简介:例1,女,27岁,表型正常,妊娠3次,均于孕50天左右出现宫内发育停滞,胚胎死亡,3月内自然流产或行人工流产。细胞遗传学检查,G带核型为46,XX,t(3;4)(3pter→3q25∶∶4P15.2→4Pter;14qter→4P15.2∶∶3q25→3qter)其丈夫核型正常。例2例1之母,表型正常,曾妊娠4次,孕1于3个月自然流产,孕2~4,生育表型正常一男二女,例1为其长女。细胞遗传学检查,G带核型与例1完全相同。其丈夫核型正常。其子和次女拒绝染色体检查,但均生育正常子女。讨论异常核型携带者在减数分裂中,由于联会异常,形成单体或三体的配
简介:AbstractToinvestigatetheroleofCD4^+helperT(Th)cellsinthememoryCTL-mediatedanti-tumorimmunity,theRAG-1geneknockoutmicewereadoptivelytransferredwithOT-1cellstogeneratethememoryCTL,theC57B1/6miceimmunizedwiththeepitopepeptideofOVAspecificThcellsandwithdifferentadjuvantswereadopfivelytransferredwiththesememory-CTLs,andthentheanimalswerechallengedwithtumorcellsEGT.ItwasfoundthatalthoughthesimpleimmunizationofmicewiththeepitopepeptideoftheOVAspecificThcellscouldgeneratemoreeffectCTL,butthiseffectwasnotsostrongenoughtoresistcompletelythechallengeswithtumorcells.Nevertheless,thememoryCTL-mediatedanti-tumorimmuneeffectrequiredthehelpsofTh1andTh2cells.Thecross-regulationbetweenThlandTh2cellsseemedtobebeneficialforthehosttogeneratemoreeffectorCTLformountinganefficientanti-tumorresponse.ItconcludedthattheinteractionbetweenThlandTh2cellsmightbemoreimportantthanthesinglesubsetofThcellsinthememoryCTL-mediatedanti-tumorimmuneresponse.Moreattentionshouldbepaidinthisregardforthefuturestudies.
简介:TheaimofthepresentstudywastodeterminetheefficacyofimmunotherapywithdendriticcellstoelicitEBV-specificCTL-immunityinadvancedcasesofEBV-positivepatientswithnasopharyngealcarcinoma(NPC)andtodeterminethesafetyandtoxicityofthispreparation.NinecasesofhistologicallyconfirmedpatientswithNPCundergoingtreatmentwithradiologicaltherapywereenrolledinthisstudy.Dendriticcells,generatedinvitrofrombloodmonocytesofpatientswereculturedandmaturedwithcytokinesandtheninfectedwithrecombinantadenovirusvaccinecontainingEBV-latentmembraneprotein-2(Ad-LMP2).On9days'cultivationofcells,thematuredDCswereharvested,irradiatedwithCoandtheninjectedintradermallytopatientswithNPC.Theinjectionswereperformed3timestotally.Afterimmunization,theCTLresponseswereassayedbymeansofcytotoxicityandepitope-specificIFN-γproduction.Theresultsofthistrialshowedthatallpatientscouldtoleratethiskindoftreatmentwithoutanysideeffect,duringwhichmarkedincreaseofLMP2-specificCTL-responsescouldbedemonstratedin5patientsofthisgroup.AndthelevelofIgA/VCAantibodydecreasedin8of9patients,thusaccountingforabetterprognosisforthesepatients.Allpatientswillbefollowedupforanotheroneyear.Atleast,thepresentworkshowsthatintradermalvaccinationwithautologousDCsinfectedwithrecombinantAd-LMP2adenovirusisasafeprocedureinNPCpatients,inwhichthisprocedurecanenhancetheLMP2-specificCTLresponsesinpatients.Thesedataareencouragingtodevelopmoreeffectivevaccinestrategiesforthetreatmentofnasopharyngealcarcinoma.
简介:目的:分析真核表达产物CTL4-Ig对T细胞活化功能的影响。方法:构建并用真核表达系统表达CTLA4-Ig,通过蛋白A亲合柱纯化获得纯品;然后观察CTLA4-Ig对淋巴细胞转化功能及T细胞表面分子CD25表达的影响;用^3H-TdR掺入法研究CTLA4-Ig对混合淋巴细胞反应的影响。结果:CTLA4-Ig抑制PHA对淋巴细胞的转化;同时,抑制PHA刺激的淋巴细胞表面CD25分子的表达,抑制率达53%,与对照相比抑制显著(P<0.05),且这种效应有剂量依赖性;CTLA4-Ig抑制单向混合淋巴细胞反应,抑制率选87.53%,与对照相比亦抑制显著(P<0.05).且效应亦呈剂量依赖性。结论:CTLA4-Ig能有效阻断T细胞的活化,并且阻断效应是通过多种信号途径起作用的。
简介:目的研究TCRαβT细胞和TCRγδT细胞在大鼠小肠上皮内各肠段间的分布规律.方法采用免疫组化和体视学测量方法,对10只180~220g的雄性Wistar大鼠小肠上皮内T细胞的数密度、体积密度、表面积密度、平均体积和表面积体积比进行测量,并比较它们在各肠段间的差异.结果从十二指肠到回肠各肠段上皮内CD3^+T细胞和TCRγδT细胞的体积密度、数密度和表面积密度均依次降低;各肠段上皮内TCRαβT细胞的体积密度、数密度和表面积密度则依次有增大的趋势;各肠段上皮内TCRγδT细胞的平均体积大于TCRαβT细胞的;各肠段上皮内CD3^+T细胞、TCRαβT细胞和TCRγδT细胞的算术平均体积和细胞表面积体积比均变化不大,提示各肠段间同种T细胞的体积接近形状相似.结论总体上,从十二指肠到回肠大鼠小肠上皮内T细胞数依减少;而TCRγδT细胞的体积比TCRαβT细胞的大.
简介:Objective:ThisstudyanalyzedtheTlymphocytesandThl/Th2typecytokineprofileshiftintheperipheralbloodofpatientswithrecurrentgenitalherpes(RGH).Methods:Immunofluorescentstainingofcellsurfaceantigenandintracellularcytokines(IL-2,IL-4,IL-12,IFN-r)inperipheralbloodfrom20RGHpatientsand10controlswereanalyzedusingflowcytometrictechniques.Results:RGHpatientshadsignificantlylowerlevelsofCD3^+Tcells,CD4^+TcellsandCD4^+T/CD8^+Tcellsratiocomparedtocontrollevels(P<0.001),andIL-2-producing,IFN-r-producingandIL-12-producingTcellswereincreasedinRGHpatients(CD4^+T:P<0.001,CD8^+T:P<0.05respectively),whereasIL-4-producingTcellswereincreasedinRGHpatientscomparedtocontrols(CD4+T:P<0.05;CDS^+T:P<0.001respectively).Conclusions:RGHpatientshaveTlymphocytesubsetvariationsandThl/Th2cytokinechanges.TheincreaseinTh2cellsThl/Th2imbalancemayhaveimportantimplicationsforRGHpathogenesis.
简介:目的探讨心电图活动平板试验(TET)阳性患者Q-T离散度(QTd)变化的意义。方法93例受试者根据TET分为阳性组(A组)38例,男/女=13/25,年龄55±8岁和阴性组(B组)55例,男/女=26/29,比较两组TET前后QTd、QTcd的变化。结果运动前QTd、QTcdA组分别为41±15ms和46±18ms,B组分别(38±14)ms和(46±16)ms,两组比较无显著差异。达次极量运动时A组QTd为(51±17)ms与运动前比较有显著性差异(P<0.05),QTcd为(79±28)ms,与运动前比较有非常显著性差异(P<0.01),B组QTd、QTcd分别为(37±16)ms和(51±19)ms,与运动前比较无显著性差异。两组运动后QTd、QTcd比较有非常显著性差异(P<0.01)。结论TET阳性与QTd之间有良好的临床相关性。可反映运动负荷造成的心肌缺血。
简介:Triptolideisanatural,biologicallyactivecomponentderivedfromChineseherbTripterygiumWilfordiiHookF.(TWHF)whichiseffectiveintheclinicaltreatmentofautoimmunediseases,however,themechanismsbywhichtriptolideexertsimmunosuppressionremainfullyunderstood.Theprimaryofthisstudyistodemonstratewhethertriptolidecanaffectphenotype,cytokineproductionandallogeneicTcell-stimulatorycapacityofdendriticcells(DCs)whicharecriticalintheinductionofimmuneresponseortolerance.PhenotypicanalysisshowthattriptolidedoesnotaffecttheexpressionofMHC(Ia^b),CD80,CD86andCD40ofDCstimulatedwithornotLPS,butsignificantlyinhibitsIL12p70productionbyDCinadose-dependentmanner.Triptolide-treatedDCsexhibitareducedcapacitytostimulateproliferationofallogeneicCD4^+Tlymphocytes.Therefore,triptolide-mediatedimmunosuppressionmaydue,inpart,totheinhibitionofIL-12p70productionandimpairmentofallogeneicTcell-stimulatorycapacityofDCs.Ourresultsmayprovideapossiblemechanisticexplanationfortheeffectivenessoftriptolideinthetreatmentofautoimmunediseases.
简介:<正>先天性长Q-T间期综合征的治疗有多种选择方法[1],包括β受体阻滞剂、左侧交感神经节切除、人工心脏起搏、ICD、基因治疗等。而国人对