MAPK家族成员差异调节pThr175的tau介导的致病性
Neil Donison1, Matthew A Hintermayer2, Jacqueline Palik2
1Molecular Medicine Group, Robarts Research Institute, Western University, London, ON, Canada; Neuroscience Graduate Program, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada.
Neurobiology of disease
|December 14, 2025
概括
该研究确定ERK2和JNK1是Thr175中酸化tau的关键激酶,这是病发展的关键步骤. 以ERK2为媒介的酸化特别触发了病态的层,包括聚合和神经纤维状结形成.
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:
- 在Thr175中的酸化与CTE和TBI等病变中的病理错折和聚合有关.
- 驱动Thr175酸酸化的细胞机制尚不清楚.
- 氧化应激和MAPK信号通路与陶酸化有关.
研究的目的:
- 阐明负责Thr175酸酸化的细胞机制.
- 为了确定Thr175酸酸化中涉及的特定激酶.
- 调查Thr175 fosforylation在启动病理性级联中的作用.
主要方法:
- 在创伤性脑损伤 (TBI) 的动物模型中进行分子和组织学分析.
- 试验室内激酶试验以评估候选激酶对Thr175 tau的酸化.
- 对与分子伴侣DnaJC7.7.的tau相互作用的分析.
- 研究氧化应激对陶酸化和MAPK信号传递的影响.
主要成果:
- 在TBI模型中,ERK2,JNK1和p38被确定为与pThr175 tau相关的候选激酶.
- 在实验室中证实ERK2和JNK1可酸化Thr175.
- 通过ERK2介导的Thr175酸化启动了病态级联:PAD暴露,酸寡合化,截断和神经纤维状结形成.
- Thr175酸化改变了tau与DnaJC7的相互作用,这是tau错折的调节者.
- 氧化应激增加了pThr175和pThr231,激活了MAPK通路.
结论:
- ERK2和JNK1是Thr175酸酸化的关键细胞媒介.
- 通过Thr175酸化,ERK2在启动病态层中起着至关重要的作用.
- 这些发现澄清了病态形形成的上游机制,并突出了潜在的治疗点.
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