简介:AIM:Toinvestigatetheeffectsofc-mybantisenseRNAoncellproliferationandtheexpressionofc-myb,TGF-β1andα1-Ⅰcollageninculturedhepaticstellatecells(HSC)fromrats.METHODS:Recombinantretroviralvectorofc-mybantisensegene(pDOR-myb)wasconstructed,andthentransfectedintoretroviralpackagecelllinePA317bymeansofDOTAP.ThepseudovirusesproducedfromtheresistantPA317cellswereselectedwithG418toinfectHSCsisolatedfromratlivers.Thecellproliferationwasmeasuredby3-[4,5-Dimethylthiazolzyl]-2,5-diphenyltetrazo-diumbromide(MTT)method.Theexpressionofc-myb,α1-ⅠcollagenandTGF-β1rnRNA,andc-mybproteininHSCswasdetectedwithsemi-quantitivereversetranseription-polymerasechainreaction(RT-PCR)andWestern-blotrespectively.RESULTS:HSCsfromratswereisolatedsuccessfullywiththeviability>98%.InthepDOR-mybinfectedHSCs,thecmybproteinexpression,cellproliferation,andα1-ⅠcollagenandTGF-β1mRNAexpressionwererepressedsignificantlycomparedwiththeircorrespondingcontrolgroups(P<0.01).CONCLUSION:c-mybplaysakeyroleinactivationandproliferationofHSC.c-mybantisenseRNAcaninhibitcellproliferation,α1-ⅠcollagenandTGF-β1mRNAexpression,suggestingthatinhibitionofc-mybgeneexpressionmightbeapotentialwayforthetreatmentofliverfibrosis.
简介:AIMToinvestigatetheroleofthecomplement5a(C5a)/C5areceptor(C5aR)pathwayinthepathogenesisofacuteliverfailure(ALF)inamousemodel.METHODSBALB/cmicewererandomlyassignedtodifferentgroups,andintraperitonealinjectionsoflipopolysaccharide(LPS)/D-galactosamine(D-GalN)(600mg/kgand10μg/kg)wereusedtoinduceALF.TheKaplanMeiermethodwasusedforsurvivalanalysis.Serumalanineaminotransferase(ALT)levels,atdifferenttimepointswithina1-wkperiod,weredetectedwithabiochemistryanalyzer.Pathologicalexaminationoflivertissuewasperformed36hafterALFinduction.Serumcomplement5(C5),C5a,tumornecrosisfactor-α(TNF-α),interleukin(IL)-1β,IL-6,high-mobilitygroupproteinB1(HMGB1)andsphingosine-1-phosphatelevelsweredetectedbyenzyme-linkedimmunosorbantassay.Hepaticmorphologicalchangesat36hafterALFinductionwereassessedbyhematoxylinandeosinstaining.ExpressionofC5aR,sphingosinekinase1(SphK1),p38-MAPKandp-p38-MAPKinlivertissue,peripheralbloodmononuclearcells(PBMCs)andperitonealexudativemacrophages(PEMs)ofmiceorRAW264.7cellswasanalyzedbywesternblotting.C5aRmRNAlevelsweredetectedbyquantitativereal-timePCR.RESULTSActivationofC5andup-regulationofC5aRwereobservedinlivertissueandPBMCsofmicewithALF.BlockadeofC5aRwithaC5aRantagonist(C5aRaC5aRa)significantlyreducedthelevelsofserumALT,inflammatorycytokines(TNF-α,IL-1βandIL-6)andHMGB1,aswellasthelivertissuedamage,butincreasedthesurvivalrates(P<0.01forall).BlockadeofC5aRdecreasedSphK1expressioninbothlivertissueandPBMCssignificantlyat0.5hafterALFinduction.C5aRapretreatmentsignificantlydownregulatedthephosphorylationofp38-MAPKinlivertissuesofALFmiceandC5astimulatedPEMsorRAW264.7cells.Moreover,inhibitionofp38-MAPKactivitywithSB203580reducedSphK1proteinproductionsignificantlyinPEMsafterC5astimulation.CONCLUSIONTheC5a/C5aRpath
简介:AIM:Toelucidatethemechanism(s)bywhichS-adenosyl-L-methionine(SAM)decreaseshepatitisCvirus(HCV)expression.METHODS:WeexaminedtheeffectsofSAMonviralexpressionusinganHCVsubgenomicrepliconcellculturesystem.Huh7HCV-repliconcellsweretreatedwith1mmol/LSAMfordifferenttimes(24-72h),thentotalRNAandproteinswereisolated.cDNAwassynthesizedandrealtime-PCRwasachievedtoquantifyHCV-RNA,superoxidedismutase1and2(SOD-1,SOD-2)catalase,thioredoxin1,methionineadenosyltransferase1Aand2A(MAT1A,MAT2A)expression,andGAPDHandRPS18asendogenousgenes.Expressionofcellularandviralproteinwasevaluatedbywestern-blotanalysisusingantibodiesvsHCV-NS5A,SOD-1,SOD-2,catalase,thioredoxin-1,MAT1A,MAT2A,GAPDHandactin.TotalglutathionelevelsweremeasuredatdifferenttimesbyEllman’srecyclingmethod(0-24h).Reactiveoxidativespecies(ROS)levelswerequantifiedbythedichlorofluoresceinassay(0-48h);Pyrrolidindithiocarbamate(PDTC)wastestedasanantioxidantcontrolandH2O2asapositiveoxidantagent.RESULTS:SAMexpositiondecreasedHCV-RNAlevels50%-70%comparedtonon-treatedcontrols(24-72h).SAMinducedasynergicantiviraleffectwithstandardIFNtreatmentbutitwasindependentofIFNsignaling.Inaddition,1mmol/LSAMexpositiondidnotmodifyviralRNAstability,butitneedscellulartranslationmachineryinordertodecreaseHCVexpression.TotalglutathionelevelsincreaseduponSAMtreatmentinHCV-repliconcells.Transcriptionalantioxidantenzymeexpression(SOD-1,SOD-2andthioredoxin-1)wasincreasedatdifferenttimesbutinterestingly,therewasnosignificantchangeinROSlevelsuponSAMtreatment,contrarytowhatwasdetectedwithPDTCtreatment,whereanaverage40%reductionwasobservedinexposedcells.TherewasaturnoverfromMAT1A/MAT2A,sinceMAT1Aexpressionwasincreased(2.5fold-timesat48h)andMAT2Awasdiminished(from24h)uponSAMtreatmentatboththetranscriptionalandtranslationall
简介:目的研究c—erbB—2和c—myc癌基因在胃癌组织中扩增的意义。方法应用非放射性原位杂交技术检测81例胃癌标本中c—erbB—2和c—myc的扩增情况。结果C—erbB—2和c—myc在胃癌中的扩增率分别为50.6%和67.9%。c—erbB—2基因与胃癌组织分化程度、浸润深度及淋巴结转移有关(P〈0.05),分化程度越差、浸润深度越深、淋巴结有转移,c—erbB—2基因表达率越高,而C—myc癌基因与胃癌组织分化程度、浸润深度及淋巴结转移无关。两基因的扩增具有显著的相关性(x^2=7.26,P〈0.01)。结论c—erbB—2和c—myc扩增是胃癌发生过程中的一个重要的生物学因素,且两者具有较好的协同作用。
简介:目的掌握影响肝性脑病(HE)预后的危险因素。方法对国内发表资料完整、统计设计合理的11个HE研究(共1131例)进行荟萃分析。结果HE诱因分别为:消化道出血43.8%,感染33.9%,电解质紊乱29.1%,大量利尿和/或放腹水14.5%,饮食不节14.2%,肾功能衰竭13.0%,手术/创伤6.0%,药物4.5%,输血/输复合氨基酸3.2%,腹泻2.4%,便秘1.8%,原因未明/无2.7%.与HE死亡率相关因素包括:①诱因数:单一诱因死亡率33%,二种诱因为71.4%;三种或以上诱因为92.3%;三组间差异显著(P〈0.01)。②诱因纠正情况:可纠正组死亡率为18.2%,未纠正组为100%,二组间差异显著(P〈0.01)。③HE分期:Ⅰ期死亡率为O%,Ⅱ期为4.9%.Ⅲ期为34.4%,Ⅳ期为85.1%,四组间差异显著(P〈0.01)。④肝功(Child—pugh分级):A级死亡率为19.8%,B级为49.8%,C级为80.8%,三组间差异显著(P〈0.01)。结论重视HE预后的危险因素,警惕多种诱因并存,消除其不利影响。保护肝功能是改善HE预后的重要途径。
简介:瞄准:与ulcerative(UC)在病人的结肠的粘膜检验metalloproteinase-1(MMP-1)和metalloproteinase-1(TIMP-1)的织物禁止者的表示。方法:颠倒抄写聚合酶链反应(RT-PCR),免疫组织化学被用来与UC和控制在病人在mRNA和蛋白质层次学习MMP-1和TIMP-1的表达式。在MMP-1mRNA,TIMP-1mRNA,MMP-1mRNA/TIMP-1mRNA比率和有UC的病人的临床的症状的严厉之间的关系也被分析。结果:MMP-1mRNA和TIMP-1mRNA在的表示溃烂并且煽动了结肠的粘膜在非煽动的结肠的粘膜比那显著地高(P<0.001),但是有不,统计上,在UC病人和正常的非煽动的结肠的粘膜的有效差量控制(P>0.05)。在UC病人的溃烂的结肠的粘膜的MMP-1和TIMP-1的mRNA表达式被80褶层和2.2褶层增加,分别地什么时候与正常控制相比。在煽动的结肠的粘膜,增加分别地是30褶层和1.6褶层。Immunohistochemical分析显示出那在之中溃烂,发炎,并且UC病人的非煽动的结肠的mucosae和正常控制,MMP-1表示的积极的率分别地是87%,87%,40%和35%,并且TIMP-1表示的积极的率分别地是89%,89%,80%和75%。而且,MMP-1mRNA,TIMP-1mRNA和MMP-1mRNA/TIMP-1mRNA比率的表示与临床的症状(P<0.05)的严厉被相关。结论:在结肠的粘膜在UC病人引起细胞外的矩阵(ECM)和溃疡的过多的水解作用的diseased的MMP-1的过多的表示。MMP-1mRNA,TIMP-1mRNA和MMP-1mRNA/TIMP-1mRNA比率能被用作简历标记与UC在病人判定临床的症状的严厉。外长的TIMP-1或MMP-1禁止者治疗是为有UC的病人的新奇治疗。
简介:AIMToinvestigatetherolesandinteractionsofmutThomolog(MTH)-1andhypoxia-induciblefactor(HIF)-1αinhumancolorectalcancer(CRC).METHODS:TheexpressionanddistributionofHIF-1αandMTH-1proteinsweredetectedinhumanCRCtissuesbyimmunohistochemistryandquantitativerealtimepolymerasechainreaction(qRT-PCR).SW480andHT-29cellswereexposedtonormoxiaorhypoxia.ProteinandmRNAlevelsofHIF-1αandMTH-1wereanalyzedbywesternblottingandqRT-PCR,respectively.InordertodeterminetheeffectofHIF-1αontheexpressionofMTH-1andtheamountof8-oxodeoxyguanosinetriphosphate(dGTP)inSW480andHT-29cells,HIF-1αwassilencedwithsmallinterferingRNA(siRNA).GrowthstudieswereconductedoncellswithHIF-1αinhibitionusingaxenografttumormodel.Finally,MTH-1proteinwasdetectedbywesternblottinginvivo.RESULTS:HighMTH-1mRNAexpressionwasdetectedin64.2%ofcases(54/84),andthiswassignificantlycorrelatedwithtumorstage(P=0.023)andsize(P=0.043).HIF-1αproteinexpressionwascorrelatedsignificantlywithMTH-1expression(R=0.640;P〈0.01)inhumanCRCtissues.HypoxicstressinducedmRNAandproteinexpressionofMTH-1inSW480andHT-29cells.InhibitionofHIF-1αbysiRNAdecreasedtheexpressionofMTH-1andledtotheaccumulationof8-oxo-dGTPinSW480andHT-29cells.Intheinvivoxenografttumormodel,expressionofMTH-1wasdecreasedintheHIF-1αsiRNAgroup,andthetumorvolumewasmuchsmallerthanthatinthemocksiRNAgroup.CONCLUSION:MTH-1expressioninCRCcellswasupregulatedviaHIF-1αinresponsetohypoxicstress,emphasizingthecrucialroleofHIF-1α-inducedMTH-1intumorgrowth.
简介:目的观察端粒酶催化亚基(hTERT)、c-myc在胆囊癌中的表达,探讨hTERT及c-myc与胆囊癌的相关性。方法采用免疫组织化学方法检测15例胆囊癌组织、癌旁组织、正常胆囊黏膜及20例胆囊腺瘤性息肉组织hTERT、c-myc的表达。结果①正常胆囊黏膜、胆囊腺瘤性息肉组织、癌旁组织及胆囊癌组织hTERT的阳性表达率分别为6,67%(1/15)、10.00%(2/20)、33.33%(5/15)及80%(12/15);c-myc阳性表达率分别为20.00%(3/15)、45.00%(9/20)、40%(6/15)及86.67%(13/15);胆囊癌组织中hTERT与c-myc阳性表达率明显高于其它组织(P〈0.05);②胆囊癌组织hTERT和c-myc表达与淋巴结转移有关,伴淋巴结转移的胆囊癌hTERT及c-myc阳性表达率明显高于无淋巴结转移者(P〈0.05);③c-myc在hTERT阳性的胆囊癌组织的表达率明显高于hTERT阴性组(P〈0.05)。结论hTERT过度表达在胆囊癌的发生发展过程中具有重要作用,c-myc在转录水平上调控hTERT的表达,进而激活端粒酶促进胆囊癌的形成。
简介:背景:临床上评估炎症性肠病活动性的方法有临床活动度、C反应蛋白(CRP)和血沉等,三者常不一致。目的:探讨CRP评估炎症性肠病活动性的价值。方法:以Logistic回归法分析80例克罗恩病(CD)、70例溃疡性结肠炎(UC)患者血清CRP与血沉、临床活动度、内镜表现活动性、组织学活动性、低白蛋白血症、贫血、白细胞升高的关系;比较临床严重度、病变部位和药物治疗对CRP的影响。结果:CD中CRP与血沉相关;UC中CRP与血沉、外周血白细胞升高相关。CRP在活动性CD中显著升高(P〈0.01),重度CD和结肠CD中CRP升高较其他各组明显(P〈0.05);活动性UC中CRP亦显著升高(P〈0.01),重度组中CRP升高较其他组明显(P〈0.05)。药物有效控制临床表现时.CRP显著下降(P〈0.01),复发时重新升高(P〉0.05)。结论:CRP升高更适于反映中至重度结肠CD和UC的活动性:具有快速反映药物治疗有效性的特点。
简介:AIM:Toevaluatetheimpactofsociodemographic/clinicalfactorsonearlyvirologicalresponse(EVR)topegin-terferon/ribavirinforchronichepatitisC(CHC)inclinicalpractice.METHODS:Weconductedamulticenter,cross-sectional,observationalstudyinHepatologyUnitsof91Spanishhospitals.CHCpatientstreatedwithpeginterferonα-2aplusribavirinwereincluded.EVRwasdefinedasundetectablehepatitisCvirus(HCV)-ribonucleicacid(RNA)or≥2logHCV-RNAdecreaseafter12wkoftreatment.AbivariateanalysisofsociodemographicandclinicalvariablesassociatedwithEVRwascarriedout.IndependentfactorsassociatedwithanEVRwereanalyzedusingamultipleregressionanalysisthatincludedthefollowingbaselinedemographicandclinicalvariables:age(≤40yearsvs>40years),gender,race,educationallevel,maritalstatusandfamilystatus,weight,alcoholandtobaccoconsumption,sourceofHCVinfection,alanineaminotransferase(ALT)andaspartateaminotransferase(AST)levels,andgammaglutamyltranspeptidase(GGT)(≤85IU/mLvs>85IU/mL),serumferritin,serumHCV-RNAconcentration(<400000vs≥400000),genotype(1/4vs3/4),cirrhoticstatusandribavirindose(800/1000/1200mg/d).RESULTS:Atotalof1014patientswereincludedinthestudy.Meanageofthepatientswas44.3±9.8years,70%weremale,and97%wereCaucasian.ThemainsourcesofHCVinfectionwereintravenousdrugabuse(25%)andbloodtransfusion(23%).SeventyeightpercentwereinfectedwithHCVgenotype1/4(68%hadgenotype1)and22%withgenotypes2/3.TheHCV-RNAlevelwas>400000IU/mLin74%ofpatients.ThemeanALTandASTlevelswere88.4±69.7IU/mLand73.9±64.4IU/mL,respectively,andmeanGGTlevelwas82±91.6IU/mL.Themeanferritinlevelwas266±284.8μg/L.Only6.2%ofpatientspresentedwithcirrhosis.Allpatientsreceived180mgofpeginterferonα-2a.Themostfrequentlyusedribavirindoseswere1000mg/d(41%)and1200mg/d(41%).Theplannedtreatm
简介:瞄准:为了在病人调查胰岛素抵抗和糖尿病的临床的参数的流行,由长期的丙肝(CHC)或长期的肝炎B(CHB)影响了。方法:我们回顾地评估了经历了肝活体检视的852个连续病人(726CHC和126CHB)。我们记录了年龄,性别,中高音,类型2糖尿病或新陈代谢的症候群(MS),身体团索引(BMI),和明显的疾病持续时间(增加)。结果:年龄,增加,BMI,在有温和/中等的肝纤维变性的病人的MS和糖尿病的流行在CHC是显著地更高的。然而,脂肪变性的度和在肝活体检视评估的肝纤维变性没在CHC和CHB病人之间不同。在多变量分析,年龄,性别,BMI,中高音和糖尿病是为在CHC的肝纤维变性的独立风险因素,而仅仅年龄与在CHB的肝纤维变性有关。我们也评估了在重要脂肪变性之间的协会(>30%)并且年龄,性别,BMI,糖尿病,MS和肝纤维变性。糖尿病,BMI和肝纤维变性与脂肪变性>被联系30%在CHC,而仅仅年龄和BMI与在CHB的脂肪变性有关。结论:这些数据可以显示丙肝病毒感染是为胰岛素抵抗的一个风险因素。