通过与JNK相互作用稳定mtDNA,DUSP1可以防止缺血性急性损伤
Lang Shi1, Hongchu Zha2, Zhou Pan1
1Department of Nephrology, Renmin Hospital of Wuhan University, Wuhan, 430060, China.
Cell death & disease
|November 7, 2023
概括
双特异性酸酶1 (DUSP1) 通过防止线粒体损伤和阻断cGAS-STING通路,防止急性损伤 (AKI). DUSP1 缺乏会使损伤和纤维化恶化,强调其保护作用.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 线粒体生物学 线粒体生物学
- 分子医学是分子医学.
背景情况:
- 线粒体功能障碍与急性损伤 (AKI) 以及其进展为慢性病 (CKD) 有关.
- 已知双特异性酸酶1 (DUSP1) 能够保持线粒体的完整性.
- DUSP1在AKI病原和AKI到CKD过渡中的确切作用尚未完全理解.
研究的目的:
- 研究DUSP1在缺血性AKI和后缺血性纤维化发展中的作用.
- 阐明DUSP1在AKI中发挥保护作用的潜在机制.
主要方法:
- 已建立的缺血性AKI和纤维化小鼠模型使用脏脚紧固.
- 使用了Dusp1淘汰和管状特定的Sting淘汰小鼠.
- 通过电子显微镜评估线粒体损伤,膜潜力,mtDNA释放和BAX转位.
主要成果:
- 在人类和小鼠AKI脏组织中,Dusp1的表达被上调.
- Dusp1缺乏症加重缺血性AKI,纤维化和管状线粒体功能障碍.
- DUSP1缺乏导致异常的JNK酸化,BAX转移到线粒体,mtDNA泄漏和cGAS-STING通路激活.
- 抑制JNK或BAX,或SING淘汰,改善了DUSP1缺乏的有害影响.
结论:
- DUSP1 作为一个关键的调节器,对 AKI 的保护性反应起作用.
- DUSP1通过JNK脱,防止BAX介导的线粒体DNA泄漏和过度的cGAS-STING信号激活.
- DUSP1 缺乏会加剧 AKI 和纤维化,强调其治疗潜力.
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