在小鼠大脑中Chd8的分子相互作用突出显示了它在染色质关联RNA处理中的作用
Emily Smith1, Cesar P Canales1,2,3, Mathew W Kenaston4,5
1UC Davis Center for Neuroscience, Davis, CA 95618, USA.
bioRxiv : the preprint server for biology
|December 22, 2025
概括
染色体重塑剂CHD8,神经发育障碍 (NDD) 的风险基因,与RNA处理和细胞骨蛋白相互作用. 这揭示了在染色质关联RNA处理中对剂量敏感的作用,这对大脑发育至关重要.
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:
- CHD8是一种染色体重塑剂,也是神经发育障碍 (NDD) 的模型风险基因.
- 现有研究强调CHD8的核细胞重塑能力,但表明除了染色体调节之外的功能.
- 对于CHD8在大脑功能中的确切作用及其对NDD的贡献仍然不完全理解.
研究的目的:
- 通过使用多式联通的omics方法,全面定义CHD8的交互网络.
- 研究CHD8在大脑中的功能及其在神经发育障碍中的潜在作用.
- 阐明CHD8,RNA处理和染色体调节之间的关系.
主要方法:
- 利用免疫沉,然后进行质谱 (IP-MS) 来识别新生小鼠前脑中的CHD8相互作用蛋白.
- 在HEK293T细胞中使用CHD8-TurboID以验证IP-MS发现并探索线粒作用.
- 进行RNA免疫沉 (RIP) 来评估Chd8与RNA的关联,并识别目标基因.
主要成果:
- 确定了一个复杂的CHD8相互作用网络,用于染色质重塑,RNA处理和细胞骨蛋白.
- 验证了IP-MS特征,并揭示了CHD8在线粒分裂中的作用.
- 证明Chd8与小鼠前脑中的RNA复合,与参与RNA拼接和神经系统发育的基因结合.
- 观察到Chd8结合的mRNA和促进体之间的重叠,并减少了Chd8与RNA剪接因子之间的Chd8相互作用.
结论:
- CHD8的功能超出了染色体重塑的范围,包括在RNA处理中的重要作用.
- CHD8在染色质关联RNA处理中表现出剂量敏感的作用,与神经发育障碍相关.
- 这些发现加深了对CHD8在NDDs背景下的分子机制的理解.
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