植入后表皮质细胞的表观遗传逆转为多能胚胎干细胞
Siqin Bao1, Fuchou Tang1, Xihe Li2
1Wellcome Trust/Cancer Research UK Gurdon Institute of Cancer and Developmental Biology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QN, UK.
Nature
|October 10, 2009
概括
研究人员通过克服表观遗传障碍,将先进的表皮质细胞重新编程成胚胎干细胞样细胞 (rESCs). 这些重新编程的细胞可以为嵌合体中的组织和生殖细胞做出贡献,这表明多能性重新获得的潜力.
科学领域:
- 发展生物学 发展生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 干细胞生物学 干细胞生物学
背景情况:
- 多能性是在原始的外皮中建立的,并在发育过程中不可逆转地丧失.
- 诸如DNA甲基化和X无活化之类的表观遗传变化会产生阻碍逆转的障碍.
- 表皮质干细胞 (EpiSCs) 与胚胎干细胞 (ESCs) 不同,对LIF-STAT3信号进行耐火.
研究的目的:
- 将先进的表皮质细胞重新编程为类似于ESC的多能状态.
- 研究表观遗传重编程过程及其后果.
- 评估重新编程细胞的发育潜力.
主要方法:
- 从小鼠胚胎 (胚胎日5.5-7.5) 中重新编程先进的表皮质细胞,使用LIF-STAT3信号.
- 分析表观遗传修饰,包括DNA脱甲基和X染色体再激活.
- 评估重编程细胞对仿真体的贡献.
主要成果:
- 在响应LIF-STAT3.3时,成功地将表皮质细胞重编程为ES细胞类细胞 (rESCs).
- 已经证明了表皮质细胞表观遗传记忆的擦除,包括DNA脱甲基和X反应.
- 重新编程的rESCs有助于嵌合体中的体组织和生殖细胞,与表皮质细胞和EpiSCs不同.
结论:
- 信号诱导的表观遗传重编程可以克服发育障碍并恢复多能性.
- 重编程的表皮质干细胞 (rESCs) 恢复了为所有细胞系贡献的能力.
- 这项研究提供了关于多能性维持和重新获得机制的见解.
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