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1、·512·南方医科大学学报(JSouthMedUniv)2011;31(3)·基础研究·脂肪组织源性干细胞分步诱导分化为神经元样细胞121311111陈盼盼,张丽华,董为人,刘杰明,张易,乔伟光,陈英华,赵姝,郭家松12南方医科大学基础医学院组织学与胚胎学教研室,广东广州510515;佛山市科学技术学院基础医学院,广东3佛山528305;南方医科大学附属顺德区人民医院神经外科,广东顺德528300摘要:目的探讨脂肪组织源性干细胞(ADSCs)诱导分化为神经元样细胞的可行性。方法ADSCs分离自雄性SD大鼠附睾脂肪垫,差速贴壁法纯化ADSCs,传至第3代培养细胞行流式细
2、胞术行表型鉴定(CD106,CD11b,CD45,CD90,CD29,CD49d),并进行成脂诱导。取鉴定后的ADSCs用分步诱导法,即先用含10ng/ml碱性成纤维细胞生长因子(bFGF)、20ng/ml表皮生长因子(EGF)、2%B27的DMEM/F12培养基I培养,诱导其向神经干细胞转分化,再用含10ng/ml胶质细胞源性神经营养因子(GDNF),10ng/ml脑源性神经营养因子(BDNF),1μmol/L维甲酸(RA)的培养基II诱导分化为神经元样细胞(NLCs),免疫细胞化学法鉴定细胞表面标记物巢蛋白(nestin),神经细胞特异性标志微管相关蛋白(MAP2
3、),神经元核蛋白(NeuN)。结果分离纯化的ADSCsCD90、CD29表达强阳性;成脂诱导分化后细胞油红O染色阳性;ADSCs经培养基I培养7d后聚集成球样细胞团悬浮于培养液中,表达nestin;继而用培养基II诱导分化4h后细胞球逐渐贴壁,球周边少数细胞向外发出突起,形似神经元,MAP2、NeuN均呈阳性。结论特定条件下,ADSCs在体外可被逐步诱导分化为NLCs。关键词:脂肪组织源性干细胞;分化;神经干细胞;神经元中图分类号:Q813文献标志码:A文章编号:1673-4254(2011)03-0512-06Atwo-stepprotocolforinductio
4、nofratadiposetissue-derivedstemcellsintoneuron-likecellsCHENPan-pan1,ZHANGLi-hua2,DONGWei-ren1,LIUJie-ming3,ZHANGYi1,QIAOWei-guang1,CHENYing-hua1,ZHAOShu1,GUOJia-Song11DepartmentofEmbryologyandHistology,SchoolofBasicMedicalSciences,SouthernMedicalUniversity,Guangzhou510515,China;2School
5、ofMedicine,FoshanUniversity,Foshan528000,China;3DepartmentofNeurosurgery,ShundePeople’sHospital,Shunde528300,ChinaAbstract:ObjectiveToinvestigatethedifferentiationpotentialofratadiposetissue-derivedcells(ADSCs)intoneuron-likecellsinvitrousingatwo-stepinductionprotocol.MethodsADSCsisolat
6、edfromtheepididymalfatpadsinmaleSDratsbymeansofdifferentialattachmentwereculturedinvitroandsubjectedtoadipogenicinduction.AfterflowcytometricidentificationofthecellsurfaceantigensCD106,CD11b,CD45,CD49d,CD90andCD29,thethird-passageADSCswereinducedtotransdifferentiateintoneuralstemcell(NS
7、C)-likecellsinDMEM/F12mediumcontaining10ng/mlbasicfibroblastgrowthfactor(bFGF),20ng/mlepidermalgrowthfactor(EGF)and2%B27.TheresultantNSC-likecellsweretheninducedtodifferentiateintoneuron-likecellsintheneurobasalmediumcontaining10ng/mlbrain-derivedneurotrophicfactor(BDNF),10ng/m