线粒体复合体III衍生的ROS放大了天体细胞中的免疫代谢变化,并促进了痴呆病理学
Daniel Barnett1,2,3, Till S Zimmer1,2, Caroline Booraem1,2,3
1Helen and Robert Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY.
bioRxiv : the preprint server for biology
|September 4, 2024
概括
线粒体复合体III在星球细胞中产生反应性氧物种 (ROS),在神经退行性疾病中导致神经炎症和神经元损伤. 抑制这种ROS为痴呆症等疾病提供了一个有前途的治疗标.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 神经退行性疾病与线粒体功能障碍和改变反应性氧物种 (ROS) 生产有关.
- 线粒体复合体III (CIII) 是已知的ROS生成器,但其在神经疾病中的具体作用和触发因素尚不清楚.
研究的目的:
- 在神经病理学过程中研究CIII衍生的ROS在星球细胞中的作用.
- 在神经退行性疾病的背景下确定CIII-ROS的分子机制和下游影响.
- 评估向CIII-ROS的治疗潜力.
主要方法:
- 利用选择性抑制剂和天体细胞中的遗传操纵.
- 采用了线粒体ROS成像和多原子分析 (转录组学,代谢组学).
- 评估了神经元毒性,并在毛病病的小鼠模型中验证了发现.
主要成果:
- 鉴定出CIII是对神经病理刺激作出反应的天体细胞中主要的ROS来源.
- 天体细胞CIII-ROS的产生受核因子-κB (NF-κB) 和线粒体-交换器 (NCLX) 的调节.
- CIII-ROS氧化了关键蛋白质,放大了天体细胞的代谢和转录变化 (通过STAT3介导),并引起了非细胞自主的神经元毒性.
- 在小鼠中抑制CIII-ROS可减少病,神经炎症,并延长寿命.
结论:
- 在神经退行性疾病中,CIII-ROS充当关键的免疫代谢信号转换器.
- 准CIII-ROS为神经退行性疾病提供了一个可行的治疗策略.
- 这项研究阐明了一种新的机制,该机制将线粒体功能,炎症和神经元退化联系起来.
相关概念视频
Electron Transport Chain: Complex I and II
12.3K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
12.3K
Mitochondria
11.5K
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
11.5K


