野生类型和ALS突变SOD1的异构聚合
Chad M Dashnaw1, Mayte Gonzalez1, Alireza Abdolvahabi2
1Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76706, United States.
ACS chemical neuroscience
|December 11, 2025
概括
野生类型 (WT) 铜超氧化物脱酶-1 (SOD1) 影响异型SOD1聚合在肌缩侧硬化症 (ALS) 中. WT SOD1通常会减缓突变纤维细胞的形成,但会增加稳定性,但D90A SOD1.1等例外情况.
科学领域:
- 生物化学 生物化学
- 神经科学是一个神经科学.
- 蛋白质错折叠疾病 蛋白质错折叠疾病
背景情况:
- 突变的铜超氧化物脱酶-1 (SOD1) 蛋白与肌缩性侧面硬化症 (ALS) 病原发生有关.
- 野生类型 (WT) SOD1与突变SOD1的协同毒性尚未完全理解.
- 在各种状态下,WT和突变SOD1之间的相互作用可能是毒性的基础.
研究的目的:
- 研究WT SOD1对突变SOD1.1的聚合率和稳定性的影响.
- 为了确定WT SOD1是否影响突变SOD1.1的多种类型的同型纤维化率.
- 为了评估WT和突变SOD1在异体纤维细胞中的近距离和同位.
主要方法:
- 在WT和突变SOD1.1的体外凝聚试验.
- 纤维细胞形成动态 (核和传播) 的分析.
- 纤维热稳定性的评估和交叉连接质谱学.
主要成果:
- WT SOD1通常减缓了突变SOD1纤维细胞核和传播,同时提高了纤维细胞的热稳定性.
- D90A SOD1突变是一个例外,WT SOD1对核化速率的影响最小.
- 交叉播种和质谱学表明,WT和突变SOD1可以在异状纤维细胞内共存和局部化.
结论:
- WT SOD1调节突变SOD1的聚合,通常抑制纤维的形成,但增加稳定性.
- 异状纤维细胞的形成表明,WT SOD1对ALS中突变SOD1毒性的影响是潜在的机制.
- 在异状纤维细胞内的同位化为ALS中的SOD1相互作用提供了结构性的洞察力.
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