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在亨廷顿病中,NEDD4L通过促进LIPT2降解来诱导线粒体功能障碍和神经退行症

Pan Fan¹, Yaqing Liu¹, Chunyue Liu²

¹Department of Neurobiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu 211166, China.

Proceedings of the National Academy of Sciences of the United States of America

|July 15, 2025

概括

这项研究确定NEDD4L是亨廷顿病 (HD) 中的关键E3结合酶,将其升高与神经退行联系起来. 恢复NEDD4L水平或脂酸代谢为HD提供了治疗潜力.

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
遗传学是一个遗传学.

背景情况:

线粒体蛋白质的不稳定性有助于亨廷顿病 (HD) 中的神经退行.
调节HD中线粒体蛋白质恒温的特定E3酶在很大程度上是未知的.

研究的目的:

为了研究E3结合酶NEDD4L在亨廷顿病的发病过程中的作用.
阐明NEDD4L影响Mitochondrial功能和HD中神经退行症的分子机制.

主要方法:

使用患者衍生的人类条状器官 (hSOs) 和YAC128鼠标模型的HD.
评估了NEDD4L过度表达和删除对神经元形态,信号和运动功能的影响.
研究了NEDD4L与酸转移酶2 (LIPT2) 的相互作用及其对酸代谢的影响.

主要成果:

在HD模型中,NEDD4L蛋白水平升高.
过度表达NEDD4L导致中等脊髓神经元 (MSN) 退化和运动缺陷.
在HD模型中,NEDD4L删除改善了神经退行和改善了运动功能.
NEDD4L针对LIPT2的降解,损害了脂酸生物合成和线粒体功能.
过度表达LIPT2或补充脂酸可以挽救神经退行和运动缺陷.

结论:

通过通过LIPT2降解来破坏线粒体功能,NEDD4L在HD病变发生过程中发挥着关键作用.
准NEDD4L或增强脂酸代谢是亨廷顿病的一个有前途的治疗策略.

关键词:

亨廷顿病就是亨廷顿病.在LIPT2中,LIPT2是LIPT2.在NEDD4L中,它是NEDD4L.神经退行症的神经退行症在任何地方都是无处不在的.

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