超越大脑:在阿尔茨海默病的早期自主功能障碍
Carmen Nanclares1, Inés Colmena2, Alicia Muñoz-Montero2
1Departamento de Farmacología, Facultad de Medicina, Universidad Autónoma de Madrid, IDIPHISA, Madrid, Spain. carmen.nanclares@uam.es.
Acta neuropathologica communications
|June 10, 2025
概括
上腺髓在阿尔茨海默病 (AD) 模型中显示早期功能缺陷,影响神经递质平衡和行为. 这些发现突显了上腺髓在阿尔茨海默病进展中的作用以及作为治疗点的潜力.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 病理生理学 病理生理学
背景情况:
- 阿尔茨海默氏病 (AD) 病理学传统上被视为中心,涉及粉样质斑块和团.
- 新出现的证据表明,包括上腺髓在内的外周神经系统功能障碍可能导致AD.
- 上腺髓在阿尔茨海默病发病中的作用仍未得到充分研究,尽管它在应激反应和神经传递中的功能.
研究的目的:
- 在AD.的三重转基因 (3xTg) 鼠标模型中研究上腺色氨酸细胞 (CCs) 的功能变化.
- 评估这些CC功能障碍对系统神经递质水平和相关行为的影响.
主要方法:
- 电生理学测量3xTg鼠标CCs中的离子电流 (Na+,Ca2+,K+,ACH).
- 高分辨率电压计,以评估囊泡释放和聚变孔动力学.
- 在血,大脑和其他外围区域中量化神经递质;行为测试.
主要成果:
- 早期 (2个月大) 3xTg CCs表现出受损的外细胞形成,减少囊泡释放,以及缓慢的融合孔动力学.
- 减少的Na+,Ca2+和ACH电流会损害CC刺激能力,与年龄相关的K+电流会增加.
- 系统性神经递质失衡 (改变的诺亚上腺素,多巴胺,胺) 与焦虑和抑郁类行为相关.
结论:
- 上腺髓是阿尔茨海默病早期catecholaminergic失调的一个未被认可的部位.
- 周围CC功能障碍导致AD模型中观察到的全身神经递质失衡和行为变化.
- 这些发现表明,外周神经内分泌变化与中心AD特征之间存在联系,确定上腺髓作为潜在的治疗点和生物标志物来源.
相关概念视频
Alzheimer's Disease: Overview
451
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...
451
Alzheimer's Disease: Treatment
170
Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...
170
Neural Regulation
39.2K
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.
39.2K
Disorders of the Autonomic Nervous System
586
The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
Raynaud's disease, also known as Raynaud's...
Raynaud's disease, also known as Raynaud's...
586
Parkinson's Disease: Overview
495
Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
495
Dementia
102
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....
102


