结合细胞组的故障会导致神经发育障碍,并具有重叠的特征
Dong Li1,2,3, Qin Wang4, Allan Bayat5,6,7
1Center for Applied Genomics, and.
The Journal of clinical investigation
|November 14, 2023
概括
三种拼接因子的致病变体U2AF2,PRPF19和RBFOX1,导致神经发育障碍 (NDD). 这项研究揭示了对人类大脑发育和功能至关重要的遗传网络.
科学领域:
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- 预mRNA剪接对神经功能至关重要,但其在神经发育障碍 (NDD) 中的作用尚未完全理解.
- 拼接机械的调节不良越来越多地与神经系统缺陷有关.
研究的目的:
- 调查结合体子单元在NDD中的作用.
- 识别与NDD相关的拼接因子中的遗传变异.
- 阐明在大脑发育中的拼接因子功能障碍背后的分子机制.
主要方法:
- 在患有NDD的个体中识别和描述U2AF2和PRPF19的de novo变异.
- 使用模型基质和人类多能干细胞衍生的神经元的功能性测试.
- 利用Drosophila melanogaster模型来评估正义基因变异对神经发育和行为的影响.
- 转录组概况和临床外体组数据的重新分析.
主要成果:
- 在U2AF2和PRPF19中确定了许多与NDD相关的de novo误解变异.
- 证明U2AF2变种会损害人类神经元的拼接并减少神经元发生.
- 在U2af50和Prp19中功能丧失的多索菲拉模型表现出致死性,异常的大脑模式和社会缺陷.
- 确定了RBFOX1作为第三个NDD引起的拼接因子,确定了显示功能丧失的变体.
结论:
- U2AF2,PRPF19和RBFOX1被认为是导致NDD的新型基因.
- 这些发现建立了一个基因网络,具有对人类大脑发育至关重要的层次结构.
- 这项研究强调了mRNA前拼接在神经发育中的关键作用.
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