由ND4 G11778A突变介导的氧化应激失衡和细胞损伤
Lijun Fang1, Kangyue Fu2, Mengyu Yang2
1Department of Ophthalmology, Fujian Medical University Union Hospital, No. 29, Xinquan Road, Fuzhou, 350001, Fujian, China.
Scientific reports
|February 21, 2026
概括
MT-ND4突变 (m.11778G>A) 损害了线粒体功能,降低了氧气消耗和抗氧化能力. 这导致反应性氧物种增加和细胞损伤,导致视神经退化.
科学领域:
- 线粒体生物学 线粒体生物学
- 细胞病理学 细胞病理学
- 遗传学 是一个遗传学.
背景情况:
- 线粒体功能障碍与MT-ND4突变 (m.11778G>A) 引起的细胞损伤有关.
- 这种突变的特定病理影响尚不清楚.
- 线粒体是细胞死亡途径的核心,受到这种变异的影响.
研究的目的:
- 研究MT-ND4突变 (m.11778G>A) 对细胞死亡的影响.
- 阐明由R340H突变诱导的线粒体功能障碍的特定机制.
主要方法:
- 使用的661W细胞表达外源的Mut-ND4 (m.G11778A).
- 在银河糖条件下使用海马XF分析仪通过氧气消耗率 (OCR) 评估线粒体功能.
- 测量了活性氧物种 (ROS) 生产和抗氧化酶活性 (CAT,SOD,GSSG).
- 在被Mut-ND4-AAV感染的小鼠中检查了视神经结构.
主要成果:
- 在银河糖条件下,Mut-ND4 (m.G11778A) 表达显著降低了OCR.
- 观察到ROS产量的增加和CAT,SOD和GSSG活动的减少.
- 表达Mut-ND4 (m.G11778A) 的细胞在银河糖条件下显示细胞死亡增加.
- 在受感染的小鼠的视神经中发现了结构性破坏.
结论:
- Mut-ND4 (m.G11778A) 诱导细胞损伤和氧化应激失衡.
- 突变损害了线粒体的氧气消耗,降低了抗氧化能力.
- 这些影响有助于增加细胞死亡和潜在的视神经损伤.
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