压力颗粒组装扰乱了核细胞质运输
Ke Zhang1, J Gavin Daigle1, Kathleen M Cunningham2
1Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA; Brain Science Institute, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA.
Cell
|April 10, 2018
概括
细胞压力通过形成压力颗粒来破坏神经退行性疾病中的核细胞质运输. 例如通过向ATAXIN-2来抑制这些颗粒,可以防止传输缺陷和神经退行.
科学领域:
- 神经科学
- 分子生物学
- 遗传学
背景情况:
- 核细胞质运输缺陷是肌缩侧面硬化症 (ALS) 和前性痴呆症 (FTD) 的关键,通常与C9ORF72重复扩张有关.
- 其他神经退行性疾病中的蛋白质聚合也表明核细胞质运输被破坏是共同的致病机制.
研究的目的:
- 在C9ORF72介导的ALS/FTD中,研究细胞应激如何影响核细胞质运输.
- 确定压力颗粒和神经退化中的核细胞质运输缺陷之间的分子联系.
主要方法:
- 在细胞应激条件下检查核细胞质运输因子的局部化.
- 研究了压力颗粒在核细胞质运输中断中的作用.
- 在C9ORF72-ALS/FTD模型中评估了抑制压力颗粒组装的治疗潜力 (例如通过Ataxin-2敲击).
主要成果:
- 细胞压力导致关键的核细胞质运输因子积聚在压力颗粒中.
- 压力颗粒直接影响核细胞质运输.
- 通过抑制压力颗粒的形成,特别是通过降低Ataxin-2水平,可以改善C9ORF72-ALS/FTD中的核细胞质运输缺陷和神经退行.
结论:
- 在C9ORF72介导的ALS/FTD中,压力颗粒组合与核细胞质运输功能障碍之间建立了直接联系.
- 结果强调压力颗粒是ALS/FTD和其他可能涉及蛋白质压力的神经退行性疾病的关键治疗点.
- 证明针对阿塔克辛-2可以减轻C9ORF72-ALS/FTD的主要病理特征.
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