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时间:2018-11-16
《胶质母细胞瘤肿瘤干细胞的分离培养与生物学特性研究》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中国微侵袭神经外科杂志(CMINSJ),2009,14(1)··25·实验研究·胶质母细胞瘤肿瘤干细胞的分离培养与生物学特性研究牛朝诗,倪永丰,陈建民(安徽医科大学附属省立医院神经外科安徽省立体定向神经外科研究所,安徽合肥 230001)摘要:目的从人脑胶质母细胞瘤中分离培养脑肿瘤干细胞(braintumorstemcells,BTSC),并研究其生物学特性。方法利用无血清培养基和悬浮培养方法,从6例人胶质母细胞瘤标本中分离培养BTSC,并通过单克隆形成实验观察脑肿瘤干细胞球(braintumorsphere,BTS)的形成过程。将BTSC接种于含血清培养基,观察其在体外的分
2、化特点。将BTSC子代分化细胞更换培养条件,观察其在无血清培养基中的逆向分化现象。应用细胞免疫荧光染色对BTSC及其分化细胞进行鉴定。结果在人胶质母细胞瘤中成功分离出BTSC,其在无血清培养基中呈悬浮球状生长,具有很强的自我更新和增殖能力;免疫荧光显示其表达CD133。BTSC在含血清培养基中发生贴壁分化,分化后的子代细胞可表达CD133、神经元特异性烯醇化酶(NSE)和胶质纤维酸性蛋白(GFAP)。BTSC子代分化细胞在无血清条件下培养,能够再次增殖形成BTS,呈逆向分化现象。结论人胶质母细胞瘤中存在BTSC,其具有自我更新、无限增殖、多向分化以及逆向分化等生物学特性。关键
3、词:神经胶质瘤;胶质母细胞瘤;肿瘤干细胞;细胞培养;细胞分化;生物学特性中图分类号:R739.264文献标志码:A文章编号:1009-122X(2009)01-0025-04Isolation,cultureandbiologicalcharacteristicsoftumorstemcellsinhumanbrainglioblastomaNIUChaoshi,NIYongfeng,CHENJianminDepartmentofNeurosurgery,AnhuiProvincialHospitalAffiliatedtoAnhuiMedicalUniversity,Anh
4、uiProvincialInstituteofStereotacticNeurosurgery,Hefei230001,ChinaAbstract:ObjectiveToisolatebraintumorstemcells(BTSCs)fromhumanglioblastomaandstudytheirbiologicalcharacteristicsinvitro.MethodsBTSCswereisolatedfrom6freshhumanglioblastomaspecimensandculturedinsimplifiedserum-freemediumbynanos
5、pheresuspensionculturemethod.Themonoclonalformationexperimentwasperformedtoobservetheformationofbraintumorstemcellspheres.BTSCswereinoculatedontoserum-containingmediumforobservingtheirdifferentiationcharacteristicsandthentheiroffspringcellswereculturedinthesimplifiedserum-freemediumforobser
6、vingtheirretrodifferentiation.TheimmunofluorescencestainingofcellswasemployedtoidentifytheBTSCsanddifferentiatedcells.ResultsBTSCswereisolatedsuccessfullyfromhumanglioblastoma,whichpresentedasspheroidandsuspensiongrowthsinsimplifiedserum-freemedium,andhadstrongself-renewalandproliferationca
7、pacitieswiththeexpressionofCD133,andasadhesiondifferentiationintheserum-containingmedium,andthedifferentiatedcellsshowedexpressionsofCD133,neurone-specificenolase(NSE)andglialfibrillaryacidicprotein(GFAP).TheprogenyofBTSCsculturedinsimplifiedserum-freeme
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