Wdr5通过胚胎干细胞核心转录网络调解自我更新和重编程
Yen-Sin Ang1, Su-Yi Tsai, Dung-Fang Lee
1Black Family Stem Cell Institute, Mount Sinai School of Medicine, New York, NY 10029, USA. yen-sin.ang@mssm.edu
Cell
|April 12, 2011
概括
WD重复域5 (Wdr5) 通过与Oct4.4相互作用来调节胚胎干细胞的自我更新. 这种相互作用对于维持多能性和将体细胞重新编程成诱导多能干细胞至关重要.
科学领域:
- 表观遗传学和基因调控
- 干细胞生物学 干细胞生物学
- 分子生物学分子生物学
背景情况:
- 胚胎干细胞的自我更新依赖于复杂的转录和染色质修饰网络.
- 这些网络及其介导因素之间的功能相互作用尚未完全理解.
研究的目的:
- 研究WD重复域5 (Wdr5) 在ES细胞自我更新中的作用.
- 为了阐明Wdr5和多能性因子之间的相互作用.
- 了解维持多能性和重编程的合作机制.
主要方法:
- 对Wdr5表达与未分化状态的相关性分析.
- 证明Wdr5与Oct4.4的相互作用.
- 全基因组蛋白质定位和转录组分析.
- 对诱导多能干细胞 (iPS) 形成的Wdr5要求的评估.
主要成果:
- Wdr5与不分化状态正相关,并调节ES细胞自我更新.
- Wdr5与多能性转录因子Oct4.4相互作用.
- 在Oct4和Wdr5.5之间观察到重叠的基因调节功能.
- Oct4-Sox2-Nanog 电路和 Trithorax 组 (trxG) 蛋白在调节自我更新基因方面进行合作.
- 对于有效的iPS细胞生成,Wdr5是必不可少的.
结论:
- Wdr5是ES细胞自我更新和多能性的关键调节者.
- 一个涉及trxG成员的综合模型,如Wdr5和多能因子,维持ES细胞的身份.
- Wdr5在体细胞重编程到iPS细胞中起着至关重要的作用.
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