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与莱伯遗传性视神经病相关的ND1 3733G>C突变改善了线粒体质量控制和细胞平衡

Meiheriayi Yasheng¹, Yanchun Ji², Yunfan He¹

¹Center for Mitochondrial Biomedicine and Department of Ophthalmology, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, China; Center for Genetic Medicine, Zhejiang University International Institute of Medicine and School of Medicine, Yiwu, Zhejiang, China; Institute of Genetics, Zhejiang University, Hangzhou, Zhejiang, China.

The Journal of biological chemistry

|July 10, 2025

概括

这就是Leber Leber.

科学领域:

线粒体遗传学线粒体遗传学
神经眼科神经眼科
细胞生物学细胞生物学

背景情况:

勒伯遗传性视神经病 (LHON) 是一种线粒体DNA (mtDNA) 疾病.
与LHON相关的mtDNA突变影响细胞完整性的确切机制尚不清楚.
最近在中国的LHON血统中发现了一种新的ND1 3733G>C (p.E143Q) 突变.

研究的目的:

为了阐明LHON中m.3733G>C突变的致病机制.
为了研究这种突变对线粒体结构,功能和细胞平衡的影响.

主要方法:

通过将没有mtDNA的细胞与患者衍生的细胞融合,利用了cybrid模型.
进行了分子动力学模拟,以评估突变对ND1蛋白质结构的影响.
分析了线粒体复合体I组合和活动,呼吸功能,ATP生产和反应性氧物种 (ROS) 水平.

主要成果:

该p.E143Q突变破坏了ND1蛋白相互作用的稳定,并降低了ND1水平.
观察到有缺陷的复合物I组合/活动,呼吸减少,ATP合成减少,ROS产量增加.
突变诱导的线粒体动力学变化 (分裂增加) 和受损的泛胺依赖性线粒细胞衰变 (帕金/PINK1降低).

结论:

在LHON.中,m.3733G>C突变导致显著的线粒体功能障碍.
这些功能障碍会破坏线粒体质量控制,细胞平衡,并促进细胞亡.
这些发现为由特定mtDNA突变驱动的LHON病理生理学提供了新的见解.

关键词:

这就是ATPATPATP ATP.莱伯遗传性视神经病变是莱伯遗传性视神经病变.NADH:乌比金氧降解酶.在ND1突变的过程中,灭症 (apoptosis) 是一种死亡的过程.自自是自的过程.线粒体中的线粒体.线粒体的融合和裂变.线粒细胞衰变 (mitophagy) 是一种神经衰变的过程.氧化酸化是一种氧化酸化.有活性氧物种的反应性氧物种.视力损失视力损失

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