线粒体功能的罕见和常见的遗传决定因素决定了肌缩性侧面硬化症的严重程度,但不是风险
Calum Harvey1, Marcel Weinreich2, James A K Lee1
1Sheffield Institute for Translational Neuroscience (SITraN), University of Sheffield, Sheffield, UK.
Heliyon
|February 6, 2024
概括
线粒体功能会影响肌缩性侧面硬化症 (ALS) 的生存率,但不会影响风险. 特定的线粒体单双类型影响ALS的进展,这表明线粒体功能是治疗疾病严重程度的治疗目标,而不是预防.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 线粒体生物学 线粒体生物学
背景情况:
- 肌缩侧面硬化症 (ALS) 选择性地影响能源密集型运动神经元.
- 线粒体功能在ALS病变发生中的作用 (上游驱动器与下游修饰器) 仍然不清楚.
研究的目的:
- 区分线粒体功能的上游遗传决定因素与ALS的下游因素.
- 调查线粒体单双型和线粒体DNA拷贝数 (mtCN) 对ALS风险和生存的影响.
主要方法:
- 对包括6437名ALS患者在内的三个队列的分析.
- 利用线粒体单双型来推断线粒体功能的因果关系,与使用自体SNP的传统门德尔随机化 (MR) 相比.
- 研究了ACADM和DNA2中的遗传变异,以及它们对运动神经元 (MN) 表达和ALS生存的影响.
主要成果:
- 线粒体单质类型,而不是自体SNP,使线粒体功能的因果推断成为可能.
- 特定的线粒体单双类型影响了ALS发病后的生存率,但没有影响整体风险;一个单双类型显示了神经保护作用.
- 在ACADM和DNA2中的功能丧失变体和减少的MN表达,显著缩短了ALS生存时间约50%.
- 线粒体DNA拷贝数 (mtCN) 动态响应ALS发作,与疾病严重程度相关,并与DNA2功能相关.
结论:
- 线粒体功能是ALS生存率和疾病严重程度的决定因素,但不是预防因素.
- 线粒体单质类型是影响ALS进展的关键遗传决定因素.
- ACADM和DNA2是影响ALS生存的关键基因,通过它们在线粒体功能中的作用.
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