线粒体能量转换能力影响在感官,情感和认知任务期间的大脑激活
Ke Bo1, Catherine Kelly2, Caroline Trumpff2
1Department of Psychological and Brain Sciences, Dartmouth college, Hanover, NH.
bioRxiv : the preprint server for biology
|July 9, 2025
概括
线粒体疾病会损害大脑的能量,导致认知缺陷. 当能量有限时,大脑优先考虑像情绪这样的基本功能,而不是复杂的认知,显示出能量层次结构.
科学领域:
- 神经科学是一个神经科学.
- 代谢障碍 代谢障碍 代谢障碍
- 认知科学是一种认知科学.
背景情况:
- 大脑功能严重依赖于线粒体的能量生产.
- 细胞能量对神经功能和认知的影响尚未完全理解.
- 线粒体疾病 (MitoD) 为研究大脑能量限制提供了一个模型.
研究的目的:
- 调查线粒体功能障碍如何影响大脑活动和认知功能.
- 为了确定最受有限的细胞能量限制的神经过程.
- 探索大脑对线粒体缺陷的反应中的能量层次.
主要方法:
- 功能磁共振成像 (fMRI) 用于评估大脑活动.
- 29名MitoD患者和62名对照患者接受了休息状态和基于任务的fMRI.
- 任务包括认知 (N-back),情感 (冷痛) 和感官挑战.
主要成果:
- 甲型D个体表现出认知缺陷和升高的代谢压力标志物 (GDF15,FGF21).
- 整体大脑活动和连接性在很大程度上被保留,但工作记忆活动减少与损伤相关.
- 高功能MitoD个体在工作记忆区域表现出补偿性过活化.
结论:
- 大脑采用能量层次结构,在有限的线粒体能量下,优先考虑情感功能而不是认知功能.
- 认知过程比感官或情感功能更容易受到能量缺陷的影响.
- 线粒体功能障碍通过能量限制显著影响认知表现.
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