简介:Objective:TostudytheeffectofantisenseVEGFRNAonratC6gliomasinvivoandfindoutthefeasibilityofantiangiogenesistherapywithantisenseVEGFRNAformalignantgliomas.Methods:ParentalratC6gliomacellsandC6cellstransfectedwithantisenseVEGFcDNAwereimplantedintracerebrallyandsubcutaneouslyintoSDratsascontrolandtransfectedgroup.RatsbearingcerebralandsubcutaneousC6gliomasweretreatedwithantisenseVEGFcDNAastreatedgroupandsenseVEGFcDNAandemptyvectorascontroloftreatedgroup.Thegeneralmanifestation,survivaltime,MRIandhistopathologicalchangesofallratswereobserved.Thevolumeofsubcutaneouslyimplantedtumorswasdeterminedregularly.InsituhybridizationandimmunohistochemicalstainingwereusedfordetectionofVEGFgeneexpressionofgliomaswhilePCNAimmunostainingandTUNELmethodforexaminationofproliferationactivityandapoptosisofgliomas,respectively.Results:Thesurvivaloftheratsintransfectedandtreatedgroupwasprolonged.Thereweretworatssurvivingover90dinthetreatedgroupandtheirtumorsdisappeared.TheVEGFgeneexpression,thenumberofmicrovesselsandtheproliferationactivityweredecreasedandalargeamountofapoptoticcellscouldbefoundincerebralandsubcutaneousgliomasintreatedandtransfectedgroups.Conclusion:VEGFisoneofthecandidategenesforgenetherapyofmalignantgliomas.AntisenseVEGFRNAcombinedwithothertherapiesshouldbestudiedfurtherforenhancingthetherapeuticeffectofmalignantgliomas.
简介:Objective:ThepresentstudyaimedtoinvestigatecircularRNA(circRNA)expressioninuvealmelanoma(UM).Methods:First,weusedmicroarraytocomparetheexpressionprofilesofcircRNAinfiveUMsamplesandfivenormaluveatissues.Next,bioinformaticsanalyses,includinggeneontology(GO)analysisandpathwayanalysis,wereappliedtostudythesedifferentiallyexpressedcircRNAstopredictpathogenicpathwaysthatmaybeinvolved.Quantitativereal-timepolymerasechainreaction(qRT-PCR)in20UMsamplesand20normaluveasampleswasusedtoconfirmthecircRNAexpressionprofilesobtainedfromthemicroarraydata.Finally,weanalyzedtheinteractionbetweenvalidatedcircRNAsandtheirpotentialcancer-associatedmiRNAtargets.Results:Intotal,50,579circRNAs[foldchange(FC)≥2.0;P<0.05],including20,654up-regulatedand29,925down-regulatedcircRNAs,wereidentifiedasdifferentiallyexpressedbetweenUMtissuesandnormaluveatissues.WeusedqRT-PCRtoverifysevendysregulatedcircRNAsindicatedbythemicroarraydata,includinghsacirc0119873,hsacirc0128533,hsacirc0047924,hsacirc0103232,hsa-circRNA10628-6,hsacirc0032148andhsacirc0133460,whichmaybepromisingcandidatestostudyfuturemolecularmechanisms.Conclusions:Thisstudyexplored,forthefirsttime,theabnormalexpressionofcircRNAsinUManddescribedtheexpressionprofileofcircRNAs,providinganewpotentialtargetforthemechanismofUMandfuturetreatmentofUM.
简介:Longnon-codingRNAs(lncRNAs)refertoagroupofRNAsthatareusuallymorethan200nucleotidesandarenotinvolvedinproteingeneration.Instead,lncRNAsareinvolvedindifferentregulatoryprocesses,suchasregulationofgeneexpression.DifferentlncRNAsexistthroughoutthegenome.LncRNAsarealsoknownfortheirrolesindifferenthumandiseasessuchascancer.HOTAIRisanlncRNAthatplaysaroleasanoncogenicmoleculeindifferentcancercells,suchasbreast,gastric,colorectal,andcervicalcancercells.Therefore,HOTAIRexpressionlevelisapotentialbiomarkerfordiagnosticandtherapeuticpurposesinseveralcancers.ThisRNAtakespartinepigeneticregulationofgenesandplaysanimportantroleindifferentcellularpathwaysbyinteractingwithPolycombRepressiveComplex2(PRC2).Inthisreview,wedescribethemolecularfunctionandregulationofHOTAIRanditsroleindifferenttypesofcancers.
简介:客观干扰素(IFN)和ribavirin(RBV)的联合是为丙肝的标准治疗病毒(HCV)感染。HCV遗传型2a对治疗证明了更顺从,但是它的功效是还有限的。这研究试图在HCV遗传型2a感染的一种情况中调查差的反应的机制。方法:我们从一个病人分析了HCVRNA的动态变化,与HCV遗传型2a感染了,显示出差的virological回答到是的IFN/RBV判定了12在由HCV的治疗的开始以后的星期克隆定序。然后,我们构造了subgenomic日语有人性化的Gaussia的暴发性的hepatitis-1(JFH1)replicon和不同妄想的replicons酶基因。妄想的replicons从subgenomicJFH1replicon,NS5A区域被病人顺序从pre/posttreatment在代替被导出,并且到IFN的妄想的replicons危险性被相对Gausia酶活动评估。预告的处理HCV定序的结果显得几乎一致,并且quasispecies变化是进一步的在12星期治疗以后简化的更多。而且,quasispecies变化似乎相对,在NS5A更多样化为IFN反应关键的一个区域,和每妄想的replicons展出了不同反应到IFN。结论在长期的感染的功课期间,HCV人口似乎被使适应病人免疫学的系统,并且推进被IFN/RBV治疗的联合选择,显示quasispecies可以完全与IFN的与那些不同的目标由另外的药的增加消除了。另外,到IFN的妄想的replicon的各不同的反应与氨基酸变化在或在在长期的感染和IFN/RBV治疗期间决定NS5A的区域(ISDR)的IFN敏感附近有关是最可能的。
简介:环状RNA(circularRNAs,circRNAs)是一种新型的内源性非编码RNA,与其他线性RNA不同,它形成共价闭合连续的环形结构,在真核生物的转录组中占有很大的比例。这些circRNAs主要来源于内含子或者外显子,通过反向拼接或套索内含子方式产生。近来研究发现,circRNAs在细胞质中富集,具有保守性和相对稳定性,这些特性赋予了circRNAs许多潜在的功能,例如充当微小RNA(miRNA)海绵,结合RNA相关的蛋白质,形成RNA蛋白复合体从而调节基因的转录。有证据表明circRNAs在消化道肿瘤中可能发挥重要的作用并且能够作为某些疾病的诊断性或预测性生物标记物。本文结合国内外的最新研究报道,对circRNAs在消化道肿瘤中的研究进展作一综述,以期为消化系统肿瘤预测、诊断和治疗提供新的思路。
简介:目的:探讨转录水平基因沉默(TGS)技术和转录后水平基因沉默(PTGS)技术对肝素酶(HPA)基因干扰效果及其对肝癌SMCC-7721细胞侵袭能力的影响。方法从HPA基因启动子区和编码区分别设计并合成TGS和PTGS的小干扰RNA(siRNA),并转染肝癌细胞SMMC-7721;实时半定量PCR和Westernblotting检测TGS和PTGSsiRNA转染后48、72和96hHPA的表达,并设空白组作为对照;Transwell小室实验检测干扰后SMMC-7721细胞的侵袭能力。结果TGS和PTGS两种技术在转染48h后,从mRNA和蛋白水平上均能成功干扰HPA表达;转染后72h,PTGS组HPA恢复表达,而TGS组仍保持沉默;转染后96h,两组HPA均恢复表达。Transwell小室实验表明,TGS和PTGS组HPA基因均能使SMCC-7721的穿膜细胞数减少,TGS组效果更明显。结论TGS技术沉默肝癌SMMC-7721细胞中HPA基因的能力优于PTGS技术,并使肝癌细胞的侵袭能力显著降低。
简介:目的探讨微小RNA-3960(miR-3960)在结肠癌组织中的表达情况及其临床意义。方法收集2014年1月至2016年12月经手术切除的结肠癌组织及对应癌旁组织40例,采用实时荧光定量PCR(QPCR)检测miR-3960的表达水平,分析miR-3960表达与结肠癌临床病理特征(性别、年龄、肿瘤大小、分化程度、浸润程度、淋巴结转移和TNM分期)的关系。结果结肠癌组织中miR-3960的表达水平为0.462±0.291,低于癌旁组织的0.981±0.531,差异有统计学意义(P〈0.01);miR-3960表达与结肠癌的分化程度、浸润深度、淋巴结转移和TNM分期有关(均P〈0.05),但与性别、年龄和肿瘤大小无关(P〉0.05)。结论miR-3960在结肠癌组织中表达下调,且与TNM分期、浸润深度、分化程度和淋巴结转移有关,可能与结肠癌的发生、发展有一定关系。