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:目的:探讨糖皮质激素治疗鼻息肉的可能机制。方法:随机将15例鼻息肉患者均分为强的松治疗组、地塞米松治疗组和未治疗组,以同期手术的5例鼻中隔偏曲者的下鼻甲黏膜组织作对照,用免疫组化法测定鼻息肉组织中嗜酸细胞趋化因子(eotaxin)蛋白的表达。结果:激素未治疗组eotaxin蛋白的表达比对照组显著增高(P〈0.01);激素治疗组eotaxin蛋白表达下降,与未治疗组比较差异有统计学意义(P〈0.01),与对照组比较差异无统计学意义(P〉0.05)。结论:Eotaxin蛋白是诱导嗜酸细胞在鼻息肉组织中浸润的重要趋化因子,糖皮质激素可下调eotaxin蛋白的表达,发挥抗嗜酸细胞炎症的作用。
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.