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1、CMYK第35卷第1期中山大學(xué)學(xué)報(醫(yī)學(xué)科學(xué)版)Vol.35No.12014年1月JOURNALOFSUNYAT-SENUNIVERSITY(MEDICALSCIENCES)Jan.2014神經(jīng)干細(xì)胞的單層培養(yǎng)及分化過程中HES1和MASH1的表達(dá)變化劉菲菲111*112,徐麗萍,龍大宏,陳艷,張君度,龍靜怡(1.廣州醫(yī)科大學(xué)人體解剖教研室,廣東廣州510182;2.南方醫(yī)科大學(xué)2011級臨床醫(yī)學(xué)本科班,廣東廣州510515)摘要:【目的】建立神經(jīng)干細(xì)胞(NSC)體外培養(yǎng)方案,使NSC的體外可以得到增殖和分化,并檢測NSC分化過程中H
2、ES1和MASH1的表達(dá)變化?!痉椒ā繜o菌條件下取SD大鼠胚胎端腦,無血清懸浮培養(yǎng),形成P2代神經(jīng)球后,將神經(jīng)球消化成單細(xì)胞,分為神經(jīng)球懸浮培養(yǎng)和單層貼壁培養(yǎng),并對兩種不同培養(yǎng)方式下的NSC進(jìn)行干性鑒定和分化能力鑒定。用不同濃度(20、40、80μg/L)的腦源性神經(jīng)生長因子(BDNF)誘導(dǎo)NSC分化,選出最合適的濃度。用BDNF最佳誘導(dǎo)濃度誘導(dǎo)NSC分化,Q-PCR檢測分化過程中HES1和MASH1的表達(dá)變化?!窘Y(jié)果】神經(jīng)球懸浮培養(yǎng)和單層貼壁培養(yǎng)均可得到的NSC;分化3d后,在不加入任何誘導(dǎo)因素的情況下,單層貼壁培養(yǎng)的NSC能更高比
3、例[(19.55±1.09)%]地分化為β-tubulinⅢ陽性細(xì)胞;BDNF40μg/L能誘導(dǎo)出更多的β-tubulinⅢ陽性細(xì)胞[(34.17±0.60)%];在分化1、3和7d時,Q-OCR結(jié)果表明MASH1在BDNF誘導(dǎo)下組較NSC和對照組表達(dá)水平明顯上升?!窘Y(jié)論】單層貼壁培養(yǎng)的神經(jīng)干細(xì)胞更利于分化為神經(jīng)元,BDNF為40μg/L時能誘導(dǎo)出更高比例的神經(jīng)元,BDNF可以誘導(dǎo)MASH1在NSC分化過程中表達(dá)明顯上升。關(guān)鍵詞:神經(jīng)干細(xì)胞;神經(jīng)球;單層貼壁培養(yǎng);分化;腦源性神經(jīng)生長因子中圖分類號:R322.8文獻(xiàn)標(biāo)志碼:A文章編號:
4、1672-3554(2014)01-0018-07CulturDOI:10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2014.0004eofNeuralStemCellinVitroandtheExpressionChangesofHES1andMASH1duringDifferentiation111*112LIUFei-fei,XULi-ping,LONGDa-hong,CHENYan,ZHANGJun-du,LONGJing-yi(1.DepartmentofHumanAnatomy,G
5、uangzhouMedicalUniversity,Guangzhou510182,China;2.DepartmentofClinicMedicine,Grade2011,NanfangMedicalUniversity510515,Guangzhou)Abstract:【Objective】CulturingofNSCinvitrowereinvestigated,inwhichNSCcouldproliferateanddifferentiate.TheexpressionchangesofHES1andMASH1weredet
6、ectedduringthedifferentiationofNSC.【Methods】Thecerebrumsofratembryoswereseparatedinsterileworkingconditionandculturedinserum-freemedium.Whenthesecondaryneurosphereswereformed,Accutasedigestedthemintosinglecells.Thentheyweredividedintotwoparts,onewasculturedwithsuspensio
7、nneurospheres,theotherwasplatedtoadherentmonolayer.Andtheabilitiesof“stem”and“differentiation”intwomethodswereexamined.NSCwereinducedwithdifferentconcentrations(20,40,80μg/L)ofbrain-derivedneurotrophicfactor(BDNF)todifferentiation,thebestonewasdetermined.Afterinduceddif
8、ferentiationofNSCinthepresenceofBDNF,theexpressionchangesofHES1andMASH1weredetected.【Results】NSCwereobtaininbo