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中国临床药理学与治疗学 ›› 2007, Vol. 12 ›› Issue (4): 401-404.

• 基础研究 • 上一篇    下一篇

人骨髓间充质干细胞分化为心肌样细胞的研究

李宁1, 侯相麟2   

  1. 1大连血液中心, 大连116001, 辽宁,
    2兰州大学第一医院血液科, 兰州730000, 甘肃
  • 收稿日期:2006-01-14 修回日期:2006-01-14 发布日期:2020-10-30
  • 通讯作者: 侯相麟, 男, 教授, 主任医师, 硕士生导师, 研究方向:骨髓间充质干细胞的多向分化。Tel:13209315286 E-mail:houxianglin @hotmail
  • 作者简介:李宁, 女, 在读硕士, 研究方向:间充质干细胞的多向分化。Tel:13514246925 E-mail:ningjie1234 @sina.com

Studies on human mesenchymal stem cells differentiation into cardiomyocytes in vitro

LI Ning1, HOU Xiang-lin2   

  1. 1Dalian Centre of Hematology;Dalian 116001, Liaoning, China;
    2Department of Hematology, the First Hospital of LanzhouUniversity, Lanzhou 730000, Gansu, China
  • Received:2006-01-14 Revised:2006-01-14 Published:2020-10-30

摘要: 目的 研究人骨髓间充质干细胞(hMSCs) 在体外分离纯化、培养扩增和向心肌样细胞诱导分化的条件。 方法 体外分离培养hMSCs, 纯化传代至第三、四代, 加入不同浓度5-氮杂胞苷(5-Aza) 进行不同时间的孵育, 用MTT 测定细胞的生长活性, 确定最佳的浓度和孵育时间。4 周后行电镜, 免疫组化染色及逆转录-聚合酶链式反应(RT-PCR) 检测。 结果 诱导后细胞呈心肌样细胞改变, 电镜下可见肌丝形成, 免疫组化显示部分细胞胞浆α-横纹肌肌动蛋白(α-sarcomeric actin) 、肌钙蛋白-T (troponin-T) 阳性。RT-PCR 检测显示心肌特异转录因子GATA-4 、Nkx2.5 有表达。 结论 hMSCs 是骨髓来源的具有多向分化潜能的干细胞, 在5-Aza 的诱导下可向心肌样细胞分化, 可成为心肌损伤移植治疗的理想细胞材料。

关键词: 人骨髓间充质干细胞, 分化, 心肌细胞, 体外

Abstract: AIM: To study the mechanisms of the human mesenchymal stem cells differentiating into cardiomyocytes induced by 5-azacyditine. METHODS: The mesenchymal stem cells were separated and purified in vitro, then given 5-azacyditine at three concentrations and at different incubation time.The vitality of the mesenchymal stem cells were assayed with the methylthiazolyl tetrazolium method in order to estimate the best concentration and incubation time.The induced cells were checked by transmission electron microscope, immunohistochemistry and RT-PCR. RESULTS: The induced cells changed their morphology to that of cardiomyocyte type. Transmission electron microscope revealed striation.Some cells were positive expression of α-sarcomeric actin, troponin-T and cardiac specific transcript factors GATA-4, Nkx2.5. CONCLUSION: The huaman bone marrow-derived mesenchymal stem cells possesses the multiple differentiation potential and can be induced to cardiomyocytes by 5-azacyditine in vitro.

Key words: human mesenchymal stem cells, differentiation, cardiomyocyte, in vitro

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