在发育和衰老过程中抑制RIPK1驱动的亡和炎症
Daichao Xu1, Taijie Jin2, Hong Zhu1
1Department of Cell Biology, Harvard Medical School, 240 Longwood Ave., Boston, MA 02115, USA.
Cell
|August 28, 2018
概括
衰老通过减少TAK1而加剧神经退行,而TAK1会激活RIPK1. 这种与TBK1损失等遗传因素的相互作用促进了肌缩侧面硬化和前性痴呆.
科学领域:
- 神经科学
- 遗传学
- 老龄化研究
背景情况:
- 衰老是神经退行性疾病的主要危险因素.
- 老龄化和神经退行性遗传倾向之间的相互作用尚不清楚.
- 已知TBK1突变是肌缩侧面硬化 (ALS) 和前性痴呆 (FTD) 的遗传原因.
研究的目的:
- 调查TBK1部分功能丧失如何与衰老相互作用以驱动神经退行.
- 阐明 RIPK1 和 TAK1 在年龄相关的神经退行过程中的作用.
主要方法:
- 使用Tbk1+/-小鼠模型研究年龄相关的神经退行.
- 在老化的大脑中评估RIPK1抑制剂 (TBK1和TAK1) 的表达水平.
- 研究了RIPK1抑制对Tbk1+/-小鼠的ALS/FTD特征的影响.
主要成果:
- TBK1 作为 RIPK1 的内源抑制剂.
- 老化的人类大脑显示TAK1的表达减少,另一个RIPK1抑制剂.
- 在Tbk1+/-小鼠中减少了神经炎症,TDP-43聚合,轴突退化,神经元损失和行为缺陷.
- 抑制RIPK1成功地阻止了这些ALS/FTD的特征.
结论:
- 衰老通过减少TAK1表达来促进RIPK1的激活.
- 这种与年龄相关的RIPK1激活与遗传风险因素 (如TBK1损失) 合作,促进ALS/FTD发病.
- 针对RIPK1可能为与年龄相关的神经退行性疾病提供治疗策略.
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