在小鼠前脑中的蛋白质体功能障碍诱导了线粒体DNA释放,cGAS-STING信号激活和亡
Abena Dwamena1,2,3, Yasin Asadi1,2,3, Erin Gilstrap1,2,3
1Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX, United States.
Journal of neuropathology and experimental neurology
|August 1, 2025
概括
蛋白质酶功能障碍通过激活cGAS-STING通路引发神经炎症和神经元死亡. 这项研究揭示了蛋白质酶功能受损与神经退行过程之间的联系.
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
- 免疫学 免疫学 免疫学
背景情况:
- 蛋白酶功能受损与神经退行性疾病 (如阿尔茨海默氏症) 有关.
- 连接蛋白质酶功能障碍,神经炎症和神经元死亡的精确机制尚未完全理解.
研究的目的:
- 研究受损蛋白质酶功能对神经炎症和神经元死亡的影响.
- 阐明涉及蛋白质体受损神经退行的分子途径.
主要方法:
- 使用神经元特定的PSMC1条件淘汰 (cKO) 鼠标模型.
- 分析了cKO小鼠大脑中的蛋白质体功能,DNA感知通路,炎症调解剂和亡标记物.
主要成果:
- 19S蛋白酶的破坏增加了细胞质线粒体DNA的释放,并激活了cGAS-STING通路.
- 观察到高水平的促炎媒介 (STAT1,NF-κB,IL-1β,IL-6,TNFα) 的情况.
- 发现死亡亡的标志物增加 (MLKL,RIPK1/3) 和大脑重量减少.
结论:
- 蛋白质酶功能障碍激活了cGAS-STING信号通路.
- 这种激活会导致神经炎症和死核性神经元死亡.
- 研究结果表明,一种新的机制有助于神经退行.
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