简介:目的探讨短暂性脑缺血发作与颈动脉粥样硬化斑块及血脂异常的关系。方法对82例短暂性脑缺血发作患者(TIA组)和76例非心脑血管病患者(对照组)进行颈动脉超声检查,观察颈动脉血管形态、内-中膜厚度、有无斑块和颈动脉内径。同时进行血脂水平测定。结果TIA组颈动脉粥样硬化斑块检出率(63.41%),对照组检出率(21.05%),差异有统计学意义(P〈0.01);血脂水平与对照组比较,差异有统计学意义(P〈0.05);两组中颈动脉粥样硬化斑块组血脂水平明显高于无斑块组(P〈0.05)。结论颈动脉粥样硬化斑块与短暂性脑缺血发作的发生有密切关系,血脂代谢异常与颈动脉粥样硬化斑块形成有关,对颈动脉粥样硬化斑块及血脂异常进行的积极干预,对预防短暂性脑缺血发作发生有重要临床意义。
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:目的探讨切除脑功能区胶质瘤手术新技术与方法。方法112例胶质瘤患者在术中全麻唤醒状态下,通过术中B超或神经导航定位病灶,直接电刺激定位脑功能区结构,并在清醒状态下切除病变。术后随访时间3~84个月。结果107例唤醒良好,术中有99例定位出运动区,61例定位出语言相关的功能区皮质,18例定位出感觉区。病变全切66例,次全切除34例,部分切除12例。术后短暂性一侧肢体活动障碍37例,短暂的语言障碍26例,手术相关的永久性神经功能障碍3例,无手术死亡,全部患者术后无痛苦回忆。结论全麻术中唤醒技术、术中直接电刺激和术中脑超声技术是切除功能区胶质瘤的三项主要技术;综合使用这些技术能够在术中明确脑功能区与肿瘤的关系,做到最大限度地切除脑功能区病变和保护脑功能。
简介:随着对阿尔茨海默病(Alzheimerdisease,AD)认识的深入,作为正常老龄化向痴呆过渡状态的轻度认知功能障碍(mildcognitiveimpairment,MCI)越来越受到人们的关注。对轻度认知功能障碍积极进行干预是延缓认知功能进一步衰退的有效措施,但目前关于轻度认知功能障碍干预措施的报道较少,药物也仅有个别的多中心研究报道。因此,笔者拟就目前国内外对轻度认知功能障碍的治疗现状及进展进行系统性回顾。由于最多见的轻度认知功能障碍亚型是遗忘型认知功能障碍即阿尔茨海默病的前期,故而关于轻度认知功能障碍的干预策略多沿袭了阿尔茨海默病的治疗方案。