简介:BACKGROUND:Previousexperimentshaveconfirmedbonemorphogeneticproteins(BMPs)upregulatecholinergicexpressioninneuronsisolatedfromtheembryonicrathippocampusandcerebralcortex.Therefore,BMPscouldbeusefulfortreatingAlzheimer'sdiseaseandotherneurodegenerativediseases.OBJECTIVE:BMP-4wasinfusedintothehippocampaldentategyrusoffornix-fimbriatransectedratstotesttheeffectsofBMP-4oncholinergicexpressionindentategyrusneurons,andtoobservechangesinspatialmemorybehavior.DESIGN:Arandomizedcontrolledanimalexperiment.SETTING:DepartmentofNeurosurgeryandLaboratoryforCellBiology,InstituteofGeriatrics,GeneralHospitalofChinesePLA.MATERIALS:Twenty-sevenhealthyadultmaleSpragueDawley(SD)rats,weighing250-300g,wereprovidedbytheLaboratoryAnimalCenteroftheGeneralHospitalofChinesePLA.Reagents:BMP-4(B-2680,SigmaCompany)andcholineacetyltransferase(ChAT)antibody(AB5042,ChemiconCompany)wereusedinthisstudy.Equipments:aratstereotaxicinstrument(type:SN-2N,NarushigeGroup,Japan)andImage-prog-plusimageanalysissoftware(MediaCyberneticscompany,USA)wereusedinthisstudy.Theprotocolwascarriedoutinaccordancewithethicalguidelinesfortheuseandcareofanimals.METHODS:ThisexperimentwasperformedintheInstituteofGeriatrics,GeneralHospitalofChinesePLAbetweenJuly2004andMarch2005.Ratswererandomlydividedinto4groups:Alzheimer'sdiseasegroup(n=7),normalcontrolgroup(n=5),BMP-4-Alzheimer'sdiseasegroup(n=8),andmodelgroup(n=7).IntheAlzheimer'sdiseasegroup,thelefthippocampalfornix-fimbriaofratswastransectedtomimicAlzheimer'sdiseasesymptoms.IntheBMP-4-Alzheimer'sdiseasegroup,1μLBMP-4(10mg/L)wasperfusedintotheleftdentategyruswithamicroinjectorat1μL/min.Inthemodelgroup,1μLsalinewasperfusedintothesamepositionbythesamemethod.Twenty-eightdaysafterinjection,Morriswatermazetestwasperformedinallr
简介:目的探讨成人脑室-腹腔分流术后晚期感染并发症的临床特点及治疗措施。方法回顾性分析北京协和医院神经外科收治的4例脑积水术后感染患者的临床资料。对术后出现腹腔源性感染及多发感染并发症进行分析,并复习相关文献,总结其临床特点。结果4例术后晚期感染者均为交通性脑积水行脑室-腹腔分流术后患者。其中2例患者表现为粘连性肠梗阻、1例患者为多发腹腔内脓肿,1例患者为肺部及泌尿系感染,均合并颅内感染。经拔除脑室-腹腔分流管、抗生素治疗后感染均得到控制,后期行二次分流手术,疗效满意出院。随访6个月以上,4例患者均无感染复发。结论脑室-腹腔分流术后晚期感染,尤其腹腔源性感染临床相对少见,并常合并颅内感染。其治疗过程复杂,持续引流及系统性抗生素治疗是关键。
简介:目的探讨3DTOFMRA对颅内动脉瘤的诊断价值.方法对经过DSA确诊,并行3DTOFMRA检查的41例颅内动脉瘤病例进行回顾性分析.结果DSA共检出44个动脉瘤.3DTOFMRA检出其中的41个,敏感度93.2%,其中最大直径在3毫米以上的动脉瘤全部检出.最大密度投影(MIP)法显示其中35个动脉瘤,最大径为(7.01±7.29)mm,敏感度为79.5%;多平面重建(MPR)法显示36个动脉瘤,最大径为(8.09±8.22)mm),敏感度为81.8%.MIP法与MPR法所测得动脉瘤最大径间存在显著统计学差异.结论3DTOFMRA可以作为颅内动脉瘤的初筛方法.MIP及MPR法联合应用能提高诊断颅内动脉瘤的敏感性.
简介:BACKGROUND:Previousstudieshaveshownthatthemitochondrialstructureandfunctionaredamagedinanimalmodelsofepilepsy.Inaddition,theBcl-2proteiniscapableofregulatingmitochondrialstability.OBJECTIVE:ToobserveandvalidatechangesinmitochondrialstructureandBcl-2expression,andtoanalyzethesecharacteristicsinthehippocampalCA3regionofratmodelsofepilepsy.DESIGN,TIMEANDSETTING:Thisrandomized,controlled,animalexperimentwasperformedattheLaboratoryofElectronMicroscopyandDepartmentofHistologyandEmbryology,LuzhouMedicalCollegebetween2007and2008.MATERIALS:CoriamyrtinwasprovidedbythePharmacyFactoryofWestChinaUniversityofMedicalSciences.TheprimaryandsecondaryantibodieswereprovidedbyZhongshanGoldenbridgeBiotechnology,Beijing.METHODS:Atotalof44adult,male,SpragueDawleyratswererandomlydividedintocontrol(n=11)andepilepsy(n=33)groups.Ratsintheepilepsygroupwereinducedbycoriamyrtin(50μg/kg),whichwasinjectedintothelateralventricles.Theratswerethenobservedat3,6,and24hoursafterepilepsyinduction,with11ratsateachtimepoint.Epilepsywasnotinducedinratsfromthecontrolgroup.MAINOUTCOMEMEASURES:PathologicalchangesinthehippocampalCA3regionwereobservedbylightmicroscopy;Bcl-2expressionwasanalyzedbyimmunohistochemistry;andmitochondrialchangesinthehippocampuswereobservedundertransmissionelectronmicroscopy.RESULTS:(1)ThecontrolgroupdisplayedverylittleBcl-2proteinexpressioninthehippocampalCA3region.However,after3hoursofepilepsy,expressionwasvisible.By6hours,expressionpeakedandthensubsequentlydecreasedafter24hours,butremainedhigherthanthecontrolgroup(P<0.05).(2)Mitochondriaweredamagedtovaryingdegreesintheepilepsygroups.Forexample,mitochondriaedema,cristaespaceincrease,anddisappearanceofmitochondriawereapparent.Moreover,mitochondrialdamageoccurredpriortopathologicalchangesintheneuronsandnucleolus.CONCLUSION:
简介:目的对比分析3D-FIESTA联合3D-TOFMRA序列与3D-Slicer软件评估面肌痉挛神经血管关系的准确性。方法回顾性分析40例显微血管减压术(MVD)治疗面肌痉挛病人的临床资料,术前均行3D-FIESTA和3D-TOFMRA序列检查,并应用3D-Slicer软件进行三维重建评估神经血管关系,并预测责任血管,然后与术中所见进行比较。结果评估神经血管关系时,3D-FIESTA联合3D-TOFMRA序列与术中所见一致性的K值为0.263,三维重建与术中所见一致性的K值为0.633,二者无统计学差异(χ2=9.363,P=0.053);预测责任血管时,3D-FIESTA联合3D-TOFMRA序列与术中所见一致性的K值为0.643,三维重建与术中所见一致性的K值为0.921,二者有统计学差异(χ2=188.408,P=0.000)。3D-FIESTA联合3D-TOFMRA序列评估神经血管关系的灵敏度和特异度分别为89.7%和100%,而三维重建均为100%。结论使用3D-Slicer软件术前评估面肌痉挛病人神经血管关系及预测责任血管,比3D-FIESTA联合3D-TOFMRA序列更准确,与术中所见更接近,对术前制定手术计划更有帮助。
简介:BACKGROUND:Studieshavesuggestedthatfibronectinleucine-richtransmembraneprotein3(FLRT3)isrelatedtoinjuryandregenerationofthenervoussystem.However,theexpressionandbiologicalcharacteristicsoftheseproteinsremainpoorlyunderstood.OBJECTIVE:ToobtainFLRT3C-terminalgenefragments,toeffectivelyexpressandpurifythetargetproteins.DESIGN,TIMEANDSETTING:AnobservationalstudyofcellularandmolecularbiologywasperformedatthelaboratoryofHistologyandEmbryologyinXiangyaSchoolofMedicine,CentralSouthUniversitybetweenOctober2007andJune2008.MATERIALS:ThreeSpragueDawleyadultratswereusedtoextracttotalRNAfromratbrains.ThepGEX4T3andEscherichiacoli(E.coli)JM109werepurchasedfromPromega.E.coliBL21wasprovidedbyNovagen.METHODS:FLRT3proteincodingC-terminalDNAfragments,atalengthof786bp,wereamplifiedusingRT-PCRtechniquefromrattotalRNA.TheamplifiedproductswereclonedintotheexpressionvectorpGEX4T3.ArecombinantexpressionvectorwasthenconstructedandintroducedintoE.coliBL21.IsopropyI-D-thiogalactopyranosidewasappliedtoinduceexpressionofrecombinantGSTfusionproteins,followedbyisolation,purification,andrenaturationofinclusionbodiesthatcomprisedrecombinantproteins.Finally,thepurifiedrecombinantproteinwasobtained.MAINOUTCOMEMEASURES:DeterminationofFLRT3C-terminalDNAsequence;expressionoftargetproteinswasassayedbySDS-PAGEelectrophoresis;purifiedrecombinantproteinwasidentifiedwithWesternblotmethods.RESULTS:FLRT3proteincodingC-terminalDNAfragments,atalengthof786bp,weresuccessfullyharvestedthroughRT-PCRamplification,andwerethenclonesintotheprokaryoticexpressionvectorpGEX4T3.Theresultsofthesequencewereconsistentwiththeknowngenesequence.SDS-PAGEanalysisdemonstratedthattherewasaspecificproteinbandintherecombinantGSTfusionproteinsatarelativemolecularmassof56,600.Therecombinantproteinwasobservedintheinclusionbody,andh
简介:目的探讨PIAS3过表达对人脑胶质瘤U251细胞生长的作用及其可能的机制.方法通过实时荧光定量PCR检测PIAS3在正常脑细胞和脑胶质瘤U251细胞中的表达情况.转染PIAS3过表达载体,提高U251细胞中PIAS3表达水平,通过噻唑蓝(MTT)试验检测细胞增殖情况.WesternBlot验证PIAS3表达与增殖相关基因PI3K及Akt间关系.结果PIAS3在正常脑组织中相对高表达,而在人脑胶质瘤U251细胞中表达明显下降(P<0.01).体外转染PIAS3过表达载体能明显抑制U251细胞生长,并且有效抑制PI3K活性及p-Akt表达,但对总的Akt无明显影响.结论胶质瘤U251细胞中异常低表达的PIAS3发挥着重要的增殖促进作用,过表达PIAS3可通过抑制PI3K/Akt通路有效抑制U251细胞增殖.
简介:目的分析青春期少女生育动机及其生育意愿,从而追行有针对性的性教育工作。方法本研究基于Michaels(1993)的研究结果,自编“青春期少女生育动机”的调查问卷,封678名(随机抽样)高中女生进行调查。结果①青少女生育动机的先后排序为:“使个人生命延续”、“获得安全感和创造性”、“得到亲密情感和愉悦”、“获取权力和影响力”、“能够养儿防老”、“获得成人地位”、“能够传宗接代和取得社会认同”与“道德价值的支配”;②青春期少女面对意外怀孕是否生下孩子。除“能够养儿能防老”生育动机影响较低外,其它生育动机均有明颗影响,并显著性差异;③由回归分析结果得知,“道德价值的支配”和“获得覜密情感和愉悦”两个生育动机因素可以有效预测青春期少女的生育意愿,其中以“道德价值的支配”影响作用较大。结论青春期少女面对意外怀孕,对于决定是否生下孩于的生育意愿,有不同的生育动机。因此在青春期性教育当中,应当了解青少年生育动机、生育意愿的变化,从而更有针对性来开展性教育。
简介:目的:探究轻中度脑梗死急性期患者睡眠状况。方法:选取2016年1月至2017年2月期间在我院接受治疗的轻中度脑梗死急性期患者45例作为观察组,另选取与观察组患者年龄、性别相匹配的无脑梗死病史的住院患者40例作为对照组。记录2组的睡眠参数,观察比较2组患者的失眠率及失眠类型。结果:观察组患者的睡眠潜伏期、入睡后清醒时间数据高于对照组,总睡眠时间低于对照组,实验数据比较差异有统计学意义(P〈0.05);观察组患者的失眠率为92.4%,对照组患者的失眠率为63.2%,观察组数据高于对照组,数据比较差异有统计学意义(P〈0.05)。结论:轻中度脑梗死急性期患者睡眠状况较差,失眠率较高,睡眠结构紊乱,故在临床中应及时采取措施干预以改善轻中度脑梗死急性期患者睡眠状况。
简介:患者在ICU过渡期的生理和心理方面都具有一定的特殊性,ICU过渡期护理能够对患者短期和长期结局产生重要影响。本文从ICU过渡期护理的概念、过渡期患者安全影响因素、主要干预策略、干预效果评价等方面阐述国内外相关研究进展,以期为促进我国ICU过渡期护理研究与实践提供参考。
简介:MicroRNAs(miRNAs)aresmall,non-codingRNAsthatnegativelyadjustgeneexpressioninmultifariousbiologicalprocesses.However,theregulatoryeffectsofmiRNAsonSchwanncellsremainpoorlyunderstood.PreviousmicroarrayanalysisresultshaveshownthatmiRNAexpressionisalteredfollowingsciaticnervetransaction,therebyaffectingproliferationandmigrationofSchwanncells.ThisstudyinvestigatedwhethermiR-148b-3pcouldregulatemigrationofSchwanncellsbydirectlytargetingcullin-associatedandneddylation-dissociated1(Cand1).Up-regulatedexpressionofmiR-148b-3ppromotedSchwanncellmigration,whereassilencingofmiR-148b-3pinhibitedSchwanncellmigrationinvitro.FurtherexperimentsconfirmedthatCandlwasadirecttargetofmiR-148b-3p,andCandlknockdownreversedsuppressionofthemiR-148b-3pinhibitoronSchwanncellmigration.TheseresultssuggestedthatmiR-148b-3ppromotedmigrationofSchwanncellsbydirectlytargetingCandlinvitro.
简介:2007年8月24-50日,第5届国际儿科护理大会(8月24-25日)暨第25届国际儿科大会(8月25~50日)在希腊雅典胜利召开。参加第5届国际儿科护理大会的代表来自16个国家178名。大会开设专题讲座14个,录取论文121篇,其中口头发言91篇(中国2篇口头发言论文分别来自重庆医科大学附属儿童医院和深圳市儿重医院),墙报交流50篇。内容涉及到儿科护理伦理学、外科护理、青春期护理、肥胖/营养不良、慢性疾病如哮喘及肿瘤惠儿的护理、儿童疼痛管理、儿童虐待、糖尿病、孕产妇健康、新生儿护理、母乳喂养、感染、预防接种、沟通、教育与培训、护理研究、儿科护士的专业化等。