基础医学与临床 ›› 2015, Vol. 35 ›› Issue (3): 387-392.

• 研究论文 • 上一篇    下一篇

组蛋白去乙酰化抑制剂Largazole在抗hUCMSCs衰老中的作用

韩保卫1,王云帅1,闫红杰2   

  1. 1. 郑州大学附属洛阳中心医院
    2. 暨南大学附属第二临床学院
  • 收稿日期:2014-07-30 修回日期:2014-12-11 出版日期:2015-03-05 发布日期:2015-03-03
  • 通讯作者: 王云帅 E-mail:guohuimin3@163.com

The role of histone deacetylase inhibitor largazole prevent aging of hUCMSCs

  • Received:2014-07-30 Revised:2014-12-11 Online:2015-03-05 Published:2015-03-03

摘要: 目的 采用组蛋白去乙酰化抑制剂Largazole作用于人脐带间充质干细胞(hUCMSCs),探讨Largazole在防止hUCMSCs衰老作用和机制。方法 分离、纯化、鉴定人脐带间充质干细胞(hUCMSCs),筛选组蛋白去乙酰化抑制剂largazole扩增hUCMSCs合适的作用浓度。利用合适浓度进行hUCMSCs传代,通过Real-time PCR法检测largazole组P4 、P 8、P12和P16代hUCMSCs干性基因表达水平;通过CHIP检测组蛋白乙酰化抑制剂largazole对hUCMSCs增殖、分化相关基因(Oct4、TERT、OPN)组蛋白H3K9、H3K14的乙酰化程度的影响。结果 hUCMSCs体外扩增随着传代数的增加,增殖能力逐渐下降,干性基因的表达水平也随之降低,并表现出来向成骨方向自主分化。低剂量的Largazole可提高hUCMSCs增殖能力,延缓hUCMSCs的衰老。Largazole主要通过修饰Oct4、TERT、OPN基因启动子区域的组蛋白H3K9/K14ac,使hUCMSCs细胞增殖(Oct4)和端粒酶基因(TERT)mRNA表达增强,成骨分化基因(OPN)的表达减弱。结论 表明组蛋白去乙酰化抑制剂Largazole可以通过修饰hUCMSCs组蛋白H3的乙酰化,在调控MSCs的生物学特性方面起到重要的作用。

关键词: 干细胞, 增值, 生物学特性

Abstract: Objective This research adopt the histone acetylation inhibitor Largazole to treat on human umbilical cord mesenchymal stem cells (hUCMSCs), and discuss the role and molecular mechanism of anti-aging. Methods hUCMSCs were isolated from human Umbilical cords after trypsin digestion, and determined by Flow cytometry analysis. they were cultured with different concentrations of largazole to find the fine cell proliferative concentrations. Passage 4, 8, 12, and 16 cells were subjected to real-time PCR for the change of stem cell gene expression on largazole group. We investigated the effect of largazole, against the histone H3 lysine 9 or 14 (H3K9/K14) acetylation of the gene (TERT, OCT4 and OPN) by CHIP assays. Results hUCMSCs can undergo spontaneous differentiation and aging during expansion. Low concentrate largazole can promote hUCMSCs proliferation and suppresse its spontaneous osteogenic differentiation. Largazole modulates histone H3 acetylation in the TERT, OCT4 and OPN genes; Conclusion our results indicate that histone H3 acetylation, which can be modulated by Largazole, plays a key role in regulating hUCMSCs biological characteristics.

Key words: stem cells, proliferation, biological characteristics