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从神经干细胞向神经元进展的H3K27脱甲基酶的SMRT介导的抑制

Kristen Jepsen¹, Derek Solum, Tianyuan Zhou

¹Howard Hughes Medical Institute, Department of Medicine, University of California, San Diego, School of Medicine, 9500 Gilman Drive, La Jolla, California 92093, USA. kjepsen@ucsd.edu

|October 12, 2007

概括

核受体共抑制剂2 (SMRT) 对于维持神经干细胞状态和前脑发育至关重要. 它通过抑制JMJD3基因来防止过早的神经元分化.

科学领域:

神经科学是一个神经科学.
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.

背景情况:

转录因子对于神经干细胞的维护至关重要.
核心抑制剂,如SMRT (核受体共抑制剂2) 在神经发生过程中的作用在很大程度上是未知的.
之前的研究指出SMRT和NCoR表达,但没有SMRT在神经发生的特定功能.

研究的目的:

研究SMRT核心压缩剂在神经干细胞维护和早期神经生成中的作用.
确定SMRT在前脑发育中的作用.
阐明SMRT影响神经元分化的分子机制.

主要方法:

在SMRT基因被删除的小鼠中分析基因表达标记物.
使用隔离的皮层原生细胞进行的研究.
研究SMRT对视网膜酸和Notch信号通路的调节.

主要成果:

SMRT对于前脑发育和维持神经干细胞状态至关重要.
SMRT在视网膜酸和依赖诺奇的前脑发育中起着功能性作用.
在原始细胞中,SMRT阻止了视网膜酸受体依赖的神经元分化.
SMRT抑制了JMJD3,一种可以激活神经原生程序的脱甲基酶.

结论:

SMRT是神经干细胞维护和前脑发育的关键调节者.
SMRT通过抑制JMJD3而起作用,从而控制神经性基因的表达.
这些发现凸显了SMRT在预防神经元过早分化的重要性.

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