中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (50): 7469-7474.doi: 10.3969/j.issn.2095-4344.2016.50.003

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

5-氮胞苷诱导骨髓间充质干细胞向心肌细胞分化中的作用

贾秀丽1,李昌平2   

  1. 1达州职业技术学院,四川省达州市  635000
    2西南医科大学附属医院,四川省泸州市  646000
  • 修回日期:2016-11-08 出版日期:2016-12-02 发布日期:2016-12-02
  • 通讯作者: 李昌平,硕士,副主任医师,副教授,西南医科大学附属医院,四川省泸州市 646000
  • 作者简介:贾秀丽,女,1981年生,四川省渠县人,讲师,主要从事心血管内科临床研究。
  • 基金资助:

    西南医科大学附属医院基金资助项目(2014-03)

5-Azacytidine induces differentiation of bone marrow mesenchymal stem cells into myocardial cells

Jia Xiu-li1, Li Chang-ping2   

  1. 1Dazhou Vocational and Technical College, Dazhou 635000, Sichuan Province, China
    2Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Revised:2016-11-08 Online:2016-12-02 Published:2016-12-02
  • Contact: Li Chang-ping, Master, Associate chief physician, Associate professor, Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • About author:Jia Xiu-li, Lecturer, Dazhou Vocational and Technical College, Dazhou 635000, Sichuan Province, China
  • Supported by:

    the grant from the Affiliated Hospital of Southwest Medical University, No. 2014-03

摘要:

文章快速阅读:

文题释义:
5-氮胞苷:
是一种胞嘧啶核苷类似物,它能掺入DNA,抑制DNA甲基化转移酶,使DNA去甲基化,重新激活由于过度甲基化而失活的基因。
肌钙蛋白:由T、C、I三亚基构成,和原肌球蛋白一起通过调节钙离子对横纹肌动蛋白ATP酶的活性来调节肌动蛋白和肌球蛋白相互作用。当心肌损伤后,心肌肌钙蛋白复合物释放到血液中,4-6 h后,开始在血液中升高,升高的肌钙蛋白能在血液中保持很长时间。肌钙蛋白I具有高度心肌特异性和灵敏度,所以肌钙蛋白已成为目前最理想的心肌梗死标志物。

 

摘要
背景:
骨髓间充质干细胞在体外经5-氮胞苷诱导后可分化为心肌样细胞这一研究成果使细胞移植治疗心脏疾病成为可能。
目的:探讨不同浓度5-氮胞苷在大鼠骨髓间充质干细胞向心肌细胞分化中的诱导作用。
方法:取第3代骨髓间充质干细胞,分别采用含0,5,10,20 μmol/L 5-氮胞苷的DMEM培养液孵育24 h,去除诱导培养液,用含体积分数为5%胎牛血清的LG-DMEM培养28 d,采用免疫细胞化学方法检测心肌肌钙蛋白I表达。
结果与结论:①第3代骨髓间充质干细胞经5-氮胞苷诱导24 h后出现细胞死亡现象。5,10 μmol/L 5-氮胞苷组细胞死亡相对较少,20 μmol/L 5-氮胞苷组细胞死亡较多;②5 μmol/L 5-氮胞苷组肌钙蛋白I染色阳性率显著低于10 μmol/L 5-氮胞苷组和20 μmol/L 5-氮胞苷组(P < 0.05),10 μmol/L和20 μmol/L 5-氮胞苷组肌钙蛋白Ι阳性率差异无显著性意义(P > 0.05);③结果表明,5-氮胞苷可以在体外诱导大鼠骨髓间充质干细胞向心肌样细胞分化,且10 μmol/L 5-氮胞苷诱导效果较好。

 

 

关键词: 干细胞, 骨髓干细胞, 缺血性心脏病, 5-氮胞苷, 骨髓间充质干细胞, 心肌细胞, 心肌肌钙蛋白I

Abstract:

BACKGROUND: Bone marrow mesenchymal stem cells can be differentiated into myocardial cells induced by 5-azacytidine in vitro, which provides an opportunity for cell transplantation in the treatment of heart disease.
OBJECTIVE: To study the induction effects of 5-azacytidine at different concentrations on the myocardial differentiation of bone marrow mesenchymal stem cells in rats.
METHODS: Passage 3 bone marrow mesechymal stem cells were incubated with DMEM containing 0, 5, 10, 20 μmol/L 5-azacytidine for 24 hours, and then the induced medium was replaced by DMEM containing 5% fetal bovine serum for subsequent 28-day culture. Afterwards, expression of cardiac troponin I was detected by immunocytochemical method.
RESULTS AND CONCLUSION: Cell death occurred at 24 hours after 5-azacytidine induction, which was more obvious in the 20 μmol/L group than the 5 and 10 μmol/L groups. The positive expression of cardiac troponin I was significantly lower in the 5 μmol/L group than the 10 and 20 μmol/L groups (P < 0.05), but there was no significant difference between the 10 and 20 μmol/L groups (P > 0.05). These experimental findings indicate that 5-azacytidine can induce the differentiation of rat bone marrow mesenchymal stem cells into myocardial cells in vitro, and its optimal concentration is 10 μmol/L.

 

 

Key words: Bone Marrow, Mesenchymal Stem Cells, Azacitidine, Myocytes, Cardiac, Cell Differentiation, Troponin I, Tissue Engineering

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