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在m.3243A>G纤维细胞的复杂I缺乏通过减少NADH积累来缓解

Tongling Liufu¹, Haiyan Yu², Jiaxi Yu¹

¹Department of Neurology, Peking University First Hospital, Beijing, China.

Frontiers in physiology

|August 31, 2023

概括

针对不平衡的NAD+/NADH比率的策略显示出对线粒体疾病的希望. 用mitoLbNOX治疗m.3243A>G纤维细胞降低了NADH水平,并比单独NR更有效地改善了细胞能量生产.

科学领域:

生物化学生物化学
细胞生物学细胞生物学
遗传学是一个遗传学.

背景情况:

线粒体疾病包括影响呼吸链的mtDNA或核DNA突变引起的疾病.
在m.3243A>G突变是常见的,导致不同的表型.
复杂I缺陷和失衡的尼古丁胺氨酸二核酸 (NAD+) /降低的NAD+ (NADH) 比率与m.3243A>G病变发生有关.

研究的目的:

评估针对m.3243A>G突变中不平衡的NAD+/NADH比率的治疗策略.
评估尼古丁胺 рибоoside (NR) 和线粒向的NADH氧化酶 (mitoLbNOX) 对患者衍生纤维细胞的影响.

主要方法:

从m.3243A>G患者的纤维细胞接受了NR或mitoLbNOX的治疗.
评估复合物I功能,氧气消耗率 (OCR),腺三酸盐 (ATP) 生产,以及NAD+/NADH比率.
使用光终身成像显微镜测量NADH水平.

主要成果:

m.3243A>G纤维细胞表现出降低的复合I活性,OCR和ATP生产,NADH水平升高,NAD+/NADH比率降低.
NR治疗增加了NAD+/NADH比率,OCR和ATP,但NADH水平保持不变.
MitoLbNOX治疗导致NAD+/NADH比率,OCR和ATP的明显增加,NADH水平显著降低.

结论:

恢复NAD+/NADH平衡对于线粒体疾病至关重要.
与NAD+补充一起减轻NADH过载可能会比单独的NAD+补充更加强治疗效果.

关键词:

它们是NADH和NADH.一个复杂的I组合.m.3243 一个>G 这就是 mitoLbNOX 的原因.线粒体疾病是线粒体疾病.没有了,没有了.

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