简介:ObjectivesToinvestigatetheexpressionofhistamineH1receptors(H1R)inthevestibularnucleusofbrainsteminratsandtheroleofH1Rinmotionsickness(MS).MethodsAtotalof24healthySprague-Dawleyratsweredividedrandomlyintofourgroups(n=6each)whichdeterminediftheanimalswouldreceiveinductionofMSordrug(promethazine)treatment:MS(-)/Drug(-);MS(+)/Drug(-);MS(-)/Drug(+at0.25mg);andMS(+)/Drug(+).MSwasinducedbycomplexmotionstimulationandtheconditionedtasteaversionwasusedasabehavioralindicatorofMS.Thevolumeof0.15%sodiumsaccharinsolution(SS)intakewithin45minutesaftermotionstimulationwasmeasured.H1Rinthevestibularnucleuswasexaminedbyimmunofluorescencestaining.TheexpressionofH1Rproteininbrainstemtissueatvestibularnucleuslevelwasdetectedbywesternblot.ResultsThemeanSSintakevolumeintheMS(+)/Drug(-)group(8.8ml)wassignificantlylessthanthatoftheMS(-)/Drug(-)group(15.1ml)(P<0.01).ThemeanSSintakevolumeoftheMS(-)/Drug(+)group(14.8ml)wassimilartothatoftheMS(-)/Drug(-)group.ThemeanSSintakevolume(9.6ml)oftheMS(+)/Drug(+)groupwasmorethanthatoftheMS(+)/Drug(-)group(P<0.01),butlessthanthatoftheMS(-)/Drug(-)grouporMS(-)/Drug(+)group(P<0.01).ImmunofluorescencestainingshowedpositiveexpressionofH1Rinthevestibularnucleusofbrainstemandtheexpressionwasenhancedbymotionstimulation.WesternblotanalysisshowedthatH1Rproteinexpressedinthebrainstemtissueatvestibularnucleuslevelandtheexpressionalsoincreasedsignificantlyaftermotionstimulation.TheMS-inducedincreaseofH1Rwasnotaffectedsignificantlybypromethazine.ConclusionsH1RsexistinthevestibularnucleusinratsandH1Rexpressionisup-regulatedbymotionstimulation,butnotaffectedbypromethazine.ThefindingsindicatethatthehistaminergicsystemisinvolvedinMS.Promethazine,asanH1Rblocker,mayplayitsanti-MSrolebycompetingthebindingsiteon
简介:听力障碍的患病率较高,约占社会人群总数的6%~10%,导致听力障碍者的言语交流能力大幅下降,进而严重影响了他(她)们的工作和生活。如果听力障碍者好耳侧在500~4000Hz频率范围内的平均听力损失大于40dBHL,则被称为听力残疾。第二次全国残疾人抽样调查(2006年)数据显示,我国听力残疾人口2780万,其中0~6岁儿童13.7万,60岁及以上老年人2045万,且大多为感音神经性聋,需要验配合适的助听器,以提高他们的听敏度并改善其言语交流状况。面对需要服务的庞大群体,
简介:FragileXsyndromeisthemostcommonformofinheritedmentalretardationaffectingupto1in4000individuals.ThesyndromeisinducedbyamutationintheFMR1gene,causingadeficiencyinitsgeneby-productFMRP.ImpairmentinthenormalfunctioningofFMRPleadstolearningandmemorydeficitsandheightenedsensitivitytosensorystimuli,includingsound(hyperacusis).ThemolecularbasisoffragileXsyndromeisthoroughlyunderstood;however,theneuralmechanismsunderlyinghyperacusishavenotyetbeendetermined.Astheinferiorcolliculus(IC)istheprincipalmidbrainnucleusoftheauditorypathway,thecurrentstudyaddressesthequestionsunderlyingtheneuralmechanismofhyperacusiswithintheICoffragileXmice.AcuteexperimentswereperformedinwhichelectrophysiologicalrecordingsoftheICinFMR1-KOandWTmiceweremeasured.ResultsshowedthatQ-valuesforWTweresignificantlylargerthanthatofFMR-1KOmice,indicatingthatWTmiceexhibitsharpertuningcurvesthanFMR1-KOmice.WealsofoundtheratioofthemonotonicneuronsintheKOmicewasmuchhigherthantheWTmice.TheseresultssuggestthatlackofFMRPintheauditorysystemaffectsthedevelopmentalmaturationandfunctionofstructureswithintheauditorypathway,andinthiscasespecificallytheIC.ThedysfunctionobservedwithintheauditoryneuralpathwayandinparticulartheICmayberelatedtotheincreasedsusceptibilitytosoundasseeninindividualswithfragileXsyndrome.OurstudymayhelponunderstandingthemechanismsofthefragileXsyndromeandhyperacusis.
简介:目的构建含有人髓细胞白血病基因-1(myeloidcellleukemia-1,MCL1)和绿色荧光蛋白基因(pEGFP)的真核共表达载体,为聋病的基因治疗奠定实验基础。方法应用基因重组技术和限制性内切酶酶切,及基因测序方法,构建并鉴定pEGFP-MCL1真核表达质粒。经脂质体介导转染293细胞系,荧光显微镜下观察pEGFP-MCL1真核表达质粒在293细胞系中的表达,利用逆转录-聚合酶链反应(Reversetranscriptionpolymerasechainreaction,RT-PCR)检测MCL1mRNA的表达,WesternBlot(蛋白质印迹)方法检测MCL1蛋白的表达。结果阳性重组子经酶切鉴定含有MCL1基因片段,基因测序结果与GenBank中MCL1序列相同。重组pEGFP-MCL1真核表达质粒转入293细胞系后24小时,荧光显微镜下可见绿色荧光表达,RT-PCR能够扩增出MCL1的条带,WesternBlot检测出40kDa大小的蛋白。结论成功地构建了含有人全长MCL1基因和pEGFP基因的真核共表达载体,且能在哺乳动物293细胞系中表达。
简介:摘要目的探讨色素性隆突性纤维肉瘤病人行手术切除并游离植皮治疗的围手术期护理方法。方法针对该个案病例给予术前心理疏导、评估及准备,术后给予术后专科护理、VSD引流技术护理、血栓预防及功能康复指导。结果该案移植皮片全部成活,无感染,随访3个月,无复发,外形满意,患肢功能恢复正常。结论科学严谨规范的护理措施可以帮助手术顺利完成,增加移植皮肤成活几率,促进术后肢体功能康复,极大的减少术后并发症的发生,提高手术成功率。
简介:目的对不同类型先天性外耳道狭窄与闭锁的患者,实施外耳道成形术重建外耳道改善听力。对新外耳道的状态、听力变化和并发症情况进行随访,对影响远期疗效的相关因素进行分析,为外耳道畸形手术适应症选择、手术方案制定与决策提供依据。材料与方法一般资料:本文收集07年9月—10年9月期间资料完整的73例先天性外耳道狭窄或闭锁行外耳道成形术者。入选标准依据Jahrsdoerfer的中耳评分法;术前伴难以控制的外耳道感染、胆脂瘤破坏鼓室者除外;平均随访时间22.0月、平均手术年龄12.8岁。治疗方法采用耳甲切口、上鼓室入路,常规替尔氏皮片外耳道植皮。新鼓膜采用颞肌筋膜或乳突骨膜外覆盖部分裂厚皮片,或小外耳道皮肤转位与小鼓膜形成新鼓膜;凡士林抗生素纱条紧密填塞固定外耳道植皮,如无感染发生3-4周后取出,取出后常规膨胀海绵或消毒棉球扩张。结果狭窄组19例(95.0%)达实用听力(ABG〈30dB),且长期结果稳定,外耳道并发症少。其中4例(20.0%)术后气骨导差小于10dB。新外耳道感染及耳甲腔耳周皮肤湿疹和鼓膜外移钝角化少见。闭锁组仅27例(50.9%)获实用听力(ABG〈30dB),并发症多。两组之间在听力改善、长期疗效和并发症发生率均有显著差异,闭锁组的效果较差。结论新外耳道状态、听力变化和并发症与是否伴有小鼓膜和正常外耳道皮肤密切相关,是影响远期疗效的重要因素;对完全闭锁者再造外耳道需要更慎重。
简介:摘要目的分析在心脏直视下行二尖瓣膜置换同期行双极射频消融术治疗房颤的临床疗效,及术前危险因素与术后转律的关系分析。方法对49例患有二尖瓣膜疾病合并房颤的患者,进行二尖瓣膜置换术同期行双极射频消融术治疗房颤,术后常规应用胺碘酮维持窦性心律,分析双极射频消融术的可行性及疗效;依照术后随访的患者是否转为窦性心律分为转律组和房颤组,应用t检验、Logistic回归分析,计算优势比(OR)及95%可信区间(95%CI)。结果术后1年随访39例,其中30例转复为窦性心律,转复率76.92%。左心房内径大小、房颤的病程长短、心电图的f波振幅高低是消融术后影响房颤转复律的危险因素。结论二尖瓣置换同期行双极射频消融术治疗房颤是一种可行、安全、有效的治疗方法,对于左房内径小、房颤病程短、心电图f波振幅高的患者往往效果更为显著。