資源描述:
《cxcr4基因轉(zhuǎn)染的豬bmscs體外誘導(dǎo)分化為心肌樣細(xì)胞的實驗研究》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、CXCR4基因轉(zhuǎn)染的豬BMSCs體外誘導(dǎo)分化為心肌樣細(xì)胞的實驗研究作者:陳中璞,李擁軍,姚玉宇,蔣益波,錢琪,潘嘯東【摘要】目的:探討基質(zhì)細(xì)胞衍生因子1(SDF1)受體CXCR4基因轉(zhuǎn)染的豬骨髓間充質(zhì)干細(xì)胞(BMSCs)體外誘導(dǎo)分化為心肌樣細(xì)胞的可行性。方法:按照Nance方法培養(yǎng)BMSCs,轉(zhuǎn)染帶熒光的CXCR4基因,流式細(xì)胞儀檢測轉(zhuǎn)染后BMSCs的細(xì)胞周期,用5氮胞苷(5aza)誘導(dǎo),并行結(jié)蛋白、肌球蛋白重鏈、心肌特異性肌鈣蛋白I免疫組化鑒定。對照組為未轉(zhuǎn)染CXCR4基因的BMSCs。結(jié)果:體
2、外培養(yǎng)的原代BMSCs10~14d達到融合,CXCR4基因轉(zhuǎn)染后的BMSCs能成功表達CXCR4,轉(zhuǎn)染前后細(xì)胞周期無明顯改變。與對照組相同,經(jīng)5aza刺激后,部分BMSCs成梭形,結(jié)蛋白、肌球蛋白重鏈、心肌特異性肌鈣蛋白I免疫組化染色均為陽性。結(jié)論:CXCR4基因轉(zhuǎn)染的豬BMSCs在體外條件下生長穩(wěn)定,傳代后仍保持未分化狀態(tài),有分化成心肌樣細(xì)胞的潛能?!娟P(guān)鍵詞】基質(zhì)細(xì)胞衍生因子1;CXCR4基因;骨髓間充質(zhì)干細(xì)胞;體外誘導(dǎo);心肌樣細(xì)胞 [Abstract]Objective:Toinvestigat
3、ethepossibilityofinducingporcinebonemarrowmesenchymalstemcells(BMSCs)13whichweretransfectedbyCXCR4genefirst,theacceptorofSDF1,todifferentiateintocardiomyocyteslikecellsinvitro.Methods:BMSCswereisolatedfrombonemarrowandpurifiedbycentrifuge.Theproliferati
4、onandgrowthcharacteristicswereobservedinprimaryandpassageculture.BMSCsweretransfectedbyCXCR4gene,thenanalyzedcellcyclebyflowcytometer.Afterbeingcoculturedwith5azacytidinefor24h,theculturedcellswereevaluatedbyimmunohistochemicalstains.ThecontrolgroupwasB
5、MSCswithoutCXCR4gene.Results:Thecellswerefusedinsinglelayerafterplatingfor10~14days.BMSCswhichweretransfectedcouldexpressCXCR4successfully,andthecellcycledidntchanged.Thesameasthecontrolgroup,afterbeingcoculturedwith5azacytidine,someoftransfectedBMSCsb
6、ecamespindlelikeandformedanetworkofmyotubule.MyotubularcellswerefoundtobestainedwithpositivelyMHC,desminandTnI.Conclusion:PorcineBMSCswhichweretransfectedbyCXCR4genefirstcanbeisolatedfrompostnatalbonemarrowthroughtheiradherentability,andcanbeinducedtodif
7、ferentiateintocardiomyocyteslikecellsinvitro. [Keywords]stromalcellderivedfactor1;CXCR4gene;bonemarrowmesenchymalstemcells;induceinvitro;13cardiomyocyteslikecells 心肌壞死是心血管系統(tǒng)的常見病,其顯著特征是功能性心肌細(xì)胞大量死亡。一般認(rèn)為,成熟的心肌細(xì)胞是終末分化細(xì)胞,缺乏再生能力[1-2]。有研究[3]表明,少數(shù)成體心肌細(xì)胞在終末分化
8、之后還具有分裂能力,但由于數(shù)量極少,不能達到修復(fù)損傷心肌的目的。因此,增加心肌細(xì)胞或心肌樣細(xì)胞的數(shù)量可以改善此類病人的心功能,細(xì)胞移植成為治療心肌壞死的新策略。然而單純細(xì)胞移植的效率卻不高[4-5],為提高移植效率,人們的目光轉(zhuǎn)移到在干細(xì)胞的動員、歸巢和分化過程中發(fā)揮重要作用的細(xì)胞因子上。其中,基質(zhì)細(xì)胞衍生因子1(SDF1)與其特異性受體CXCR4相互作用,參與到干細(xì)胞動員、歸巢、黏附、存活增殖的各個步驟,在心臟的細(xì)胞治療