相关实验视频
Updated: Jun 4, 2025

05:17
Hybrid PET/MRI Imaging of Alzheimer's Disease Based on 18F-AV-1451
Published on: April 18, 2025
90
纵向突触损失与tau Braak分期在amnestic轻度认知障碍中
Greet Vanderlinden1,2, Michel Koole1,2, Laura Michiels2,3,4,5
1Nuclear Medicine and Molecular Imaging, Imaging and Pathology, KU Leuven, Leuven, Belgium.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 28, 2024
概括
在早期的阿尔茨海默氏症中,tau积累高原,同时突触蛋白质损失加速,影响认知. 这表明病理驱动突触功能障碍,即使在轻微的认知障碍.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 生物化学 生物化学
背景情况:
- 阿尔茨海默病 (AD) 的进展和突触损失动态尚未完全理解.
- 病理对阿尔茨海默氏症纵向突触变化的特定影响需要进一步研究.
研究的目的:
- 为了研究在amnestic轻度认知障碍 (aMCI) 中突触损失的纵向进展.
- 为了检查病理和突触囊泡蛋白2A (SV2A) 随时间变化的关系.
- 确定这些变化与认知衰退之间的关联.
主要方法:
- 使用正子发射断层扫描 (PET) 来测量30名aMCI患者和26名对照者的tau,SV2A和粉样蛋白.
- 对21名aMCI患者进行了为期2年的随访 (FU),包括认知评估.
- 在布拉克地区分析了tau和SV2A的纵向变化.
主要成果:
- 在后来的布拉克地区 (III-VI),水平在纵向上升,但在aMCI的早期地区 (I-II) 停滞不前.
- 在aMCI患者中,SV2A在所有Braak区域都显示出纵向下降.
- 基线与SV2A损失有负相关性,并与认知衰退相关,以及纵向SV2A变化.
结论:
- 在aMCI阶段,积似乎在早期的布拉克地区稳定.
- 在aMCI患者的长度SV2A下降表明广泛的突触功能障碍.
- 基线TAU和SV2A损失之间的观察到的关系表明,TAU病理可能在AD早期驱动突触功能障碍.
更多相关视频
相关概念视频
Alzheimer's Disease: Overview
444
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...
444
Long-term Depression
2.5K
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
If over...
Calcium Ion Concentration Mechanism
If over...
2.5K
Alzheimer's Disease: Treatment
162
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...
162
Amnesia
99
Amnesia is a condition marked by long-term memory loss, which impairs the ability to recall past events or create new memories.
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
99
Dementia
94
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....
94

