简介:BACKGROUND:Studieshavedemonstratedthatthemechanismsunderlyingcellularapoptosissignaltransductionfocusontwopathways:intracellularmitochondriaandextracellulardeathreceptor.Thecurrentevidencesupportsthatsignaltransductionofcellularapoptosisalsoincludesendoplasmicreticulumstresssignaltransduction.OBJECTIVE:ToobserveCaspase-12expressionandcellularapoptosisfollowingischemiainratswithprogressivespinalcordcompression,andtoverifytheinfluenceofendoplasmicreticulumstressontheapoptosisinducedbyspinalcordinjury.DESIGN,TIMEANDSETTING:Arandomized,controlled,animaltrialwasperformedattheInstituteofNeuroscienceinChongqingMedicalUniversitybetweenJanuaryandOctoberin2006.MATERIALS:Immunohistochemicalkit,diaminobenzidine,andTUNELkitwerepurchasedfromBeijingZhongshanBiotechnology,China;rabbitanti-ratCaspase-12monoclonalantibodywasprovidedbySantaCruz,USA.METHODS:SixtyWistarrats,aged3-4months,wererandomlyassignedtoamodelgroup(n=50),whichunderwentspinalcordcompressionintheL_1segmentfollowingL_1laminectomyandarticularprocessexcisiontoestablishamodelofprogressivespinalcordcompression,andasham-surgerygroup(n=10),whichunderwentonlylaminectomy.Startingwiththefirstdayaftersurgery,theratswerelocallyanesthetized,theskinwasopened,andthescrewwasrotatedby1/4ofacycle,twiceweekly.MAINOUTCOMEMEASURES:At3,7,14,21,and28daysaftersurgery,ratsfromeachgroupwereanesthetized,andthespinalcordswereresected.Pathologicalchangesfollowingspinalcordcompressionweredeterminedusinghematoxylin-eosinstaining,Nissldye,andtransmissionelectronmicroscopy.TheTUNELmethodwasusedtoobserveneuronalapoptosisinthecompressedspinalcordsegments.ImmunohistochemistryandWesternblotwereutilizedtodetectCaspase-12expressioninthecompressedsegments.RESULTS:Cellularswelling,neuraldegeneration,andalteredendoplasmicreticulumstructureswereobservedat3days
简介:目的研究白细胞介素13受体α2(IL-13Rα2)在脑胶质瘤中的表达及其临床意义。方法采用免疫组化SABC法检测66例胶质瘤(其中Ⅰ-Ⅱ级31例,Ⅲ-Ⅳ级35例)标本中IL-13Rα2蛋白的表达,并利用RT-PCR法检测20例胶质瘤(其中Ⅰ~Ⅱ级8例,Ⅲ-Ⅳ级12例)新鲜标本中IL-13Rα2mRNA的表达,并与5例正常脑组织对照,分析胶质瘤中IL-13Rα2的表达强度与其病理级别的关系。结果Ⅰ-Ⅱ级胶质瘤和Ⅲ-Ⅳ级胶质瘤IL-13Rα2蛋白和mRNA的表达强度均有显著性差异(P〈0.01),病理级别越高其表达越强。在5例正常脑组织中,IL-13Rα2mRNA和蛋白的表达均为阴性,与胶质瘤相比,差异显著(P〈0.01)。结论IL-13Rα2在脑恶性胶质瘤中高表达,在低级别胶质瘤和正常脑组织仅低表达或不表达。提示在某些情况下IL-13Rα2检测有助于良性与恶性胶质瘤的鉴别诊断。而IL-13Rα2也可作为脑恶性胶质瘤靶向治疗的特异性靶标。
简介:目的探讨B超和吲哚菁绿血管造影(ICGA)在脑浅表动静脉畸形(AVMs)手术中的应用价值.方法回顾性分析自2009年1月至12月北京天坛医院神经外科血管组联合应用B超和ICGA辅助切除的16例脑浅表AVMs患者临床资料,同时分析2种术中辅助技术对AVMs定位、边界确定及血管类型鉴别的作用.结果术中联合应用ICGA和B超能有效帮助定位AVMs,确定其边界,帮助辨认供血动脉和引流静脉.16例脑浅表AVMs患者共行开颅手术16次,均全切病灶,手术后经DSA证实AVMs无残留.结论脑浅表AVMs手术中联合应用ICGA和B超能有效帮助准确切除病灶,判断有无畸形残留,具有较高的临床应用价值.