简介:AIM:ToinvestigatetheeffectofhepatitisBvirus(HBV)XgeneonapoptosisandexpressionsofapoptosisfactorsinXgene-transfectedHepG2cells.METHODS:TheHBVXgeneeukaryonexpressionvectorpcDNVA3-XwastransientlytransfectedintoHepG2cellsbylipid-mediatransfection.UntransfectedHepG2andHepG2transfectedwithpcDNA3wereusedascontrols.ExpressionofHBxinHepG2wasidentifiedbyPT-PCR.MTTandTUNELwereemployedtomeasureproliferationandapoptosisofcellsin.threegroups.Semi-quantifiedRT-PCRwasusedtoevaluatetheexpressionlevelsofFas/FasL,Bax/Bcl-xL,andc-mycineachgroup.RESULTS:HBVXgenewastransfectedintoHepG2cellssuccessfully.RT-PCRshowedthatHBxwasonlyexpressedinHepG2/pcDNA3-Xcells,butnotexpressedinHepG2andHepG2/pcDNA3cells.AnalyzedbyMTT,cellproliferationcapacitywasobviouslylowerinHepG2/pcDNA3-Xcells(0.08910±0.003164)thaninHepG2(0.14410±0.004927)andHepG2/pcDNA3cells(0.12150±0.007159)(P<0.05andP<0.01).AnalyzedbyTUNEL,cellapoptosiswasmuchmoreinHepG2/pcDNA3-Xcells(980/2000)thanHepG2(420/2000),HepG2/pcDNA3cells(520/2000)(P<0.05andP<0.01).Evaluatedbysemi-quantifiedRT-PCR,theexpressionlevelofFas/FasLwassignificantlyhigherinHepG2cellstransfectedwithHBxthaninHepG2andHepG2/pcDNA3cells(P<0.05andP<0.01).Bax/Bcl-xLexpressionlevelwasalsoelevatedinHepG2/pcDNA3-Xcells(P<0.05andP<0.01).Expressionofc-mycwasmarkedlyhigherinHepG2/pcDNA3-XcellsthaninHepG2andHepG2/pcDNA3cells(P<0.05andP<0.01).CONCLUSION:HBVXgenecanimpaircellproliferationcapacity,improvecellapoptosis,andupregulateexpressionofapoptosisfactors.TheinterventionofHBVXgeneontheexpressionofapoptosisfactorsmaybeapossiblemechanismresponsibleforthechangeincellapoptosisandproliferation.
简介:目的了解HBV逆转录酶区M204位点单独突变患者与逆转录酶区M204+A181T联合突变患者临床特征的异同。方法对发生HBV逆转录酶区M204位点单独突变与逆转录酶区M204+A181T联合突变的慢性乙型肝炎患者血清HBsAg、HBVDNA和ALT水平进行统计学分析,并对所有患者的核苷(酸)类药物治疗史进行回顾性调查。结果逆转录酶区M204位点单独突变与逆转录酶区M204+A181T联合突变患者比,后者不会造成HBsAg和HBVDNA水平的下降(P值分别为0.3020和0.5917),也不会引起ALT(P=0.8001)的升高。此外,在核苷(酸)类药物应用方面,前者中单用拉米夫定的比例最高(41.38%),后者中由拉米夫定换用阿德福韦的比例最高(34.15%)。结论rtM204位点单独突变与rtM204+rtA181T突变患者引起突变的核苷(酸)类药物使用情况有所不同,但两组病毒学指标的水平无明显的差异。
简介:目的探讨M受体拮抗剂在治疗慢性前列腺炎中的作用。方法将符合入组条件的病人采用多中心、随机的方法分成三组,分别为A组(左氧氟沙星,为对照组),B组(舍尼亭组),C组(左氧氟沙星十舍尼亭组)。分别于治疗前、治疗后6周观察前列腺炎症状指数评分(CPSI)、前列腺液常规、尿流率的变化情况。结果舍尼亭在治疗慢性前列腺炎的症状方面有着重要的作用,舍尼亭联合左氧氟沙星治疗慢性前列腺炎能使病人的主、客观症状得到改善,治疗前后有显著性差异(P〈0.05)。结论M受体拮抗剂能够改善慢性前列腺炎病人的主观症状,在客观指标上改变不明显。M受体拮抗剂联合抗生素是治疗慢性前列腺炎的一种较好的方法。
简介:AIMTodeterminetheroleofcorticotropinreleasingfactorreceptor(CRF2)inepithelialpermeabilityandenterocytecelldifferentiation.METHODSForthispurpose,weusedratSpragueDawleyandvariouscoloncarcinomacelllines(SW620,HCT8R,HT-29andCaco-2celllines).ExpressionofCRF2proteinwasanalyzedbyfluorescentimmunolabelinginnormalratcolonandthenbywesternblotindissociatedcolonicepithelialcellsandinthelysatesofcoloncarcinomacelllinesorduringtheearlydifferentiationofHT-29cells(tenfirstdays).ToassesstheimpactofCRF2signalingoncoloniccelldifferentiation,HT-29andCaco-2cellswereexposedtoUrocortin3recombinantproteins(Ucn3,100nmol/L).Insomeexperiments,cellswerepre-exposedtotheastressin2b(A2b)aCRF2antagonistinordertoinhibittheactionofUcn3.Intestinalcelldifferentiationwasfirstanalyzedbyfunctionalassays:thetrans-cellularpermeabilityandthepara-cellularpermeabilityweredeterminedbyDextran-FITCintakeandmeasureofthetransepithelialelectricalresistancerespectively.Morphologicalmodificationsassociatedtoepithelialdysfunctionwereanalyzedbyconfocalmicroscopyafterfluorescentlabelingofactin(phaloidin-TRITC)andintercellularadhesionproteinssuchasE-cadherin,p120ctn,occludinandZO-1.Theestablishmentofmatureadherensjunctions(AJ)wasmonitoredbyfollowingthedistributionofAJproteinsinlipidraftfractions,afterseparationofcelllysatesonsucrosegradients.Finally,themRNAandtheproteinexpressionlevelsofcharacteristicmarkersofintestinalepithelialcell(IEC)differentiationsuchasthetranscriptionalfactorkrüppel-likefactor4(KLF4)orthedipeptidylpeptidaseIV(DPPIV)wereperformedbyRT-PCRandwesternblotrespectively.ThespecificactivitiesofDPPIVandalkalinephosphatase(AP)enzymesweredeterminedbyacolorimetricmethod.RESULTSCRF2proteinispreferentiallyexpressedinundifferentiatedepithelialcellsfromthecryptsofcolonandinhumancoloncarcinoma
简介:Medicaltherapyfortype2diabetesmellitusisineffectiveinthelongtermduetotheprogressivenatureofthedisease,whichrequiresincreasingmedicationdosesandpolypharmacy.Conversely,bariatricsurgeryhasemergedasacost-effectivestrategyforobesediabeticindividuals;ithaslowcomplicationratesandresultsindurableweightloss,glycemiccontrolandimprovementsinthequalityoflife,obesity-relatedco-morbidityandoverallsurvival.Thefindingthatglucosehomeostasiscanbeachievedwithaweightloss-independentmechanismimmediatelyafterbariatricsurgery,especiallygastricbypass,hasledtotheparadigmofmetabolicsurgery.However,theprimaryfocusofmetabolicsurgeryisthealterationofthephysio-anatomyofthegastrointestinaltracttoachieveglycemiccontrol,metaboliccontrolandcardio-metabolicriskreduction.Todate,metabolicsurgeryisstillnotwelldefined,asitisusedmostfrequentlyforlessobesepatientswithpoorlycontrolleddiabetes.Themechanismofglycemiccontrolisstillincompletelyunderstood.Publishedresearchfindingsonmetabolicsurgeryarepromising,butmanyaspectsstillneedtobedefined.Thispaperexaminestheproposedmechanismofdiabetesremission,theefficacyofdifferenttypesofmetabolicprocedures,thedurabilityofglucosecontrol,andtherisksandcomplicationsassociatedwiththisprocedure.Weproposeatailoredapproachfortheselectionoftheidealmetabolicprocedurefordifferentgroupsofpatients,consideringtheindicationsandprognosticfactorsfordiabetesremission.
简介:目的探讨微小RNA-363(miR-363)靶向调控E2F转录因子3(E2F3)的表达对HepG2细胞增殖和凋亡的影响。方法体外培养HepG2细胞,采用Lipofectamine法将miR-363抑制剂或其阴性对照转染到HepG2细胞,继续培养48h,收获细胞,采用四噻唑蓝(MTT)法测定细胞增殖率,使用流式细胞术法检测细胞凋亡率,采用实时荧光RT-PCR法检测HepG2细胞miR-363mRNA水平,采用WesternBlot法检测HepG2细胞E2F3、BAX和Caspase-3蛋白表达水平。结果对照组HepG2细胞增殖率为(96.4±9.7)%,显著高于抑制剂处理组【(72.3±6.5)%,P<0.05】,凋亡率为(8.2±1.4)%,显著低于抑制剂处理组【(9.7±0.8)%,P<0.05】;对照组HepG2细胞miR-363mRNA相对水平为(1.0±0.1),显著高于抑制剂处理组【(0.6±0.2),P<0.05】,E2F3蛋白表达量为(1.0±0.1),显著高于抑制剂处理组【(0.6±0.1),P<0.05】,而对照组HepG2细胞Bax和Caspase-3蛋白表达量分别为(0.4±0.0)和(0.5±0.1),均显著低于抑制剂处理组【(0.6±0.1)和(0.7±0.0),P均<0.05】。结论miR-363可靶向调控E2F3的表达,抑制HepG2细胞增殖,诱导其凋亡。本研究结果为肝癌靶向治疗提供了一定的理论依据。
简介:瞄准:Disabled-2(DAB2)是在卵巢的癌症识别否定地影响生长因素和块地岬活动的致有丝分裂信号转导变异的候选人tumor-suppressor基因。在最近的研究,我们用cDNA在ESCC观察了DAB2抄本的下面规定微数组。在现在的学习,我们试图在食道的肿瘤发生决定DAB2蛋白质的损失的临床的意义,假设那个DAB2倡导者调停hypermethylation的基因silencing可以说明蛋白质的损失。方法:DAB2表示被免疫组织化学在50主要食道的有鳞的房间分析癌(ESCC),30不同增生,15发育异常和10非恶意的食道的纸巾。决定倡导者hypermethylation是否在ESCC贡献DAB2表示的损失,DAB2倡导者的甲基化地位用methylation特定的PCR在DAB2免疫否定的肿瘤被分析。结果:DAB2蛋白质的损失在5/30(17%)被观察增生,10/15(67%)发育异常和34/50(68%)ESCC。DAB2蛋白质的重要损失从食道的正常粘膜被观察到增生,发育异常和侵略癌症(P(趋势)<0.001)。DAB2的倡导者hypermethylation在10中的2个被观察(20%)DAB2免疫否定的ESCC。结论:DAB2蛋白质表示的损失发生在食道的癌症的开发的早pre肿瘤的阶段并且在致瘤的小径下面被支撑。在ESCC的很少发生的DAB2倡导者甲基化建议渐成说基因silencing仅仅是在ESCC引起DAB2表示的损失的机制之一。
简介:肝脏的外分泌功能具有非常重要的作用,除了参与消化吸收以外,人体内大量化合物的代谢都需肝脏的处理并由胆汁排泄,这个外分泌过程就需要肝胆转运系统的参与,肝脏的转运系统中包含着许多的载体蛋白,这些载体蛋白与肝炎,肝内胆汁郁积,肿瘤化疗药物的耐受以及多种肝脏遗传性疾病有着密切的关系.本文所要综述的多药耐药相关蛋白2(themuhidrugresistanceprotein2,MRP2)就是这类载体中的一个.目前关于MRP2的研究主要集中在MRP2介导的肿瘤耐药以及MRP2缺乏所导致的高胆红素血症这两个方面.本文从MRP2的结构功能、与肿瘤化疗耐药之间的关系,MRP2缺乏与高胆红素血症之间的关系以及MRP2表达障碍时MRP3对其代偿作用等方面,对MRP2的研究进展作一简单介绍.
简介:AIM:RecombinedplasmidpETNF-P16wasconstructedtoinvestigateitsexpressionpropertiesinesophagealsquamouscarcinomacelllineEC9706inducedbyX-rayirradiationandthefeasibilityofgene-radiotherapyforesophagealcarcinoma.METHODS:RecombinedplasmidpETNF-P16wasconstructedandtransfectedintoEC9706cellswithlipofectamine.ELISA,Westernblot,andimmunocytochemistrywereperformedtodeterminetheexpressionpropertiesofpETNF-P16inEC9706aftertransfectioninducedbyX-rayirradiation.RESULTS:EukaryoticexpressionvectorpETNF-P16wassuccessfullyconstructedandtransfectedintoEC9706cells.TNFαexpressionsweresignificantlyincreasedinthetransfectedcellsafterdifferentdosesofX-rayirradiationthaninthoseafter0Gyirradiation(1192.330-2026.518pg/mL,P<0.05-0.01),andtheTNFαexpressionsandP16weresignificantlyhigher6-48hafter2GyX-rayirradiation(358.963-585.571pg/mL,P<0.05-0.001).NoP16expressionwasdetectedinnormalEC9706cells.However,therewasstrongexpressioninthetransfectedandirradiationgroups.CONCLUSION:X-rayirradiationinductioncouldsignificantlyenhanceTNFαandP16expressioninEC9706cellstransfectedwithpETNF-P16plasmid.Theseresultsmayprovideimportantexperimentaldataandtherapeuticpotentialforgene-radiotherapyofesophagealcarcinoma.
简介:瞄准:检验矩阵metalloproteinase-2(MMP-2)在胃的癌症纸巾并且到的表示与淋巴节点评估它的关系微转移。方法:作者从30学习了850淋巴结resected与淋巴腺切除术经历了胃切除术用的有胃的癌的病人颠倒抄写聚合酶链反应(RT-PCR)试金除了他染色。肿瘤纸巾的MMP-2表示被免疫检测组织化学的技术(EliVision加)。结果:MMP-2表示在21是积极的(70%)在9的盒子和negative(30%)盒子。没有重要关联在象年龄,性,肿瘤地点,肿瘤直径,Lauren分类和淋巴的侵略那样的MMP-2表示和另外的变量之间被发现。相反,MMP-2表示与肿瘤渗入的深度显著地相关(P=0.022),淋巴节点转移(P=0.030)并且肿瘤区别(P=0.043)。淋巴节点微转移在77被检测(12.5%)14的淋巴节点(46.7%)胃的癌病人。MMP-2表示在12是积极的(85.7%)有淋巴节点的14个病人微转移,并且在9(56.3%)没有淋巴节点的16个病人微转移(P=0.118)。结论:我们的结果证明那MMP-2表情与肿瘤侵略,肿瘤区别和淋巴节点转移有重要关联。MMP-2表示可以是一个重要生物特征和胃的癌的重要预示的参数。我们也断定MMP-2可以参予淋巴节点的发展胃的癌的微转移。进一步的调查被需要得出一个结论。