基础医学与临床 ›› 2007, Vol. 27 ›› Issue (2): 157-160.

• 研究论文 • 上一篇    下一篇

人骨髓间充质干细胞向心肌样细胞分化

曹欣欣 戴玉华 张抒扬   

  1. 北京协和医院心脏内科 北京协和医院心脏内科 北京协和医院心脏内科
  • 收稿日期:2005-12-12 修回日期:2006-06-30 出版日期:2007-02-25 发布日期:2007-02-25
  • 通讯作者: 曹欣欣

Differentiation of human mesenchymal stem cells into cardiomyocyte-like cells

  

  • Received:2005-12-12 Revised:2006-06-30 Online:2007-02-25 Published:2007-02-25

摘要: 目的 讨论小型猪心肌细胞(CMs)裂解液对人骨髓间充质干细胞(MSCs)的体外诱导分化作用。方法 用5-aza、小型猪CMs裂解液两种方法体外诱导人MSCs的分化,单纯培养基(DMEM)培养为对照组,观察细胞形态改变。用细胞免疫化学、免疫荧光法检测MSCs的a-actin、cTnT、Cx43和CD31的表达,MTT法测定细胞增殖。结果 小型猪CMs裂解液诱导人MSCs所得心肌样细胞(CLCs)表达cTnT、Cx43和CD31;5-aza诱导组MSCs表达cTnT和Cx43,不表达CD31;5-aza培养初期对MSCs的增殖具有明显的抑制作用,CMs裂解液促进MSCs的增殖。结论 小型猪CMs裂解液培养基可以诱导人MSCs分化为心肌样细胞及内皮样细胞,并且具有很强的促细胞增殖作用,优于目前广泛研究的肌细胞诱导分化剂5-aza。本研究为大规模诱导人MSCs向CMs分化创造了条件。

Abstract: Objectives To prove the effects of porcine CMs extract on the differentiation of human MSCs. Methods The MSCs isolated from human bone marrow were induced by two different culture systems: 5-aza and CMs extract medium. Immunostaining against α-actin,cTnT,Cx43 and CD31 was performed. The effects of 5-aza and CMs extract on the proliferation of MSCs were analyzed by MTT method. Results MSCs cultured in CMs extract medium expressed cTnT,Cx43 and CD31; MSCs induced by 5-aza expressedcTnT and Cx43, but did not express CD31; 5-aza inhibited MSCs proliferation, whereas CMs extract stimulated MSCs proliferation. Conclusions The method of adding porcine CMs extract into the culture system can induce human MSCs to differentiate into CLCs and endothelial-like cells. CMs extract has significant effects on cell proliferation. This method with few side effects on MSCs is better than that of the well-established inducer 5-aza.