TDP-43 聚合物播种破坏自我调节并导致 TDP-43 功能障碍
Lohany Dias Mamede1, Miwei Hu2, Amanda R Titus1
1Edward Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis MO 63104, USA.
bioRxiv : the preprint server for biology
|February 24, 2025
概括
在神经退行性疾病中,TDP-43聚合导致其错位和功能丧失. 破坏TDP-43自我调节会放大这种有毒聚合过程,可能导致疾病病理.
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
- 遗传学 是一个遗传学.
背景情况:
- TDP-43蛋白聚合,错位化和功能障碍是神经退行性疾病的关键特征.
- 了解TDP-43聚合及其功能后果之间的相互作用对于阐明疾病机制至关重要.
研究的目的:
- 调查TDP-43聚合,细胞错位和功能丧失之间的联系.
- 探索TDP-43自我调节在聚合诱导病理学背景下的作用.
- 确定调节TDP-43聚合和相关细胞功能障碍的因素.
主要方法:
- 在细胞模型中使用子样播种诱导TDP-43聚合.
- 评估TDP-43的核定位,功能和基因表达.
- 分析了TDP-43控制的密码外基子的激活.
- 调查播种对TDP-43自我调节的影响.
- 检查相互作用的蛋白质和病理相关因素的同位化,如阿塔辛2.
主要成果:
- TDP-43的类播种导致其逐渐失去核定位和功能.
- 受累积影响的细胞表现出DNA损伤和TDP-43标的改变表达.
- 蛋白质治疗种子诱导TDP-43受控的细胞中的密码外子激活,包括人类神经元.
- 聚合种植会影响TDP-43的自我调节,破坏TDP-43的恒温.
- ATAXIN 2与TDP-43的含有物共局并影响播种诱导的聚合,而正常的TDP-43相互作用体则没有.
结论:
- TDP-43聚合,错位和功能丧失是相互关联的病理事件.
- 破坏TDP-43自我调节会产生一个有毒的前循环,加剧聚合.
- 这种自我调节的破坏可能是将TDP-43聚合与神经退行症中的病理后果联系起来的中心机制.
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