由FUS的种子聚集和传播引起的前性痴呆症样疾病进展
Sonia Vazquez-Sanchez1, Britt Tilkin2, Fatima Gasset-Rosa1,3
1Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, 92093, USA.
Molecular neurodegeneration
|June 11, 2024
概括
人类化在肉瘤 (FUS) 蛋白质聚合物可以在大脑中像子一样传播,导致神经退行性疾病. 这项研究表明,FUS播种导致FTLD类病理,并使小鼠的认知缺陷恶化.
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
- 蛋白质病症研究 蛋白质病症研究
背景情况:
- RNA结合蛋白,包括化在肉瘤 (FUS) 中的结合蛋白,都与神经退行性疾病有关.
- FUS蛋白质病变是某些肌缩侧面硬化 (ALS) 和前叶退化 (FTLD) 病例的标志.
研究的目的:
- 在小鼠模型中,研究是否超声波的人类FUS纤维素可以诱导FUS聚合和疾病病理.
- 为了确定FUS聚合是否通过子类机制传播.
- 评估FUS种植对认知和行为缺陷的影响.
主要方法:
- 在表达人类FUS (野生型或突变型) 的小鼠的大脑中注射人体FUS纤维的焦点注射.
- 对FUS错位,聚合,洗剂不溶性和与病理标志物 (ubiquitin,p62) 共同局部的分析.
- 在注射FUS的小鼠中评估认知和行为缺陷.
主要成果:
- 人类FUS纤维素诱导着焦点FUS聚合和错位,这些聚合和错位扩散到远端大脑区域.
- 与ALS相关的FUS突变与野生类型FUS相比加速聚合.
- 一种物种障碍阻止了野生类型老鼠大脑中的人类FUS聚合.
- 诱导聚合物显示出类似FTLD的特征,包括洗剂不溶性和粉样类沉积物,但不是TDP-43.3.
- 在突变的FUS小鼠中,FUS播种加剧了年龄相关的认知和行为缺陷.
结论:
- 种植FUS纤维素会引发FUS蛋白质病变,并在大脑中发生类似子的扩散.
- FUS聚合有助于FTLD类病理和疾病进展.
- 该模型提供了关于FUS相关神经退行变化的机制的见解.
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