与ALS相关的辅助器DNAJC7通过调节HSF1活动来调节神经保护,防止蛋白质毒性压力
bioRxiv : the preprint server for biology
|December 9, 2024
概括
在DNAJC7中发生的突变,热冲击蛋白的辅导体,导致罕见的ALS. DNAJC7损失会影响运动神经元应激反应和RNA处理,这表明HSF1是ALS的治疗点.
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 遗传学 是一个
背景情况:
- 肌缩侧面硬化症 (ALS) 涉及运动神经元退化和蛋白质聚合.
- 热冲击蛋白 (HSP) 维持蛋白质的平衡.
- DNAJC7突变与罕见的ALS形式有关,但机制尚不清楚.
研究的目的:
- 研究DNAJC7在人类运动神经元 (MN) 功能和ALS发病过程中的作用.
- 确定DNAJC7相互作用蛋白及其对细胞应激反应的影响.
主要方法:
- 质谱测量用于识别人类MNS中的DNAJC7相互作用体.
- 诱导多能干细胞 (iPSCs) 分化为具有DNAJC7突变的MN.
- 分析蛋白质不可溶性,RNA代谢和应激反应途径 (HSF1).
主要成果:
- DNAJC7互动体中含有丰富的RNA结合蛋白 (RBPs) 和伴侣蛋白.
- 与ALS相关的DNAJC7突变 (R156X) 导致HNRNPU不可溶性和RNA代谢缺陷.
- DNAJC7 缺陷增加了 MN 通过受损的 HSF1 途径对蛋白质毒性压力的敏感性.
- HSF1表达拯救了DNAJC7突变MN;ALS神经元显示HSF1通路基因表达减少.
结论:
- DNAJC7对于人类MN的HNRNPU功能和应激反应至关重要.
- HSF1通路对于保护MNs免受ALS中的蛋白质毒性压力至关重要.
- HSF1代表了ALS的潜在治疗标.
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