胚胎干细胞分化的内在转变为神经前代
Daisuke Kamiya1, Satoe Banno, Noriaki Sasai
1Organogenesis and Neurogenesis Group, RIKEN Center for Developmental Biology, Kobe 650-0047, Japan.
Nature
|February 18, 2011
概括
指蛋白Zfp521本质上驱动胚胎干细胞 (ES) 神经分化. 它的表达对于将表皮质细胞转化为神经外皮细胞前代而无需外部信号至关重要.
科学领域:
- 发展生物学 发展生物学
- 干细胞生物学 干细胞生物学
- 分子神经科学 分子神经科学
背景情况:
- 胚胎干 (ES) 细胞分化为神经细胞是一个基本的过程.
- 控制内在神经命运决定的细胞内机制在很大程度上是未知的.
- 了解这些机制对于控制再生医学的干细胞分化至关重要.
研究的目的:
- 阐明控制小鼠ES细胞内在神经分化的细胞内因素.
- 确定从表皮质转化为神经外皮原体的关键蛋白质.
- 研究Zfp521在启动神经命运中的作用.
主要方法:
- 在ES细胞分化过程中对Zfp521表达的分析.
- 功能获取研究涉及强制Zfp521表达.
- 使用Zfp521消耗的功能丧失研究.
- 研究Zfp521与p300等联合激活剂的相互作用.
- 早期神经基因激活的评估.
主要成果:
- 在没有BMP4.4的情况下,Zfp521在ES细胞分化过程中内在诱导.
- 强迫Zfp521表达促进神经转换,即使存在BMP4.
- Zfp521的枯竭阻止了神经转换,导致细胞在表皮质细胞阶段停止.
- Zfp521通过共同激活器p300直接激活神经基因.
结论:
- Zfp521对于ES细胞的内在神经分化至关重要且足够.
- 细胞内在表达和Zfp521的激活器功能对于表皮质细胞向神经外皮原体的过渡至关重要.
- Zfp521代表了一个关键的分子开关,用于启动干细胞中的神经命运决定.
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