简介:目的对河北涿州、高碑店地区重度耳聋患者进行分子流行病学调查,了解耳聋的常见分子病因。方法对河北涿州、高碑店市特殊教育学校64名耳聋学生进行遗传性耳聋问卷调查、全面的体格检查、耳鼻咽喉专科检查以及听力学评估(包括纯音测听和声导抗)。对64名非综合征型感音神经性耳聋患者分别进行GJB2基因235delC突变、线粒体DNA12SrRNA基因A1555G点突变的限制性内切酶分析。应用直接测序法检测SLC26A4基因IVS7—2A〉G突变。结果7例(10.93%)携带GJB2基因235delC纯合突变;9例(14.06%)携带GJB2基因235delC杂合突变;6例(9.37%)携带SLC26A4基因ⅣS7—2A〉G纯合突变,12例(18.75%)携带SLC26A4基因IVS7—2A〉G杂合突变:未发现携带线粒体DNA12SrRNA基因A1555G点突变者。结论河北涿州、高碑店地区非综合征型耳聋患者存在较高的GJB2基因235delC和SLC26A4基因ⅣS7—2A〉G突变发生率,而线粒体DNA12SrRNA基因A1555G突变发生率低于全国平均水平。聋病分子流行病学调查提示河北涿州、高碑店地区20.3%的非综合征型耳聋患者在分子水平能够明确诊断.另有32.81%的患者有遗传倾向。进行准确的耳聋早期诊断、遗传咨询、及时干预和治疗在这一地区的聋哑人群中非常重要。
简介:《喉科手术学》2000年出版,2002年第2次印刷。近十年间随着医学技术飞跃发展,喉科手术也在不断更新及创新。为了适应新的形式,人民卫生出版社于2007年出版了《喉科手术学》第2版。此版主要围绕有关保留、改菩喉功能的理论,特别是新发展的手术为主要增修内容,增加了与保留和改善喉功能研究发展相关的喉及喉咽的解剖及生理:增补了保留或改善喉功能的手术、喉显微手术、喉咽癌激光手术、喉返神经单、双侧麻痹及喉手术后喉功能不良新发展的喉功能整复术、喉误吸手术、喉蹼切除术、喉肉芽肿切除术、杓状软骨脱位、骨折和固定的整复术:补充了喉气管狭窄,喉、喉咽和颈食管癌等新的手术方法;充实了甲状腺肿瘤手术,颈淋巴结清扫术内容,
简介:TheGJB2gene(connexin26)hasbeenshowntoberesponsibleforDFNB1andDFNA3.WescreenedtheGJB2genein488patientswithprelingualdeafness(Group1),124withpostlingualdeafness(Group2),and117normalhearingsubjects(Group3).Wefoundthat,inGroup1,65patients(13.32%)werehomozygotesorcompoundheterozygotesand51patients(10.45%)carriedasinglepathogenicmutation.The235delCmutationwasthemostfrequentmutation,accountingfor73.22%oftheknownpathogenicallelesinGroup1.NohomozygotesorcompoundheterozygotesweredetectedinGroup2orGroup3.Somepostlingualdeafpatients(2.42%)andnormalhearingsubjects(4.27%)were235delCcarriers.Ourpreliminarydataindicatethat235delC,themostfrequentmutationidentifiedinthisstudy,isamajorcauseforprelingualdeafness.
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:WehavedeliveredviralvectorscontainingeitherChop2fusedwithGFP,Channelrhodopsin-2(ChR2),orHalorhodopsin(HaloR)fusedwithmCherry(toformlightgatedcationchannelsorchloridepumps,respectively),intothedorsalcochlearnucleus(DCN).OnetoeighteenmonthslaterweexaminedtheCNandinferiorcolliculus(IC)forevidenceofvirallytransfectedcellsandprocesses.ProductionofChR2andHaloRwasobservedthroughouttheDCN.Rhodopsinlocalizationwithinneuronswasdetermined,withelongate,fusiformandgiantcellsidentifiedbasedonmorphologyandlocationwithintheDCN.ProductionofChR2andHaloRwasfoundatboththeinjectionsiteaswellasinregionsprojectingtoandfromtheDCN.LightdrivenneuronalactivityintheDCNwasdependentuponthewavelengthandintensityofthelight,withonlytheappropriatewavelengthresultinginactivationandhigherintensitylightresultinginmoreneuronalactivity.Transfectingcellsviaviraldeliveryofrhodopsinscanbeusefulasatracttracerandasaneuronalmarkertodelineatepathways.Inthefuturerhodopsindeliveryandactivationmaybedevelopedasanalternativetoelectricalstimulationofneurons.
简介:1耳科常用激光激光是继原子能、计算机以及半导体之后,人类的又一重大发明。因其前所未有的高能量、高精确性等特点,激光自发明伊始即被广泛应用于包括临床医学在内的各个领域。在耳科学领域,空间狭小、组织功能脆弱等特征使得耳科手术始终充满了挑战。近年来,随着显微设备、激光设备及手术技术的不断进步,激光技术在耳科学的应用日趋普及并取得了巨大的成功。
简介:MutationsinGJB2genearethemostfrequentlyfoundmutationsinpatientswithnonsyndromichearingimpairment.However,thespectrumandprevalenceofmutationsinthisgenevaryamongdifferentethnicgroups.InChina,30,000infantsarebornwithcongenitalhearingimpairmentannually.Inordertoprovideappropriategenetictestingandcounselingtothefamilies,weinvestigatedthemolecularetiologyofnonsyndromicdeafnessin103unrelatedschoolchildrenattendingNantongSchoolfortheDeafandMuteinJiangsuProvince,China.ThecodingexonoftheGJB2genewasPCRamplifiedandsequenced.SixtytwoGJB2mutantalleleswereidentifiedin35.9%(37/103)ofthepatients.Twentyfivepatientscarriedtwopathogenicmutationsand12patientscarriedonemutantallele.The235delCwasthemostcommonmutationaccountingfor69.4%(43/62)ofGJB2mutantalleles.TheGJB2mutantallelesaccountedfor30.1%(62/206)ofallchromosomesresponsiblefornonsyndromichearingimpairment.Testingofthe3mostprevalentdeleteriousframeshiftmutationsinthiscohortdetected100%ofallGJB2mutantalleles.TheseresultsdemonstratethataneffectivegenetictestingofGJB2geneforpatientsandfamilieswithnonsyndromichearingimpairmentispossible.
简介:ObjectiveToinvestigateGJB2mutationprevalencesintheUigurandHanethnicgroupsinXinjiang,China,anddeterminetherelationshipbetweenethnicityandGJB2genemutations.MethodsInformationregardingethnicityofpatients'familieswasobtainedthroughmedicalrecordsreviewand/orpatientinterview.Bloodsampleswerecollectedfrom61Uigursand66Hansfordirectsequencingofthecodingregionandintron/exonboundariesoftheGBJ2gene.ResultsCarrierfrequencyofGJB2mutationswassimilarbetweentheUigurandHansubjects.TheGJB235delGmutationwasseenonlyinUigurpatientswithhearingloss,whereasthe235delCmutationwasidentifiedinbothUigurandHanpatients.TheallelicFrequencyof35delGmutationwas7.4%(9/122)inUigurdeafstudents,butnoneinHandeafstudents(0/128)andUigurcontrols(0/196).TheallelicfrequencyofGJB2235delCmutationinUigurandHandeafstudentswas5.7%and9.8%,andthatof299-300delATmutationwas0.8%and5.5%,respectively.V27IandE114Gwerethemostfrequenttypesofpolymorphism.ConclusionWefoundanAsian-specificGJB2diversityamongUigurs,andcomparableGJB2contributiontodeafnessinUigurandHanpatients.Thehighcarrierfrequencyof35delGinUigurs(11.5%)isprobablydefinedbygenedrift/foundereffectinaparticulargroup.EventhoughGJB2mutationshavebeenwidelyreportedintheliterature,thisdiscussionrepresentsthefirstreportofGJB2mutationsinChinesemulti-ethnicpopulations.
简介:1喉癌喉咽癌CO2激光手术简史激光是20世纪60年代以来发展异常迅速的新科学技术,可以对生物组织产生强的热作用,从而实现对生物组织的切割、汽化和凝固。将激光技术应用于喉显微外科手术,
简介:目的检测不同年龄大鼠下丘α-氨基羟甲基恶唑丙酸(α-amino-3-hydroxy-5-methyl-4-isoxazole—propionicacid,AMPA)受体亚型GluR2/3(Glutmaterecptor2/3)的分布及其与听性脑干反应(auditorybrainstemresponse,ABR)的关系。方法分别测定1,4,9,15周龄SD大鼠ABR反应阈;FITC标记免疫组化方法检测GluR2/3亚型在不同周龄SD大鼠下丘中的分布。结果1周龄SD大鼠检测不到明显的ABR波形.4周龄起能检测到稳定的ABR波形。GluR2/3在不同年龄大鼠下丘神经元中均有表达。1周龄大鼠染色较少,位于胞膜;4周龄时表达强,主要位于胞膜;9周龄时较弱,位于胞膜及胞质;15周龄时可见于胞膜及核周胞质,但胞质较强。4周龄与1、9、15周龄胞膜相比,GluR2/3亚型的表达较强,差异有显著性;1周与9周、15周龄胞膜之间.GluR2/3的表达较弱,差异无显著性。结论出生后GluR2/3在下丘的含量及分布部位均随年龄变化而变化.这种改变可能与下丘的发育相关。
简介:MutationsintheGJB2genearethemostfrequentlyfoundmutationsinpatientswithnonsyndromichearingimpairment.However,themutationspectrumandprevalenceofmutationsvaryamongdifferentethnicgroups.Everyyear,30,000babiesarebornwithcongenitalhearingimpairmentinChina.Inordertoprovideappropriategenetictestingandcounselingtothefamily,weinvestigatedthemolecularetiologyofnonsyndromicdeafnessin135unrelatedschoolchildrenattendingChifengMunicipalSpecialEducationSchoolinInnerMongolia,China.ThecodingexonoftheGJB2genewasPCRamplifiedandsequenced.Inaddition,the12SrRNAgeneandtRNAser(UCN)ofmitochondrialgenomewerescreenedformutationsresponsibleforhearingimpairment.SixtyfourGJB2mutantalleles,including60confirmedpathogenicallelesand4unclassifiedvariants,wereidentifiedin31.1%(42/135)ofthesubjects.Twentytwosubjectscarriedtwopathogenicmutationsand20subjectscarriedonemutantallele,includingonesubjectwithoneautosomaldominantmutation.The235delCwasthemostcommonmutationaccountingfor65.6%(42/64)GJB2mutantalleles.WhencomparedtootherAsianpopulations,oursubjectcohorthadhigherfrequencyof235delCmutationthantheJapanesepopulation.TheGJB2mutantallelesaccountfor23.7%(64/270)ofallchromosomesresponsiblefornonsyndromichearingimpairment.Testingofthe4mostprevalentdeleteriousframeshiftmutations(235delC,299_300delAT,176_191del16,and560_605ins46)inthiscohortdetected90%ofallGJB2mutantalleles.TheseresultsdemonstratethateffectivegenetictestingoftheGJB2geneforpatientsandfamilieswithnonsyndromichearingimpairmentispossibleintheChinesepopulation.Sincethemostcommon309kbGJB6deletionisnotdetectedandonlyone1555A>GmutationinmitochondrialDNAisdetectedinourpatients,investigationofmutationsinothernucleargenesand/orenvironmentalfactorsresponsiblefornonsyndromichearingimpairmentintheChinesepopulationis
简介:目的构建6种分别携带GJB2基因错义突变A40G、V37I、L90P、L90V、V84L和W44C的真核表达载体,转染HEK293细胞,建立6种错义突变的稳定表达细胞系。方法以野生型Cx26-EGFP融合蛋白质粒为模板,用Stratagene公司定点突变试剂盒构建错义突变表达载体,直接测序鉴定序列正确性,选取含有突变的载体转染HEK293细胞,G418选择性培养2周,流式细胞仪筛选表达阳性细胞,扩增培养形成稳定表达人Cx26突变的HEK293细胞系。培养细胞用4%多聚甲醛固定,鬼笔环肽和4',6-二脒基-2-苯基吲哚衬染细胞核,荧光显微镜下检测结果。结果6种突变表达载体经过测序,均含有相应突变,无多余突变出现,转染后均可在细胞间形成缝隙连接,呈现绿色荧光。结论成功构建6种携带GJB2基因错义突变的真核表达载体,为进一步研究错义突变致聋原因奠定了实验基础。
简介:目的本实验对分泌性中耳炎患者的中耳积液标本进行白介素-2(IL-2)浓度检测和分析,以探索其在分泌性中耳炎中的临床意义.方法用双抗夹心酶联免疫吸附法检测中耳积液、患者血清及对照血清中IL-2的浓度.结果实验组中耳积液中IL-2的浓度明显高于血清中的浓度;实验组血清中IL-2的浓度较对照组血清高;急性期组IL-2含量较慢性期组高;行首次穿刺及二次穿刺患者之间,中耳积液中IL-2的浓度无明显差异(P>0.05);而行三次或三次以上穿刺者中耳积液中该因子的浓度则明显升高(P<0.01).结论中耳积液中的IL-2是由中耳腔局部产生的,而非单纯由血液中渗透而来;中耳积液中IL-2的高浓度可作为分泌性中耳炎转为慢性病程或迁延不愈的参考.
简介:摘要目的对CO2激光在早期声门型喉癌治疗中的应用进行临床分析和评价。方法对2011年12月-2014年2月在我院耳鼻喉科行CO2激光治疗的60例早期声门型喉癌患者的临床资料进行总结和分析。结果术后8例复发,复发率为13.3%(8/60)。其中,T1a病变3例,复发率为11.5%(3/26),T1b病变3例,复发率为20.0%(3/15),T2病变2例,复发率为20.0%(2/10),组间比较差异无统计学意义(χ2=0.180,P>0.05);21例患者肿瘤浸润至前联合,有7例复发,复发率为33.3%(7/21);39例患者肿瘤未浸润至前联合,有2例复发,复发率为5.1%(2/39),两组间差异有统计学意义(χ2=9.003,P<0.05)。结论CO2激光手术治疗早期声门型喉癌疗效安全可靠,对发音功能保留好,值得在临床推广应用。