简介:随着影像医学的发展,CT和MRI已经成为当前脑肿瘤最主要的影像学检查方法。但常规的形态学诊断方法已经不能满足临床需要。磁共振波谱成像(magneticresonancespectroscopy,MRS)、弥散加权成像(diffusion—weightedimaging,DWI)、弥散张量成像(diffusiontensorimaging,DTI)、弥散张量纤维束成像(diffusiontensortractography,DTT)、CT灌注成像(CTperfusion)和磁共振灌注加权成像(perfusion—weightedimaging,PWI)和血氧水平依赖效应功能磁共振成像(bloodoxygenleveldependent—functionalMRI,BOLD—fMRI)等新技术的出现为临床医师提供了脑肿瘤的功能信息,为常规CT和MRI检查方法提供了重要的补充。
简介:TheroleofthetranscriptionfactorNF-κBinshapingthecancermicroenvironmentisbecomingincreasinglyclear.InflammationalterstheactivityofenzymesthatmodulateNF-κBfunction,andcausesextensivechangesingenomicchromatinthatultimatelydrasticallyaltercell-specificgeneexpression.NF-κBregulatestheexpressionofcytokinesandadhesionfactorsthatcontrolinteractionsamongadjacentcells.Assuch,NF-κBfinetunestissuecellularcomposition,aswellastissues'interactionswiththeimmunesystem.Therefore,NF-κBchangesthecellresponsetohormonesandtocontactwithneighboringcells.ActivatingNF-κBconferstranscriptionalandphenotypicplasticitytoacellandtherebyenablesprofoundlocalchangesintissuefunctionandcomposition.ResearchsuggeststhattheregulationofNF-κBtargetgenesisspecificallyalteredincancer.SuchalterationsoccurnotonlyduetomutationsofNF-κBregulatoryproteins,butalsobecauseofchangesintheactivityofspecificproteostaticmodulesandmetabolicpathways.ThisarticledescribesthemolecularmodeofNF-κBregulationwithafewcharacteristicexamplesoftargetgenes.
简介:目的:筛选LuminalB型局部晚期乳腺癌新辅助化疗疗效预测基因。方法收集10例LuminalB型乳腺癌患者,均行DA方案新辅助化疗(多西他赛75mg/m2静滴,d1;表阿霉素80mg/m2静滴d1,21天为1周期,共4个周期),根据化疗疗效分为完全病理缓解(pCR)组(n=3)和非完全病理缓解(npCR)组(n=7)。采用人基因表达谱cDNA芯片从10例乳腺癌患者中筛选新辅助化疗疗效相关基因,荧光定量PCR验证差异表达基因。结果pCR组与npCR组癌组织相比,上调基因231个,下调基因195个;pCR组癌组织与癌旁组织相比,上调的基因357个,下调的基因544个;npCR组癌组织与癌旁组织相比,上调基因143个,下调基因101个;pCR组与npCR组癌旁组织比较,上调基因98个,下调基因67个。pCR组与npCR组癌组织比较,筛选出6个与肿瘤有关的基因,其中上调基因为CYP4Z1、FGFL6、BCAR4,下调基因为FABP4、S100B、ALPH1L1。荧光定量PCR进一步验证显示,两组mRNA表达差异的基因为CYP4Z1和BCAR4,pCR组两种基因表达均显著低于npCR组(P<0.05)。结论对局部晚期LuminalB型乳腺癌低表达BCAR4和CYP4Z1的患者新辅助治疗选择采用DA方案化疗更有可能获得pCR。
简介:Objective:Fusogenicendogenousretroviralsyncytinplaysanimportantroleintheformationofsyncytiotrophoblastsinhumanplacenta.Apartfromitsexpressioninplacenta,brainandtestis,syncytinhasalsobeenfoundinmanycancers.Althoughsyncytinhasbeenproposedtoserveasapositiveprognosticmarkerinsomecancers,theunderlyingmechanismisunclear.Theaimofthisstudyistoevaluatetheeffectsofsyncytinexpressionontheinvasivephenotypeofmelanomacells.Methods:Theeukaryoticexpressionplasmidforsyncytin-EGFPwasconstructedandtransfectedintoB16F10melanomacells.TheeffectofsyncytinontheinvasionpotentialoftumorcellswasevaluatedinB16F10sublinecellsthatstablyexpressedsyncytin-EGFPfusionproteinorEGFPalone.Results:TheB16F10sublinesthatstablyexpressedsyncytin-EGFPorEGFPalonewereestablishedrespectivelyandconfirmedbyimmunofluorescentandimmunoblottingassay.SyncytinexpressioninB16F10cellswasassociatedwithdecreasedcellproliferation,migrationandinvasion.Multinucleatedgiantcellsthatcontainedasmanyasfivenucleiwereinducedinsyncytin-expressingcells.Inaddition,syncytinexpressiondidnotalterthesensitivityofB16F10cellstotrichosanthin,atoxinthatdamagessyncytiotrophoblastsmoreefficientlythanothertissues.Conclusions:Theseresultssuggestthatsyncytinexpressioninsomecancersmayconfinetheirinvasionpotentialandthusserveasapositiveprognosticfactor.更多还原
简介:Objective:Tostudythevaccinepotencyofgene-modifiedtumorcells.Methods:TheEL-4lymphomawastransducedwithrecombinantretroviruscontainingthemurineGM-CSFgeneorB7-1gene.Theeffectofgenetransductiononantitumorimmunitywasinvestigated.Results:Flowcytometryanalysisshowedthatexpressionoftheirsurfacemarkerbetweenwild-typeEL-4cellsandgenetransducedtumorcellswasthesameexceptforCD80positiveinB7-1genetransducedcells.GM-CSFgeneorB7-1genetransducedEL-4cellsresultedinremarkablelossoftumorigenicityinsyngeneticmice.ThesystemicprotectiveimmunitywasinducedagainstthechallengewithEL-4/wtcells.TherapeuticvaccinewithEL-4/GM-CSForEL/7-1cellscouldretardthegrowthofestablishedearly-stageEL-4/wttumorsignificantly,butnotretardthegrowthoflate-stageEL-4/wttumor.IrradiatedGM-CSFgenetransducedEL-4cellsshowedstrongvaccineeffectagainstEL-4cellchallenge,butirradiatedB7-1genetransducedEL-4cellsshowedweakvaccineeffect.RemarkablecooperativeantitumoreffectagainstEL-4cellchallengewasobservedwhenbothirradiatedEL-4/GM-CSFandEL-4/B7-1wereinoculatedtogether.Conclusion:GM-CSFgeneorB7-1genetransducedcombinationofthetwokindsofvaccinemayhavepotentialapplicationvalueinhumancancertreatment.
简介:Objective:DiffuseLargeBCellLymphoma(DLBCL)isaheterogeneousgroupoftumorswithdifferentbiologicalandclinicalcharacteristicsthathavediverseclinicaloutcomesandresponsetotherapy.Stromal-1signatureoftumormicroenvironmentofDLBCLrepresentsextracellularmatrixdepositionandhistiocyticinfiltrate,whereasstromal-2representsangiogenesisthatcouldaffecttumorprogression.Methods:Theaimofthepresentstudyistoassessthesignificanceofstromal-1signatureusingSPARC-1andstromal-2signatureusingCD31expressionandthenfinallytoconstructbiologicprognosticmodel(BPM)in60casesofDLBCLviaimmunohistochemistry.Results:Microvesseldensity(P<0.05)andSPARCpercentageofexpression(P<0.001)werehigherinDLBCL,includinggerminalandnongerminalcases,comparedwithreactivefollicularhyperplasia.Highmicrovesseldensitywassignificantlyassociatedwithsplenicinvolvement(P=0.008),highmitoticcount(P=0.045),andpresenceofcapsularinvasion(P=0.035).PercentageofSPARCexpressionwassignificantlyassociatedwithsplenicinvolvement(P=0.03).ConstructingBPMshowedthat42cases(70%)wereoflowbiologicscore(0–1)and18cases(30%)wereofhighbiologicscore(2–3).LowBPMcasesshowedlessprobabilityforsplenicinvolvement(P=0.04)andahigherrateofcompleteresponsetotherapycomparedwithhighscorecases(P=0.08).Conclusions:TheDLBCLmicroenvironmentcouldmodulatetumorprogressionbehaviorsinceangiogenesisandSPARCpositivestromalcellspromotedisseminationbyassociationwithspleeninvolvementandcapsularinvasion.Biologicprognosticmodels,includingmodifiedBPM,whichconsideredcelloriginofDLBCLandstromalsignaturepathways,coulddetermineDLBCLprogressionandresponsetotherapy.
简介:调查recombinantcalreticulin(rCRT)的目的调停了antitumor免疫者反应。方法房间增长被MTT方法决定,apoptosis被DNA破碎和CRT表示评估,房间本地化是由西方的弄污,QT-RT-PCR和immunofluorescence的assayed试金。老鼠黑瘤房间线B16-F1与polyamine类似物后房被对待导致apoptosis并且与rCRT孵化了得到在膜,然后房间上涂的rCRT作为房间抗原习惯于有免疫力的BALB/c老鼠。使免疫的动物被实时B16-F1房间然后肿瘤产生比率重新质问,lactate脱氢酶版本试金被用来评估调停rCRT的免疫的antitumor效果。没有CRT的再分配,结果后房在房间以内导致了B16-F1房间的apoptosis。当与rCRT涂的B16-F1细胞被用作房间抗原接种动物时,老鼠在在vivo禁止相应肿瘤细胞的增长获得了能力。与积极控制组,作比较从那些的splenocytes接种老鼠对B16-F1房间明确地在他们的cytolytic效果上有明显的改进。在房间表面上涂的结论rCRT能提高apoptotic肿瘤的immunogenicity在老鼠的房间和调停的有效反肿瘤immunoresponse。
简介:核内不均一核糖核蛋白A2/B1(hnRNPA2/B1)是核不均一核糖核蛋白家族的成员,其在细胞生命活动中起着非常重要的作用,主要参与pre-mRNA的可变剪接和转录调控、端粒维持及细胞增殖、迁移过程,在很多肿瘤中呈高表达的状态。本文就hnRNPA2/B1在肿瘤中的作用与机制及其所涉及的其他功能作一综述。
简介:目的:探讨CUL4B在结直肠癌组织中表达及其与患者临床病理参数和预后的关系。方法选取2010年1月至2010年12月间在本科收治的102例结肠癌患者临床资料,应用免疫组化法检测102例结直肠癌组织中CUL4B蛋白表达情况,分析CUL4B蛋白表达与结直肠癌临床病理参数及预后的关系。结果CUL4B蛋白在结直肠癌组织中阳性表达率为55.88%(57/102),CUL4B蛋白阳性表达与淋巴结转移(P=0.010)、肿瘤远处转移(P=0.009)、pTNM分期(P=0.001)、Duke's分期(P=0.002)、肝转移(P=0.015)和腹膜转移(P=0.025)有明显相关性。CUL4B在结直肠癌组织中的阳性表达提示患者预后较差(P<0.001)。COX多因素回归分析结果表明淋巴结转移(P<0.001)、血管侵犯(P=0.038)和CUL4B高表达(P<0.001)是判断结直肠癌患者预后的独立危险因素。结论CUL4B蛋白阳性表达可作为结直肠癌患者预后不佳的评价指标之一。
简介:Objective:Toexploretheeffectsofdexamethasone(DXM)andvincristine(VCR)oncytosinearabinoside(Ara-C)inducedapoptosisandactivationofnuclearfactor-κ-genebinding(NF-κB)inleukemiccelllineHL60-n.Methods:ApoptosisofHL60-ncellswasanalysedbyTdT-mediatedX-dUTPnickandendlabeling(TUNEL)andDNAelectrophoresis.NF-κBactivityofHL60-ncellswasdetectedbyelectrophoreticmobilityshiftassay(EMSA).Results:TherewasslightactivationofNF-κBinHL60-ncellswithoutdruginduction.Ara-Cat1μmol/LsignificantlyenhancedtheactivationofNF-κBinHL60-ncells.ThelevelofNF-κBactivationinducedbyDXMat1μmol/LorVCRat0.1μmol/Lhadnosignificantdifferencecomparedwiththatofthecontrolgroup.However,inHL60-ncellspre-treatedwith1μmol/LofDXMor0.1μmol/LofVCR,theactivationofNF-κBinducedby1μmol/LofAra-Cwassignificantlysuppressedwithinhibitionratesof31.0%and47.0%,respectively.TheapoptosisratesofHL60-ncellsinducedby1.0μmol/L,10μmol/Land100μmot/LAra-Cwere45.00±3.16%,61.88±3.40%and77.62±4.75%,respectively.TheapoptoticratesofHL60-ncellsinducedbyDXMat1μmol/LorVCRat0.1μmol/Lweresimilartothatofthecontrolgroup.However,eitherDXMat1μmol/LorVCRat0.lμmol/LcouldenhancetheapoptosisofHL60-ncellsinducedbyAra-Cat1μmol/Lwithratesof39.1%and59.2%,respectively.Conclusion:Ara-CcaninduceapoptosisandactivationofNF-κBinHL60-ncells.ThemechanismofincreasedapoptosisofHL60-ncellsbyDXMorVCRmayberelatedtosuppressionofNF-κBactivation.
简介:目的检测弥漫大B细胞淋巴瘤(DLBCL)患者外周血血浆中06.甲基鸟嘌呤.DNA甲基转移酶(O6-methylgua-nine-DNAmethyltransferase,MGMT)基因的甲基化状态,探讨MGMT基因甲基化与含烷化剂方案治疗DLBCL疗效的关系。方法利用巢式甲基化特异性聚合酶链反应法检测CHOP方案治疗前后DLBCL患者外周血血浆MGMT基因的甲基化状态。结果30例DLBCL患者血浆MGMT基因甲基化率为63.3%(19/30),血浆MGMT基因甲基化者化疗有效率为100.O%(19/19),非甲基化者化疗有效率为72.7%(8/11),两组化疗有效率差异有统计学意义(P=0.041)。血浆MGMT基因甲基化者化疗后耐药发生率为10.5%(2/19),非甲基化者耐药发生率为54.5%(6/11),两组化疗耐药率差异有统计学意义(P=0.028)。结论外周血血浆中MGMT基因甲基化可能是预示DLBCL使用含烷化剂方案化疗疗效和耐药的指标。
简介:目的:研究共刺激分子B7-H1和抑癌基因PTEN在人结肠癌组织中的表达及意义,并探讨B7-H1和PTEN的相互关系。方法:运用免疫组织化学SP法检测46例结肠癌组织、20例腺瘤性息肉组织、28例慢性炎症组织中B7-H1和PTEN的表达情况,并对其表达水平与结肠癌临床病理参数之间的关系进行相关性分析。结果:B7-H1分子在结肠癌组织、腺瘤性息肉及慢性炎症组织中的表达率分别为82.6%(38/46)、20.0%(4/20)、21.4%(6/28)。其阳性表达与患者年龄、性别、癌症分化程度、淋巴结转移及浸润深度未见相关(P〉0.05)。PTEN分子在结肠癌组织中、腺瘤性息肉及慢性炎症组织中的表达率分别为54.3%(25/46)、75.0%(15/20)、78.6%(22/28),其阳性表达与患者年龄、性别、淋巴结转移及浸润深度无关(P〉0.05),而与癌症的分化程度相关(P〈0.05)。B7-H1和PTEN在结肠癌组织中的表达未见负相关性,但临床数据提示二者的表达率呈相反趋势。结论:B7-H1高表达、PTEN低表达在结肠癌发生发展中起重要的作用,他们可作为抗肿瘤治疗的有效新靶点。
简介:目的:探讨骨髓涂片、骨髓活检对弥漫性大B细胞淋巴瘤(DLBCL)临床分期的价值。方法:对44例累及骨髓的病例回顾性分析骨髓涂片及骨髓活检切片,分别比较细胞学形态、组织形态、增生程度、纤维组织增生程度、检出率和敏感性。结果:骨髓涂片中可见中到大型的异型细胞骨髓,切片中瘤细胞以灶型最常见。按Manoharm改良法评估,骨髓切片中网状纤维含量有不同程度增多。骨髓涂片与骨髓切片增生程度的比较,差异有统计学意义(P〈0.05),切片组增生程度高于涂片组。骨髓涂片与骨髓切片检出率的比较,差异有统计学意义(P〈0.05),切片组检出率高于涂片组。骨髓涂片与骨髓切片敏感性的比较,差异有显著统计学意义(P〈0.01),切片组敏感性明显高于涂片组。结论:骨髓涂片简单易行,骨髓切片在骨髓组织状况、优势增生细胞等方面有优势,同时开展涂片和切片的检测,提高检出率,可以修正临床分期,如能同时进行流式细胞免疫表型分析,则更能提高检出率。
简介:目的:探讨原发性胃弥漫大B细胞淋巴瘤(primarygastricdiffuselargeB-celllymphoma,PG-DLBCL)的预后影响因素。方法回顾性分析56例PG-DLBCL患者的临床资料及随访数据,采用Kaplan-Meier法估算患者的生存时间,采用Cox比例风险模型进行预后影响因素分析。结果56例PG-DLBCL患者的1年、2年、3年无事件生存率分别为73.2%,71.3%,68.8%,平均无事件生存时间(event-freesurvival,EFS)为69个月;1年、2年、3年总生存率分别为81.8%,73.3%,70.5%,平均总生存时间(overallsurvival,OS)为72个月。化疗联合放疗组的平均EFS比单纯化疗组长,差异有统计学意义(P﹦0.039);不同的Musshoff分期、LDH水平、淋巴瘤国际预后指数(internationalprognosticindex,IPI)评分、β2微球蛋白值、美国东部肿瘤协作组(EasternCooperativeOn-cologyGroup,ECOG)体能状态(performancestatus,PS)评分、有无巨块对EFS及OS均有明确的影响(P<0.05)。影响EFS及OS的独立预后因素为LDH水平及ECOG评分。结论对PG-DLBCL患者推荐采取以化疗为主的非手术治疗,LDH升高及PS评分高是预后不良的重要指标。
简介:背景与目的:MicroRNA(miRNA)参与肿瘤发生发展的诸多过程,并参与调节多种抗肿瘤药物的敏感性。本研究探讨恶性胶质瘤中miR-181b对VM-26(teniposide)化疗敏感性的影响。方法:以荧光定量PCR法检测miR-181b在高级别胶质瘤中的表达.并利用CCK-8细胞毒性实验检测高级别胶质瘤患者细胞对VM-26的化疗敏感性:并通过慢病毒感染构建稳定高表达miR-181b的U87/181b细胞及其对照组U87/nc.在荧光显微镜下观察其转染率及荧光定量PCR法检测其中miR-181b的表达:进而利用CCK-8细胞毒性实验检测U87/181b和U87/nc细胞对VM-26的敏感性.利用流式细胞仪检测VM-26作用72小时后U87/181b和U87/nc的凋亡情况。结果:在高级别胶质瘤中,miR-181b的表达与VM-26的敏感性呈正相关(r=-0.691。P〈0.01).也就是miR一18lb高表达肿瘤对VM-26的敏感性高。qPCR检测miR-181b在U87/18lb(0.699±0.023)的表达显著高于U87/nc(0.019±0.001)(P〈0.05)。CCK-8检测结果显示U87/181b[IC50:(1.25±0.12)μg/mL]对VM-26的敏感性显著高于U87/nc[IC50:(6.24±0.88)μg/mL]P〈0.05)。经VM-26处理后U87/181b凋亡率(69.41±0.77)明显高于U87/nc(37.93_+2.90)(P〈0.05)。结论:在高级别胶质瘤高表达miR-18lb的肿瘤对VM-26的敏感性高:在胶质瘤细胞U87中增加miR-18lb表达可以提高对VM-26的敏感性.
简介:Objective:TheresultsofapreviousstudyshowedthatacleardysregulationwasevidentintheglobalgeneexpressionoftheBCL11A-suppressedB-lymphomacells.Inthisstudy,thebonemorphogeneticproteinreceptor,typeII(BMPR2),E1Abindingproteinp300(EP300),transforminggrowthfactor-β2(TGFβ2),andtumornecrosisfactor,andalpha-inducedprotein3(TNFAIP3)geneexpressionpatternsinB-cellmalignancieswerestudied.Methods:TherelativeexpressionlevelsofBMPR2,EP300,TGFβ2,andTNFAIP3mRNAinB-lymphomacelllines,myeloidcelllines,aswellasincellsfromhealthyvolunteers,weredeterminedbyreal-timequantitativereversetranscriptpolymerasechainreaction(qRT-PCR)withSYBRGreenDye.Glyceraldehyde-3-phosphatedehydrogenase(GAPDH)wasusedasreference.Results:TheexpressionlevelofTGFβ2mRNAinB-lymphomacelllineswassignificantlyhigherthanthoseinthecellsfromthehealthycontrol(P<0.05).However,theexpressionlevelofTNFAIP3mRNAinB-malignantcellswassignificantlylowerthanthatofthehealthycontrol(P<0.05).TheexpressionlevelsofBMPR2andEP300mRNAshowednosignificantdifferencebetweenB-malignantcelllinesandthehealthygroup(P>0.05).InB-lymphomacelllines,correlationanalysesrevealedthattheexpressionofBMPR2andTNFAIP3(r=0.882,P=0.04)hadsignificantpositiverelation.TheexpressionlevelsofBMPR2,EP300,andTNFAIP3mRNAincelllinesfrommyeloidleukemiaweresignificantlylowerthanthoseinthecellsfromthehealthycontrol(P<0.05).TheexpressionlevelsofTGFβ2mRNAshowednosignificantdifferencebetweenmyeloidleukemiacelllinesandthehealthycontrolorB-malignantcelllines(P>0.05).TheexpressionlevelsofBMPR2,EP300,andTNFAIP3mRNAinB-lymphomacellsweresignificantlyhigherthanthoseofthemyeloidleukemiacells(P<0.05).Conclusion:DifferentexpressionpatternsofBMPR2,EP300,TGFβ2,andTNFAIP3genesinB-lymphomacellsexist.更多还原
简介:目的探讨子宫内膜癌患者腹腔镜下子宫切除术对患者膀胱功能、排尿功能的影响.方法选取接受子宫切除手术的110例患者进行回顾性研究,根据手术方法不同将患者分为开腹组(n=58)、腹腔镜组(n=52),开腹组患者采用传统开腹手术治疗,腹腔镜组患者采用腹腔镜手术治疗,对比两组患者手术后的膀胱功能及排尿功能.结果术后1周,腹腔镜组患者的尿频及尿不尽、排尿等待的发生率分别为5.77%、7.69%,均低于开腹组的18.97%、24.14%(P﹤0.05);术后1个月,腹腔镜组患者的尿频及尿不尽、排尿等待的发生率分别为1.92%、1.92%,均低于开腹组的12.07%、12.07%(P﹤0.05);术后1个月,腹腔镜组患者的残余尿量、膀胱壁厚度均低于开腹组(P﹤0.05),最大尿流率、平均尿流率、最大逼尿肌压力、膀胱顺应性、排尿量测定值均大于开腹组(P﹤0.05).结论与传统开放手术相比,子宫内膜癌患者腹腔镜下子宫切除术对患者膀胱功能、排尿功能影响更小,泌尿系统并发症的发生率较低.