简介:p90核糖体S6蛋白激酶(rihosomalS6kinase,RSK)为Ras信号转导通路下游途径的重要调控因子,对Ras通路起调控作用。近年发现RSK家族与恶性肿瘤发生、发展密切相关。本文就RSK家族与恶性肿瘤的关系作简要综述。
简介:ThehistogensisofextramammaryPaget’sdiseasehasnotbeensolvedandremainedcontroversial.EightcasesofextramammaryPaget’sdiseaseofgeni-tocruralregionwereinvestigatedbyalcianblueandPASstainandimmunoreactionofanti-CEAandanti-keratin.Itwasfoundthatthepatternandintensityofalcianblue,PASstainingwereidenticalforPagetcellsandsecretorycellsofapocrinesweatgland;andCEAimmunoreactivitywasuniformlyobservedinbothPagetcellsandeccrinesweatgland.Thekeratinimmunoreactionwaspositiveinkeratinocytes,apocrineandeccrinesweatgland,whereasPagetcellswerenegative.TheseresultssuggestedthatPagetcellsofextramammaryPaget’sdiseasecouldbederivedfrommultipotentialepidermalgermcells.
简介:目的:探讨S100A8、S100A9在子宫颈鳞癌及正常宫颈组织中的表达及其意义。方法:采用半定量的RT-PCR技术和免疫组织化学的方法,从mRNA及蛋白水平检测32例子宫颈鳞癌和15例正常宫颈组织中S100A8、S100A9的表达,及与不同临床病理参数的关系。结果:子宫颈鳞癌组织中,S100A8、S100A9在mRNA及蛋白水平上均低表达(P<0.05),其中,低分化肿瘤的表达明显低于高、中分化肿瘤(P<0.05)。结论:S100A8、S100A9在子宫颈鳞癌组织中低表达,且可能与鳞状细胞的分化程度相关。提示S100A8、S100A9低表达可能与子宫颈鳞癌的发生发展有关系。
简介:Charcot’s关节神经性关节病也称为Charcot’s关节病,1868年Charcot首先描述。此类疾病为无痛觉所引起,又有无痛性关节病之称,是一种较为罕见的神经营养性骨关节病,缺少特征性病理改变,易被误诊为其它疾病。笔者经治1例Charcot’s关节病误诊病例,原单位诊断为非特异性炎症改变。观察该病例的临床表现、病理学特点和影像学表现,并复习相关文献,旨在提高对该疾病的认识,减少或避免误诊。
简介:Psoriasin(S100A7)是一种分子量为22.9kD的同源二聚体蛋白,属于S100蛋白家族成员。通过与钙离子结合,参与细胞内外重要的生命活动。其基因定位于染色体1q21.2-q22。Psoriasin(S100A7)蛋白最初是从银屑病异常增生的角化细胞中分离得到的,故称为Psoriasin,即银屑素。Psoriasin在异常增生的角化细胞、膀胱鳞状细胞癌和原位及浸润乳腺癌中表达上调。Psoriasin这种分泌和表达特征有可能作为膀胱鳞状细胞癌和乳腺癌等恶性肿瘤的候选标志物。
简介:PROMOTIONOFINVITROGROWTHOFHUMANMEDULLOBLASTOMACELLSBYEXOGENEOUSIL-6LiuJiai刘佳;LiHong李宏;HamouMarie-France;NicolasdeTribolet(1Di...
简介:N^6-methyladenosine(m^6A)isanessentialRNAmodificationthatregulateskeycellularprocesses,includingstemcellrenewal,cellulardifferentiation,andresponsetoDNAdamage.Unsurprisingly,aberrantm6Amethylationhasbeenimplicatedinthedevelopmentandmaintenanceofdiversehumancancers.Alteredm6AlevelsaffectRNAprocessing,mRNAdegradation,andtranslationofmRNAsintoproteins,therebydisruptinggeneexpressionregulationandpromotingtumorigenesis.Recentstudieshavereportedthattheabnormalexpressionofm6Aregulatoryenzymesaffectsm6Aabundanceandconsequentlydysregulatestheexpressionoftumorsuppressorgenesandoncogenes,includingMYC,SOCS2,ADAM19,andPTEN.Inthisreview,wediscussthespecificrolesofm6A“writers",“erasers”,and“readers”innormalphysiologyandhowtheiralteredexpressionpromotestumorigenesis.Wealsodescribethepotentialofexploitingtheaberrantexpressionoftheseenzymesforcancerdiagnosis,prognosis,andthedevelopmentofnoveltherapies.
简介:Objective:Toexploretheprobabilityofvascularendothelialgrowthfactor(VEGF)antisenseoligodeoxynucleotidesasadevelopingnewtherapeuticstrategyforglioma.Methods:VEGFproteinexpressionwasdetectedbyS-Pimmunohistochemicaltechnique.TumorcellapoptosiswasobservedbyTUNELmethod.Results:Comparedwithcontrol,VEGFproteinexpressionwasinhibitedbyantisenseoligodeoxynucleotidesinvitro.Andtheinhibitoryeffectsincreasedwiththeincreasingconcentration.VEGFpositiveratewas82.10%incontrolgroup,whilein2.5,5,10(mol/LAODNgroups,theywere70.00%,57.85%,53.20%respectively.Noinhibitioneffectwasfoundinthecelllinestreatedwithmissenseandsenseoligodeoxynucleotides.Invivo,antisenseoligodeoxy-nucleotidestherapyalsoinhibitedVEGFproteinexpressionandinducedtheincreaseofapoptotictumorcells.However,ithasnoeffectontumorcellproliferation.Conclusion:ItishopefulthatVEGFantisenseoligodeoxynucleotidesmaybeanewgenetherapymethodtogliomathroughitsantiangiogenesiseffectbyinhibitionofVEGF.
简介:背景与目的:原发性椎管内淋巴瘤十分罕见,本研究旨在总结原发椎管内淋巴瘤的临床特点,影像学特征及治疗手段,以提高对此病的认识。方法:对北京天坛院神经外科三病房2000年1月至2006年12月间收治的6例经病理证实为椎管内恶性淋巴瘤的患者进行回顾性分析,并文献复习。结果56例患者中,男性4例,女性2例,中位年龄38.5岁。4例患者首发症状为疼痛,平均病程10.9个月。所有患者术前均行MRI检查.肿瘤位于颈段4例,胸段1例,骶段1例。本组患者均采取显微手术治疗,术中辅以电生理监测,肉眼全切1例,近全切除4例,大部分切除1例,无手术死亡。术后4例症状缓解,出院后全部患者均行放射治疗.效果满意。结论:原发性椎管内淋巴瘤是椎管内的罕见肿瘤,缺乏特异性的影像学表现。椎板切除减压,肿瘤切除.术后辅以局部放疗和全身化疗是其主要治疗手段.预后较好。
简介:Objective:Tostudytheroleofconnexingene(Cx43)onthedevelopmentofgliomaandthefeasibilityofusingCx43cDNAasatargetofgenetherapyofgliomas.Methods:ParentalratC6cellsandC6cellstransfectedwithCx43cDNAwereimplantedintorightcaudatenucleusofSDratsascontrolandtransfectedgroup.RatsbearingcerebralC6gliomasweretreatedwithCx43cDNAandemptyvectorastreatedgroupandemptyvectorgroup.Thegeneralmanifestation,survivaltime,MRIdynamicscanningandhistopathologicalchangesofallratswereobserved.Insituhybridizationandimmunohisto-chemistrywereusedforexaminationofCx43mRNAanditsproteiningliomas.AveragenumberofAgNORstainingwasusedfordetectionofcellproliferationactivity,andTUNELmethodfordeterminationofcellapoptosis.Results:Allratsincontrolandemptyvectorgroupdiedofcerebralgliomaswithin3weeksafterimplantationofC6cells.Sixoutofnineratsinthetransfectedgroupandeightoutoftenratsintreatedgroupkeptalivebeyond120dayswithtotallydisappearingofthetumorfoci,exceptonetreatedrathavingalittleresidueoftumor.IngliomasoftransfectedandtreatedgroupsCx43geneexpressionwasupregulated,proliferationactivitywaslowered,However,theapoptoticcellsdidnotincrease.Conclusion:ThepresentstudyindicatesthatCx43geneisofcrucialimportanceinthedevelopmentofmalignantglioma.Itcanbeaneffectivetargetforgenetherapyofgliomas.
简介:目的:观察脐带血树突状细胞对小鼠S-180细胞株移植瘤的作用.方法:采用脐带血来源的单核细胞制备树突状细胞,体外经S-180细胞肿瘤相关抗原(TAA)致敏后免疫小鼠,一周后接种S-180细胞株.或先制备荷瘤小鼠模型,一周后再接种致敏树突状细胞.结果:脐带血来源的树突状细胞经胃癌细胞系S-180的TAA致敏后既能明显保护小鼠该移植瘤的发生,又能抑制已发生移植瘤的生长.同对照组相比,预防组和治疗组的瘤体积明显缩小,细胞免疫功能趋于正常,生存期延长(P<0.05).结论:脐带血树突状细胞对小鼠S-180移植瘤的发生有预防作用,对荷瘤小鼠移植瘤的生长有抑制作用,为树突状细胞的临床应用提供了进一步的依据.
简介:Objective:Toinvestigatetheimmunotherapyefficacyoffusioncells(dendritic-C6anti-TGF-β1cells)inthetreatmentofintracranialgliomas.Methods:Dendriticcellswereisolatedfromratbone-marrowprecursorsstimulatedinvitrowithgranulocyte-macrophagecolony-stimulatingfactor(GM-CSF)andInterleukin-4(IL-4).C6anti-TGF-β1cellsoriginallyfromC6celllineofaratglioblastomaweretransfectedwithplasmidofTGF-β1anti-sensegene.FusionsofdendriticcellsandC6anti-TGF-β1cellswerepreparedbypolyethyleneglycol(PEG).TheDC/C6anti-TGF-β1fusioncellswereobservedandconfirmedbylightmicroscopyandscanningelectronmicroscopy.Experimentalratsweredividedintothreegroupsatrandom:C6cells(I),dendritic-C6anti-TGF-β1fusioncellsandC6cells(II)andIMDMmediumonly(III).Thecellswereinjectedintorightparietalloberegionoftheratwithstereotaxictechnique.Histology,tumornecrosisandsurvivaltimewereevaluated.Results:ComparedwiththeratsthatreceivedC6cells(survivalmediantimewaslessthan20days,tumorregionwasseeninallfieldsofobserved),theratsinjectedwithdendritic-C6anti-TGF-β1fusioncellsandC6cellsgotamoreprolongedlifespan(morethan59days),aswellaslesstumorregion(5.01%-6.2%).Therewasnotumornecrosis,butsomegliaswereseeninsurroundings.Allratsweresurvivedandnonecrosiswasobservedinnegativecontrolgroup.StatisticalanalysisshowedthatgroupIIhadsignificantdifferencecomparedwithgroupI.Conclusions:Dendritic-C6anti-TGF-β1fusioncellscouldprolongthelifespanofrats,providingastrategytoachieveanantitumorresponseagainsttumorsinthecentralnervoussystem.
简介:客观:为了与M-CSFR验证MAF-J6-1受体的抗原协会并且进一步学习M-CSF和它的受体的角色,调停了在支持白血病的房间增长的juxtacrine。方法:MAF-J6-1RRE2的Monoclonal抗体(McAb)和rhM-CSFR的polyclonal抗体(PolyAb)被准备。到M-CSFR的McAbRE2的特性被ELISA被间接ELISA,有J6-1房间殖民地形成的跨neutralizing试金和中立化测试证实。结果:到M-CSFR的净化的RE2的反应活动是超过1:16000。M-CSFR和MAF-J6-1R的禁止的活动能被RE2和anti-M-CSFR抗体堵住。到M-CSFR的RE2的反应能被M-CSFR减少。结论:到M-CSFR的RE2的特性被证实,有M-CSFR的MAF-J6-1R的抗原协会被证明。它建议M-CSF和它的受体调停了auto-juxtacrine刺激能是在白血病或nonhematological恶意的起作用的机制。