由FUS的种子聚集和传播引起的前性痴呆症样疾病进展
bioRxiv : the preprint server for biology
|June 19, 2024
概括
人类FUS纤维素可以在小鼠大脑中播种FUS蛋白的聚合和传播,模仿神经退行性疾病. 这种类似子的传播,由ALS相关的FUS突变加速,导致FUS蛋白质病变和FTLD类症状.
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
- 生物化学 生物化学
背景情况:
- 包括Fused in Sarcoma (FUS) 在内的RNA结合蛋白与神经退行性疾病有关.
- FUS蛋白质病变是某些家族性肌缩侧面硬化 (ALS) 和零星的前叶退化 (FTLD) 病例的标志.
- 了解FUS聚合和传播的机制对于开发治疗策略至关重要.
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聚合和传播.
- 为了确定与ALS相关的FUS突变是否会影响FUS病理的播种和传播.
- 评估FUS纤维素诱导聚合的病理特征和与疾病相关的后果.
主要方法:
- 在表达人类野生型或突变型FUS的小鼠的大脑中注射人体FUS纤维的焦点注射.
- 使用生化和免疫组织化学技术分析FUS错位化,聚合和传播.
- 对受影响小鼠的认知和行为缺陷的评估.
主要成果:
- 超声波人类FUS纤维素诱导了小鼠中人类FUS的焦点细胞质错位和聚合.
- 随着时间的推移,FUS聚合扩散到远端大脑区域,显示出类似子的传播.
- 与ALS相关的FUS突变与野生型FUS相比,加速了FUS聚合.
- 观察到一种物种障碍,因为人类的FUS纤维在野生类型的老鼠大脑中没有诱导聚合.
- 诱导的FUS聚合物表现出类似FTLD的病理,包括洗剂不溶性和乌比奎丁和p62的积累.
- 在突变FUS小鼠中,FUS纤维素注射加剧了年龄相关的认知和行为缺陷.
结论:
- 焦点播种FUS纤维素开始在大脑中像子一样扩散FUS聚合.
- 这一过程导致FUS蛋白质病变,并加剧FTLD类疾病的进展.
- 这些发现突出了FUS播种和传播在神经退行症中的作用,并为研究FUS相关疾病提供了一个模型.
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