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甲基因中介的甲基因组功能障碍激活了2,5-hexanedione诱导的神经病变中的SARM1-依赖的轴突退化

Wenting Ni¹, Yihan Ye², Shuai Wang²

¹Department of Toxicology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China; Gansu Provincial Hospital, Lanzhou, Gansu, 730000, China.

Environmental pollution (Barking, Essex : 1987)

|August 2, 2024

概括

2,5-hexanedione (HD) 是n-hexane的一种代谢物,通过形成Pyrrole adducts (PAs) 来引起神经毒性,从而触发SARM1依赖的轴突退化. 阻断SARM1或准PA可能治疗n-hexane神经病变.

科学领域:

神经科学是一个神经科学.
毒理学毒理学毒理学
分子生物学分子生物学

背景情况:

2,5-hexanedione (HD) 是n-hexane的有毒代谢物,通过形成 pyrrole adduct (PA) 诱导神经毒性.
精确的PA诱导的轴突退化的机制和无菌α和托尔/互白素1受体动机含有蛋白1 (SARM1) 的作用仍然不完全理解.

研究的目的:

为了研究SARM1在老鼠的HD诱导神经毒性的作用.
使用Sarm1淘汰赛 (KO) 小鼠探索PAs和SARM1介导的轴突退化之间的因果关系.

主要方法:

暴露于HD的老鼠,以评估神经毒性和SARM1激活.
使用Sarm1 KO小鼠来确定SARM1在HD诱导病理中的必要性.
研究PAs在线粒体上的局部化和影响.

主要成果:

暴露于HD导致了动物显著的轴突退化和神经元损失.
HD激活了SARM1依赖的轴突退化的途径.
在暴露于HD的小鼠中,Sarm1 KO减轻了运动缺陷,并挽救了神经元损失.
在线粒体上积聚了PA,导致线粒体功能障碍,这是神经损伤的一个上游事件.

结论:

HD诱导的神经毒性涉及SARM1依赖的轴突退化.
由于PA积累而导致的线粒体功能障碍是n-hexane神经病变的关键上游事件.
准PA和SARM1为n-hexane中毒提供了一个潜在的治疗策略.

关键词:

2,5-Hexanedione的使用情况.轴突退化是一种轴突退化.线粒体功能障碍线粒体功能障碍这就是SARM1的作用.有毒的神经病变毒性神经病变

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