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1、Wistar大鼠骨髓間充質(zhì)干細(xì)胞的培養(yǎng)、鑒定和標(biāo)記作者:趙科研柳克祥侯明曉孫江濱吳慧穎李博【摘要】 目的建立Wistar大鼠骨髓間充質(zhì)干細(xì)胞(MSCs)分離、培養(yǎng)的方法,并進(jìn)行鑒定、標(biāo)記。方法采用全骨髓貼壁培養(yǎng)法分離培養(yǎng)大鼠的MSCs。采用相差顯微鏡觀察MSCs的形態(tài)學(xué)特征;流式細(xì)胞儀檢測第3代細(xì)胞表面標(biāo)志抗原CD29、CD44、CD34和CD45的表達(dá)率;電鏡檢查第3代MSCs超微結(jié)構(gòu)。DAPI標(biāo)記MSCs為下一步進(jìn)行體內(nèi)細(xì)胞移植示蹤。結(jié)果原代培養(yǎng)的MSCs于6~8h后貼壁,6d左右形成集落,1
2、4d左右可達(dá)到80%~90%融合。第3代細(xì)胞表面標(biāo)記物CD29,CD44,CD34和CD45的陽性率分別為98.6%,78.2%,0.0%,0.3%。超微結(jié)構(gòu)清晰,可見細(xì)胞器,如線粒體、粗面內(nèi)質(zhì)網(wǎng)和高爾基復(fù)合體,細(xì)胞核呈圓形或不規(guī)則,可見較多微絨毛。DAPI可良好標(biāo)記MSCs細(xì)胞核,呈藍(lán)色熒光。結(jié)論采用全骨髓貼壁培養(yǎng)的方法能夠成功分離和培養(yǎng)大鼠的MSCs,在第3代可獲得高純度MSCs。DAPI可以作為一種示蹤劑標(biāo)記MSCs。9【關(guān)鍵詞】細(xì)胞培養(yǎng);間充質(zhì)干細(xì)胞;種子細(xì)胞;示蹤劑【Abstract】Ob
3、jectiveToestablishamethodforisolationandcultureofbonemarrowmesenchymalstemcells(MSCs)fromWistarratsinvitro,andtoidentifycharacteristicofthecellsandtolabelthemaftercultureexpansion.MethodsMSCswereisolatedandcultivatedfromthebonemarrowofWistarratsbyadher
4、entmethod.ThemorphologyofMSCswasobservedunderphasecontrastmicroscope.TheexpressionofCD29,CD44,CD34andCD45ofthethirdgenerationcellswereanalyzedbyflowcytometry.ElectronmicroscopicfeatureswerealsoobservedandMSCswerelabeledbyDAPI.ResultsAfter6to8hprimarycu
5、lture,MSCsadheredtoplasticsurfaceoftheculturedish. About6dlater,thecellsproliferatedincolonies.PrimaryMSCsreached80%~90%ofconfluencein14dapproximately.ThepositiveratesofCD29,CD44,CD34,andCD45inMSCsatthirdgenerationwere98.6%,78.2%,0.0%,and0.3%respective
6、ly.UndertheelectronmicroscopeMSCshadplentifulcytoplasmwithmitochondriaroughendoplasmicreticulaandGolgicomplexes.Theirnucleiwereroundorirregularandtherewereplentyofmicrovillionthesurface.AlloftheMSCsafterlabelingbyDAPIshowedbluefluorescencebyfluoroscope
7、.ConclusionsMesenchymalstemcells9canbesuccessfullyisolatedandcultivatedbyadherentmethod.AndhigherpurityMSCscanbepickedupaftercultureexpansionatP3.DAPIcanbeaneffectivetraceragenttolabelMSCs.【Keywords】Cellculture;Mesenchymalstemcells;Seedcells;Traceragen
8、t 骨髓間充質(zhì)干細(xì)胞(mesenchymalstemcells,MSCs)是一類具有自我更新和多向分化潛能的非造血干細(xì)胞,可以向骨細(xì)胞、軟骨細(xì)胞、脂肪細(xì)胞、干細(xì)胞、肌細(xì)胞、神經(jīng)細(xì)胞以及心肌細(xì)胞分化〔1,2〕,具有高度可塑性,易于體外擴(kuò)增,因其來源充足、取材方便,體外增殖能力相對較強(qiáng),而且在異體移植中排斥反應(yīng)小,被認(rèn)為是組織工程和基因工程的理想種子細(xì)胞,為心血管疾病、神經(jīng)疾病和骨關(guān)節(jié)疾病的治療提供了一條全新的治療方案。本文在總結(jié)貼壁分離法培養(yǎng)MSCs的基礎(chǔ)上,優(yōu)化MS