导致ALS的C9orf72突变导致核素Nup107的错位化和聚合成压力颗粒
Saygın Bilican1,2, Yara Nabawi1,2, William Hongyu Zhang1,2
1Institute for Integrated Stress Response Signaling, Faculty of Medicine, University Hospital Cologne, Germany.
FEBS letters
|September 2, 2025
概括
研究人员发现,Nup107与受C9orf72基因突变影响的运动神经元中的压力颗粒相互作用,这是肌缩侧面硬化症 (ALS) 的关键因素. 减少Nup107在虫中改善了与ALS相关的症状.
科学领域:
- 神经科学
- 遗传学
- 细胞生物学
背景情况:
- 肌缩侧面硬化 (ALS) 是一种神经退行性疾病,其特征是运动神经元的损失.
- C9orf72基因的六核酸重复扩张是最常见的ALS (C9-ALS) 的遗传原因.
- 压力颗粒 (SG) 参与了C9-ALS的发病.
研究的目的:
- 研究压力颗粒及其成分在C9-ALS病变中的作用.
- 探索G3BP1和C9-ALS运动神经元之间的相互作用.
- 在ALS模型中评估Nup107的治疗潜力.
主要方法:
- 使用患者诱导的多能干细胞 (iPSC) 来产生运动神经元.
- 使用共免疫沉和免疫光显微镜检查蛋白质相互作用.
- 在Caenorhabditis elegans (C. elegans) ALS模型中研究了Nup107的ortolog knockdown的影响.
主要成果:
- 在C9-ALS患者产生的运动神经元中,G3BP1和Nup107之间的相互作用得到了增强.
- 在C9-ALS运动神经元中观察到Nup107与压力颗粒和聚合物的同位化.
- 表明C. elegans中的npp-5 (Nup107 ortholog) 降低改善了与ALS相关的表型,包括寿命和运动缺陷.
结论:
- Nup107是C9-ALS发病的一个关键参与者,它与受影响的运动神经元中的压力颗粒相互作用.
- 针对Nup107可能为C9-ALS提供治疗策略.
- 这些发现为C9-ALS背后的分子机制提供了新的见解.
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