controlgroup,CAL-101group,BTZgroup,andCAL-101/BTZgroup.TheexpressionofPI3K-p110σ,AKT,ERK,p-AKTandp-ERKweredetectedbyWesternblot.TheapoptosisratesofCAL-101group,BTZgroup,andcombinationgroupweredetectedbyflowcytometry.Thelocationchangesofnuclearfactorkappa-B(NF-κB)of4groupswasinvestigatedbyNF-κBKitexploring.Westernblotwasappliedtodetectthelevelsofcaspase-3andthephosphorylationofAKTindifferentgroups.Results:CAL-101dose-andtime-dependentlyinducedreductioninMCLcellviability.CAL-101combinedwithBTZenhancedthereductionincellviabilityandapoptosis.WesternblotanalysisshowedthatCAL-101significantlyblockedthePI3K/AKTandERKsignalingpathwayinMCLcells.ThecombinationtherapycontributedtotheinactivationofNF-κBandAKTinMCLcelllines.However,cleavedcaspase-3wasup-regulatedaftercombinedtreatment.Conclusion:OurstudyshowedthatPI3K/p110σisanoveltherapeutictargetinMCL,andtheunderlyingmechanismcouldbetheblockingofthePI3K/AKTandERKsignalingpathways.ThesefindingsprovidedabasisforclinicalevaluationofCAL-101andarationaleforitsapplicationincombinationtherapy,particularlywithBTZ.
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:PI3K/Akt信号通路是许多细胞外因子的下游信号传导通路,在细胞生长、增殖、分化和凋亡中起到重要作用,该通路异常广泛存在于许多恶性肿瘤中,与肿瘤发生、发展密切相关。在子宫内膜癌发生发展中,PI3K/Akt信号传导通路异常起到重要的作用,通过对该通路的进一步研究,可能为子宫内膜癌的发生机制、诊断以及为临床靶向治疗提供新的思路。
简介:目的优化建立一种敏感、简便、稳定地检测结肠癌患者K-Ras基因突变的方法。方法构建K-Ras基因第二外显子12、13密码子的野生型及突变型质粒,通过优化PCR及肽核酸与特异性引物的浓度关系,达到有效模板浓度低的样品K-Ras基因突变的检测。结果成功构建K-Ras基因第二外显子12、13密码子的野生型和突变型质粒。肽核酸钳制PCR条件优化包括:(1)最佳复性温度为58℃和60℃;(2)有效模板浓度为10^-6pg/μl;(3)引物浓度与肽核酸浓度的最佳比例为20∶1。在K-Ras突变型质粒与野生型质粒浓度比为1∶100时即可检测到突变。结论肽核酸钳制PCR技术较传统的测序方法更为敏感,可以应用于有效模板浓度低的样品,为结肠癌个体化治疗前相关基因检测的有效方法。