PTBP2衰减通过促进神经元基因的替代拼接来促进纤维细胞转化为神经元的转化
Binglin Zhu1, Emily Fisher2, Li Li2
1Veterans Affairs Western New York Healthcare System, Buffalo, NY 14215, USA; Department of Physiology and Biophysics, State University of New York at Buffalo, Buffalo, NY 14203, USA.
Stem cell reports
|October 13, 2023
概括
直接将皮肤细胞转化为神经元是低效的. 这项研究表明,减少PTBP2蛋白通过促进神经元特异性基因拼接,与RBFOX3 (NeuN) 合作,增强了这一过程.
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
- 细胞生物学 细胞生物学
背景情况:
- 直接将体细胞转化为神经元,为再生医学提供了一个有前途的途径.
- 然而,这种转变差异化过程的效率和潜在机制仍然不完全理解.
研究的目的:
- 阐明控制人类皮肤纤维细胞直接转化为神经元的分子机制.
- 确定关键的调节者,特别是RNA剪接因子,以提高转差异化效率.
主要方法:
- 在人类皮肤纤维细胞中利用了PTBP2和RBFOX3 (NeuN) 的淘汰和过度表达策略.
- 使用了一种转录因子 (ASCL1,MIR9/9*-124,p53shRNA) 的尾酒来诱导神经元转分化.
- 进行纵向RNA测序以分析基因表达和替代拼接事件.
主要成果:
- 抑制PTBP2显著提高了纤维细胞到神经元转差的效率,产生了主要的GABAergic神经元.
- RBFOX3 (NeuN) 被确定为一个关键因素;它的敲击取消了转差,而它的过度表达增强了它.
- PTBP2减弱促进了神经元特异性替代拼接在神经元功能至关重要的基因中,这种效应由RBFOX3水平调节.
结论:
- 在神经元分化过程中,PTBP2在调节神经元分化过程中的替代拼接中起着至关重要的作用.
- RBFOX3与PTBP2协同作用,促进神经元特定的替代拼接,从而增强纤维细胞到神经元的直接转换.
- 这项研究揭示了一种涉及PTBP2和RBFOX3在优化直接神经元重编程的新机制.
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