在衰老过程中由压力诱导的认知功能障碍:机制和未来的挑战.
Yizhe Zhang1,2, Xiao Zhang1,2, Jiaxi Guo3
1Department of Anesthesiology, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
Frontiers in aging neuroscience
|November 7, 2025
概括
压力会损害记忆力,特别是在老年人中. 这项研究揭示了老年小鼠与保护性细胞内网膜 (ER) 应激反应和线粒体功能进行斗争,突出了预防认知衰退的关键目标.
科学领域:
- 神经科学是一个神经科学.
- 老年学是一门学科.
- 分子生物学分子生物学
背景情况:
- 压力事件可能会导致暂时的记忆缺陷,老年人的影响会恶化.
- 全球人口老龄化需要策略来预防压力诱导的认知功能障碍.
- 了解这些缺陷背后的机制对于开发神经保护疗法至关重要.
研究的目的:
- 为了研究老鼠对压力的特定年龄分子反应.
- 确定潜在的治疗目标,以减轻老年人群中因压力引起的认知衰退.
主要方法:
- 雄性C57BL/6小鼠 (2个月和18个月) 经历了克制压力.
- 行为测试 (开放场地,新型物体识别) 评估了活动,焦虑和认知.
- 基因表达分析 (mRNA测序,RT-qPCR) 和蛋白质验证 (西部斑,免疫光) 确定了分子变化.
- 基因本体学丰富分析 (DAVID) 提供了功能性见解.
主要成果:
- 在压力下,老年小鼠表现出保护性内细胞网膜 (ER) 压力基因的上调受损.
- 相反,年轻小鼠上调了线粒体组织和腺三酸盐 (ATP) 代谢基因.
- 老年小鼠在压力后表现出线粒体表达和翻译通路的下调.
结论:
- 衰老通过不同的分子途径加剧了压力诱导的认知障碍.
- 功能障碍的内质网膜 (ER) 应激反应和线粒体通路是与年龄相关的关键脆弱性.
- 针对ER压力和线粒体功能障碍可能为老年人认知保护提供新的治疗策略.
相关概念视频
Aging
577
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
577
Cognitive Development During Adulthood
757
Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
757
Alzheimer's Disease: Overview
1.6K
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...
1.6K
Dementia
503
Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
The progression of dementia is generally gradual....
The progression of dementia is generally gradual....
503
Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
527
Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function.
527
The Effect of Aging on Tissues
3.1K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
3.1K


