通过表观遗传足迹剖析神经分化调节网络
Michael J Ziller1,2,3, Reuven Edri4, Yakey Yaffe4
1Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA.
Nature
|December 24, 2014
概括
人类多能干细胞模拟神经发育,揭示了原生细胞分化的关键调节者. 这项研究确定了控制细胞命运决策和神经谱系发育期间表观遗传变化的关键因素.
科学领域:
- 干细胞生物学 干细胞生物学
- 神经科学是一个神经科学.
- 发育生物学是发展生物学.
背景情况:
- 人类多能干细胞 (hPSCs) 对于在体外早期神经发育的建模至关重要.
- 通过HES5进行痕信号传递,对于神经前代细胞的维护至关重要.
- 了解神经母细胞调节是再生医学的关键.
研究的目的:
- 分析从hPSCs神经前代细胞分化过程中的转录和表观基因组变化.
- 模拟细胞命运决策,包括皮质神经干细胞和祖细胞的规范,扩张和模式.
- 确定管理阶段特定差异化的监管机制.
主要方法:
- 从一个HES5::eGFP记者hESC线的六个连续的神经原生细胞阶段的转录和表观基因组分析.
- 开发一个计算框架,从表观遗传景观改造中推断关键调节因素.
- 推断调节者的验证,使用聚合的短毛RNA选.
主要成果:
- 连续的神经原生细胞阶段的详细转录和表观基因组图被生成.
- 一个计算框架成功地确定了细胞状态转换的关键调节者.
- 改进了转录因子结合部位的表观遗传原始化,表明由结合的核心和特定阶段因子调解.
结论:
- 开发的hPSC系统有效地模拟皮质神经干细胞和祖细胞本体发生.
- 这项研究为剖析分化中的调节回路提供了一个可概括的框架,可以在神经谱系之外应用.
- 确定了神经前体细胞分化和表观遗传修饰的关键调节者.
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