简介:目的探讨浆膜蛋白RTN1和RTN4基因在小鼠内耳的表达.方法采用5只成年小鼠内耳组织提取总RNA,逆转录后获得小鼠内耳细胞cDNA,根据RTN1和RTN4基因编码区序列设计的引物进行PCR扩增,通过PCR产物分析和DNA测序确定RTN1和RTN4是否在小鼠内耳细胞表达.结果采用小鼠内耳组织总RNA,RT-PCR扩增出RTN1和RTN4基因部分编码区,扩增产物测序证实小鼠内耳中有RTN1和RTN4基因的表达.结论RTN1和RTN4基因在内耳有表达,为RTN1和RTN4与连接蛋白26(connexin26)蛋白的互作关系提供了进一步的证据.浆膜蛋白RTN1和RTN4可能与连接蛋白26在听觉生理中起作用.
简介:目的进一步探讨bFGF-Math1基因在前庭上皮细胞系(UEC-4)细胞中的表达及生物学作用.方法利用阳离子脂质体LipofectamineTM2000介导bFGF-Math1基因真核表达质粒(pCI-bFGF-Math1)转染UEC-4细胞,利用RT-PCR技术检测基因在细胞中的表达,并利用免疫组织化学方法观察细胞的分化及特异性抗体的表达.结果脂质体介导的基因可在细胞内获得良好的表达,转染后24h,相差显微镜下观察细胞形态发生变化,免疫组织化学显示转染后细胞可以表达毛细胞特异性蛋白Myosin7a.结论bFGF-Math1基因有良好的生物学特性,可以有效地诱导支持细胞向毛细胞样细胞转变.
简介:摘要目的探讨MMP1和TIMP4在喉癌中的表达及其与肿瘤发生、侵袭和转移的相关性。方法应用实时荧光定量PCR对MMP1和TIMP4基因在20例喉癌及癌旁正常粘膜中mRNA水平进行定量检测,同时应用SP法检测其在50例喉癌及癌旁正常粘膜中蛋白水平的表达。结果MMP1mRNA喉癌组织中的表达0.548±0.274髙于癌旁组织0.215±0.181(P<0.05),TIMP4mRNA在喉癌组织中的表达0.478±0.24低于癌旁组织0.223±0.161(P<0.05);MMP1在喉癌组织和癌旁组织中的蛋白表达阳性率分别为84.0%和27.2%;TIMP4在其两组中的蛋白表达阳性率分别54.0%和86.36%;MMP1和TIMP4mRNA及蛋白表达与组织病理学分级、淋巴结转移相关(P<0.05),而与年龄无关(P>0.05);喉癌组织中MMP1和TIMP4mRNA及蛋白表达未检测到相关性(P>0.05)。结论MMP1和TIMP4表达与喉癌的发生、发展、浸润转移有关,它们有可能作为确定喉癌转移和预后的新生物学标记物。
简介:目的使用RNA-Seq技术分析Miif-m敲除鼠与野生鼠的血管纹转录组,研究Mitf-m基因敲除后的差异表达基因及相关改变的分子机制。方法分别取Miif-m敲除鼠(Mitfmi-△M/mi-△M;MM组)与野生鼠(Miif-m+/+;ww组)的血管纹进行总RNA提取;制备cDNA文库,用IlluminaHiSeq2000测序系统行高通量测序。利用软件Tophat2.2.0将cleanreads比对到参考基因组;分别用软件RSeQS-2.3.2和cufflinks来检测测序结果的均一性和基因表达水平。使用edgeR和DESeq程序筛选差异表达基因(differentialexpressedgenes,DEGs);选择下调DEGs,用KOBAS2.O进行基因本体(geneontology,GO)和京都基因与基因组百科全书(KyotoEncyclopediaofGenesandGenomes,KEGG)代谢途径的富集分析。结果MM组与WW组在参考基因组上mapping的cleanreads数分别为42463888和39718542,分别有88.7%和87.4%的reads是唯一映射,说明RNA-Seq结果可靠。DEGs筛查结果表明,相对于WW组,Mftf-m敲除鼠血管纹有45个DEGs,上调表达基因有7个,下调表达基因有38个。GO富集分析发现下调表达基因与黑色素的合成和代谢过程、色素沉着有关,值得关注的是与内向整流钾离子通道Kcnj10和Kcnj13相关。KEGG富集分析显示下调表达基因主要富集于黑色素生成通路。结论RNA-Seq分析拓展了Mftf-m基因调控网,为探究Mitf-m突变所致听力-色素综合征的分子机制及特异性研究Mitf不同转录子的功能奠定了基础。
简介:Managingmicrotiapatientsisalwaysachallenge.Multidisciplinaryapproach,goodfamilysupport,wellestablisheddoctorepatientrelationshipandwellorganisedpatient-supportgroupsaretheessentialelementsforsuccess.Withtheadvancementofimplantablehearingdevices,moreoptionswillbeavailableforthemicrotiapatients.Otologistsplayaleadingroleinthewholemanagementprocess.Theynotonlyprovideproperguidancetothepatientsinchoosingthecorrectpathofthetreatment,butalsoplayakeyroleinorganisingandmaintainingacosteffectivemultidisciplinaryrehabilitationteamforthemicrotiapatients.
简介:Applicationofsurgicalendoscope,usedaloneorincombinationwiththesurgicalmicroscope,fortheoperativemanagementofearandtemporalboneconditionsmayallowimprovedaccessandclearanceofdisease.Preservationofnormalstructuresmayalsobeimproved.Astheuseofthistoolisincreasing,theneedforbetterunderstandingoftheanatomyoftheearisbecomingevident.Thisisparticularlysoforendoscopicsurgeryaimingatremovaloflesionsinvolvingtheinfra-cochlearcorridorand/orpetrousapex.Humantemporalbone-derivedlabyrinthcasts(molds),originallymadeforendolymphaticductandsacanalysiswhichgenuinelyrepresentthemembranouslabyrinthanditsadjacentsofttissues,weremorphometricallyanalyzedintermsoftheanatomicrelationsbetweenstructuresinandaroundtheinfra-cochlearcorridor.Thedistancebetweenthepetrouscarotidartery(PCA)andthebasalturnofthecochlea,thedistancebetweenPCAandinfra-cochlearvein(ICV)/cochlearaqueduct(CA),andthedistancebetweenthelowersurfaceofbasalcochlearturnandthepointwherethecarotidarteryandjugularvein(JV)meetclosetothejugularforamen,weremeasuredtobearound1.3mm,6mmand8mmrespectively,thusconstitutinganapproximate68mm2infra-cochlearcorridor.Thisanalysisandfurtherstudywithlargersamplesmightbehelpfulforoperationviathiscorridorledtothepetrousapexwherecholesterolgranuloma,cholesteatomaandotherlesionsarenotuncommon.
简介:ObjectiveChronictinnitusisahighlyprevalentconditionandhasbeenhypothesizedtoresultfromaninnatedisturbanceincentralnervousserotonergictransmission.Giventhefrequentcomorbiditywithmajordepressionandanxiety,wearguethatcandidategenesforthesedisordersarelikelytooverlap.Thepresentstudyaddressesthegeneencodingforthe5-HT1Areceptorasaputativeriskfactorfortinnitus.MethodsIn88subjectswithadiagnosisofchronicsubjectivetinnituswhounderwentadetailedneurootologicalexamination,theentire5-HT1AgenewasamplifiedusingoverlappingPCRproducts.Ampliconswerecustomsequencedbidirectionallyandwerescreenedforvariantsinmultiplealignmentsagainstthehumangenomereference.ResultsWeidentifiedasynonymousC>Texchangeatresidue184(Pro)in7/88subjects,butdetectednomissensevariantsinthepopulationunderstudy.Specifically,thefollowingresidueswerefullyconserved:16(Pro),22(Gly),28(Ile),98(Val),220(Arg),267(Val),273(Gly),and418(Asn).DiscussionThepresentdatacountagainstthecausationofchronictinnitusbyachangeinthe5-HT1Areceptor'saminoacidsequence.However,theallelefrequencyforthe184Prominorallele(0.04)reachedtwicethefrequencyreportedincontrolcohortsfromthesameethnicity.Additionalinvestigationsareinvitedtoclarifytheroleofthe5-HT1Apolymorphisminlargersamples,andtocontrolforcomorbidaffectivedisorders.
简介:ObjectiveToconstructaprokaryoticexpressionvectorbearingfusiongeneNT4-ADNF-9forfuturestudiesongenetictherapiesforsensorineuraldeafness.MethodsDoublestrandADNF-9cDNAwassynthesizedusingasymmetricalprimer/templatesandligatedtothe3'terminalofsignalandleaderpeptidesofneurotrophin4(NT4).ThefusiongeneNT4-ADNF-9,wassubclonedintoprokaryoticexpressionvectorpBV220,andnamedpBV220/NT4-ADNF-9.DNAsequenceofthefusiongenewasanalyzed.ThefusionproteinwasisolatedbySDS-PAGEanditsbioactivitywasevaluatedusingprimarycultureofday8chickenembryonicDRGcells.ResultsThecorrectsequenceoffusiongeneNT4-ADNF-9wassuccessfullysubclonedintothepBV220vector.TheexpressedADNF-9proteinshoweditseffectsinpromotingcellsurvivalandneuritegrowth.ConclusionProkaryoticexpressionvectorpBV220/NT4-ADNF-9wasconstructedsuccessfullyandtheexpressedfusionproteindemonstratedsatisfactorybioactivity.
简介:目的构建含有人E2F2基因和绿色荧光蛋白基因(pEGFP)的腺病毒载体,为聋病的基因治疗奠定实验基础。方法根据已知的E2F2基因序列设计并合成相应的双链DNA,将其与酶切线性化的pDC315-EGFP载体片段连接,构建穿梭质粒pDC315-GFP-E2F2,并将其与腺病毒骨架质粒pBHGlox△E1,3Cre共转染HEK293细胞,同源重组产生重组腺病毒。对重组腺病毒进行扩增、纯化及滴度测定,用聚合酶链反应和测序方法验证穿梭质粒pDC315-GFP-E2F2穿梭质粒的构建;通过荧光显微镜和Westernblot(蛋白质印迹)方法,分别检测质粒pDC315-GFP-E2F2和重组腺病毒表达E2F2蛋白情况。结果经聚合酶链反应鉴定和测序分析,证实穿梭质粒pDC315-GFP-E2F2与设计一致;经荧光显微镜检测,分别由穿梭质粒pDC315-GFP-E2F2、重组腺病毒转染的HEK293细胞均可观察到GFP表达;经WesternBlot检测出在72kDa~95kDa处有条特征带,其大小和E2F2-GFP融合蛋白(~76kDa)相吻合;滴度测定为1×1011PFU/ml(PFU,plaqueformingunit,空斑形成单位)。结论成功构建了人E2F2基因重组腺病毒载体,并能在HEK293细胞中表达。
简介:1病例报道患者,男,44岁。因右面部肿块1个月于医院就诊,行CT检查发现右侧上颌窦肿块,于2015年9月4日入院。右侧面部颧骨下方可触及约4cm×4cm×3cm的略韧肿块,无压痛。鼻腔检查未见异常,颈部无异常。CT显示右侧上颔窦前壁大小约3cm×2cm×2cm肿块,内有钙化斑块(图1)。
简介:目的分析一个大前庭水管综合征家系的临床特征和SLC26A4基因检测特点。方法对一个大前庭水管综合征家系进行病史采集和听力学检测,绘制耳聋家系系谱图,提取受检者的基因组DNA,对所有家系成员进行耳聋基因芯片分析和SLC26A4基因全外显子及外显子侧翼序列的检测。结果该家系共5代合计30人(男17人,女13人),现存26人,其中第四代7人为耳聋患者,6人均为语前感音神经性聋。1人为语后感音神经性聋,颞骨CT显示均为前庭水管扩大,第五代1人为耳聋患者,表现为前庭水管扩大合并语前感音神经性聋。在家系中共发现SLC26A4基因c.754C〉T、c.919-2A〉G、c.1264-12T〉A和c.1548_1549insC四种已知致病突变类型。耳聋患者均为复合杂合突变。10人为SLC26A4基因携带者。结论该家系的8例耳聋患者由SLC26A4基因复合杂合突变导致前庭水管扩大,病因学分析可为患者提供预见性的临床措施,并为该家系的后代遗传咨询与婚育指导提供理论依据及科学手段,有效地防止聋儿后代出生。
简介:目的连接蛋白基因和遗传性耳聋及角皮病有明确的相关性.现有4个连接蛋白基因突变可导致角皮病,即:GJB4、GJB2、GJB3和GJB6,其中3个基因既可导致遗传性耳聋,即GJB2、GJB3和GJB6,而GJB4是否与遗传性耳聋相关还有待于进一步证实.为证实GJB4和遗传性耳聋的相关性,在非综合征型遗传性耳聋中进行突变检测.方法本实验采用PCR-直接测序法对60个非综合征型遗传性耳聋家系先证者进行GJB4的突变检测,其中32个显性遗传,28个隐性遗传.结果发现了四种碱基改变:109G>A、3'UTR+17A>G、611A>C和507C>G.109G>A和3'UTR+17A>G是新发现的碱基改变,但在家系突变检测中证实为多态.611A>C和507C>G两种碱基改变是已报道的多态,611A>C是我们检测到的最常见的多态.结论本研究发现了GJB4的109G>A和3'UTR+17A>G两种新多态,为今后进一步研究打下了基础,但未能最终证实GJB4为遗传性耳聋的致病基因,可是从该基因背景来分析GJB4仍可能是一个很好的耳聋候选基因,有待于扩大家系收集范围进一步检测.
简介:Recently,thehumancochleahasbeenshowntocontainnumerousresidentmacrophagesundersteady-state.Themacrophagesaccumulateinthestriavascularis,amongtheauditorynerves,andarealsospottedinthehumanorganofCorti.ThesemacrophagesmayprocessantigensreachingthecochleabyinvasionofpathogensandinsertionofCIelectrode.Thus,macrophagesexecuteaninnate,andpossiblyanadaptiveimmunity.Here,wedescribethemolecularmarkersCD4andCD8ofTcells,macrophagemarkersMHCⅡandCD11b,aswellasthemicroglialmarkersTEME119andP2Y12,inthehumancochlea.Immunohistochemistryandtheadvantageoussuper-resolutionstructuredilluminationmicroscopy(SR-SIM)wereusedinthestudy.CD4~+andCD8~+cellswerefoundinthehumancochleae.Theywereseeninthemodiolusinasubstantialnumberadjacenttothevessels,intheperipheralregionoftheRosenthal’scanal,andoccasionallyinthespiralligament.Whilethereareasurprisinglylargenumberofmacrophagesinthestriavascularisaswellasbetweentheauditoryneurons,CD4~+andCD8~+cellsarehardlyseenintheseareas,andneitherareseenintheorganofCorti.Inthemodiolus,macrophages,CD4~+andCD8~+cellsappearedofteninclusters.InteractionbetweenthesedifferentcellswaseasilyobservedwithSR-SIM,showingcloselyplacedcellbodies,andtheprocessesfrommacrophagesreachingoutandtouchingthelymphocytes.OtherwisetheCD4~+andCD8~+cellsinhumancochleartissuearediscretelyscattered.Thepossiblerolesoftheseimmunecellsarespeculated.
简介:目的比较4岁听障儿童与健听儿童通过听觉记忆词汇的测试结果,探讨两类儿童词汇记忆的差异。方法选取4岁听障儿童24名(其中助听时间1~2年的10名,助听时间2~3年的14名)和健听儿童14名,采用言语听觉反应评估(evaluationofauditoryresponsetospeech,EARS)中的封闭式句子测试内容分别对儿童进行测试,比较其结果。结果①在记忆句中名词、形容词方面,3组儿童之间不存在显著性差异(P〉0.05);②在记忆句中动词方面,助听时间1~2年与2~3年的听障儿童之间存在极显著性差异(P〈0.01),助听时间1~2年的听障儿童与健听儿童之间也存在显著性差异(P〈0.05),但助听时间2~3年的听障儿童与健听儿童之间不存在显著性差异(P〉0.05)。结论①助听时间越长,听障儿童通过听觉记忆句子中词汇的能力越强;②助听时间的长短影响听障儿童在记忆不同词性词汇方面的能力,这为听障儿童听觉训练提供了参考依据。