c-Src通过酸化E3结合酶Traf6来调节δ-分泌酶激活和截断的Tau产生
Yanli Jiang1, Longfei Li1, Ruozhen Wu1
1Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Education Ministry/Hubei Province of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
这项研究揭示了c-Src如何通过化Traf6来激活阿斯巴拉基尼尔内酶 (AEP),从而导致阿尔茨海默氏症等神经退行性疾病中异常的Tau蛋白积累.
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:
- 异常的陶蛋白积累是神经退行性疾病的核心.
- 被阿斯巴拉基尼尔内酶 (AEP) 切割的截断的Tau,加剧了Tau的病理.
- 了解AEP激活机制对于治疗开发至关重要.
研究的目的:
- 为了阐明AEP激活的调节机制.
- 研究AEP,c-Src和Traf6.6之间的相互作用.
- 探索针对陶病症中c-Src-Traf6通路的治疗潜力.
主要方法:
- 利用质谱仪在Traf6.6上确定c-Src酸化位点.
- 采用位点定向突变发生来破坏Traf6酸化和多基化.
- 研究了人类诱导的多能干细胞衍生神经元和体内模型中的AEP激活.
- 分析了阿尔茨海默氏病的大脑组织,以确定途径组件和Tau病理之间的相关性.
主要成果:
- 通过表皮生长因子刺激,c-Src通过表皮生长因子刺激来调解AEP激活和聚基化.
- 对于c-Src诱导的AEP激活,Traf6是必不可少的;其通过c-Src的酸化是至关重要的.
- 在神经元中,药理上抑制c-Src和基因废除Traf6可以防止AEP的激活和Tau的切断.
- 在阿尔茨海默氏病的大脑中,Traf6酸化与AEP激活和病理性Tau标志物相关.
结论:
- c-Src-Traf6信号通路是AEP激活和随后的Tau裂变的关键调节者.
- 准c-Src-Traf6相互作用为阿尔茨海默病和其他多病症提供了潜在的治疗策略.
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