转录调节剂和Ptbp1通过Rbfox1/2/3在发育中的新皮质中进行细胞类型特异分离
Xiangbin Ruan1, Kaining Hu1, Yalan Yang1
1Department of Human Genetics, The University of Chicago, Chicago, Illinois 60637.
概括
主拼接调节器,如Rbfox蛋白质,控制发育中的大脑中的基因表达. 它们的活动通过改变关键转录因子的拼接模式来影响神经元发育.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 发育中的大脑中替代拼接的复杂机制,特别是拼接调节器如何相互作用并影响转录因子,仍然在很大程度上是未知的.
- 了解细胞类型特定的基因表达对于破译新皮质的发育过程至关重要.
研究的目的:
- 研究在新皮层发育过程中拼接调节器和转录因子之间的交叉对话.
- 确定转录调节器中的差异拼接的程度及其功能后果.
主要方法:
- 细胞类型特定的RNA测序 (RNA-Seq) 在正在发育的新皮质上进行.
- 分析了Rbfox基因 (Rbfox1/2/3) 的表达模式及其对转录调节者的替代拼接的影响.
- 通过基因操纵和迁移研究,评估了Rbfox剥离和特定拼接事件的功能后果.
主要成果:
- 观察到Rbfox1/2/3基因的可变表达,与转录调节器中的丰富替代拼接相关.
- 发现Rbfox蛋白诱导了Meis2和Ted1等转录调节器中的神经元拼接事件,并影响了Ptbp1拼接.
- 同时切除Rbfox1/2/3破坏了神经元异型表达,损害了辐射神经元迁移,并揭示了Meis2异型的细胞类型特异性功能.
结论:
- 转录调节器在发育中的新皮质中经历细胞类型之间的差异拼接,由像Rbfox.fox这样的拼接因子主导.
- 转录因子的拼接调节在神经元分化和大脑发育过程中的迁移中起着关键作用.
- 该研究强调了一种新的基因调节层,通过转录因子的替代拼接影响新皮层发育.
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