线粒体功能障碍是由来自阿尔茨海默病患者的神经元中的ER-调节障碍引起的
Sarah Mustaly-Kalimi1,2, Wacey Gallegos1,2, Daniel Steinbrenner1
1Center for Neurodegenerative Disease and Therapeutics, The Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL, 60064, USA.
Acta neuropathologica communications
|July 28, 2025
概括
在阿尔茨海默氏病 (AD) 中的神经元中,从瑞诺丁受体 (RyR) 释放失调的会损害线粒体功能和 lysosomal 活动. 用Ryanodex针对RyR提供了一种潜在的治疗策略,以恢复细胞健康.
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:
- 线粒体 (Ca2+) 调节对于神经元的能量生产和新陈代谢至关重要.
- 在阿尔茨海默氏症 (AD) 中,通过氨酸受体 (RyR) 从内分泌网膜 (ER) 释放的Ca2+增加有助于神经元功能障碍.
- 功能障碍的线粒体和溶解体是AD病理学的标志.
研究的目的:
- 研究RyR介导的Ca2+释放失调在AD细胞病理中的作用.
- 评估异常Ca2+信号对AD神经元中线粒体功能和溶酶体活性的影响.
- 评估RyR抑制在缓解AD相关细胞缺陷中的治疗潜力.
主要方法:
- 利用光生物传感器和光学成像来测量线粒体Ca2+水平,氧化应激和AD和非AD个体的神经元中的膜潜力.
- 在患者衍生神经元中评估了caspase-3活性和线粒体清除.
- 研究了RyR调节器Ryanodex对AD神经元中线粒体和细胞功能的影响.
主要成果:
- 与非AD神经元相比,来自AD患者的神经元表现出较高的静止线粒体Ca2+水平,增加的自由基产生,以及较高的caspase-3活性.
- RyR引起的Ca2+释放加剧了线粒体功能障碍,包括AD神经元中增强的Ca2+吸收和膜脱极化.
- 在AD神经元中观察到受损线粒体的清除受损,这表明溶解体功能障碍.
- 用Ryanodex治疗显著改善了AD神经元中的线粒体损伤.
结论:
- 过度的RyR介导的Ca2+释放是AD早期细胞病理的关键驱动因素,影响线粒体,ER和溶解体.
- 这一连串的缺陷导致神经元衰退和阿尔茨海默病的退化.
- 药理上抑制RyR介导的Ca2+释放,通过保持细胞功能,代表了阿尔茨海默病的有希望的治疗途径.
相关概念视频
Alzheimer's Disease: Overview
669
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
669
Neural Regulation
40.1K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
40.1K
Mitochondria
15.0K
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,...
15.0K


