相关实验视频
Updated: Sep 16, 2025

09:22
In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein
Published on: January 2, 2015
18.5K
在阿尔茨海默病中,突触损失模式受到大脑连接体的约束,并由酸化的调节
Ying Luan1,2, Weiyi Wang1, Qi Huang1
1Department of Nuclear Medicine & PET Center, Huashan Hospital, Fudan University, Shanghai, China.
Nature communications
|July 10, 2025
概括
阿尔茨海默氏症导致了遵循大脑网络模式的突触损失. 高度连接的区域经历了更大,更快的突触损失,受病理的影响.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 医疗成像医学成像
背景情况:
- 突触损失是阿尔茨海默病 (AD) 的关键特征,与认知能力下降相关.
- 驱动AD突触损失的模式和起源的机制仍然不太清楚.
- 病理性通过大脑网络传播,这表明网络架构可能会影响突触退化.
研究的目的:
- 为了研究大脑网络架构与阿尔茨海默病中的突触损失之间的关系.
- 确定网络连接是否影响AD中突触退化的模式和进展.
- 探索病理在网络受约束的突触损失中的作用.
主要方法:
- 在91名阿尔茨海默病患者和54名对照组中使用了针对突触囊泡糖蛋白2A (SV2A) 的正子发射断层扫描 (PET) 成像技术.
- 规范性人类连接组数据与SV2A PET成像结果相结合.
- 使用了血p-tau181水平和死后脑组织分析.
主要成果:
- 具有强大的网络连接的地区显示了类似的突触损失水平.
- 一个区域的突触损失与连接区域的连接权重突触损失有关.
- 与病理的初始部位密切相关的区域经历了更快的突触损失,与血p-tau181水平相关.
结论:
- 大脑网络拓在抑制阿尔茨海默病中的突触脆弱性方面发挥着作用.
- 突触损失的传播和严重程度受到网络连接和病理的影响.
- 这些发现提供了对AD中神经退行症的基于网络的机制的见解.
相关概念视频
Alzheimer's Disease: Overview
675
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...
675
Long-term Depression
2.6K
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...
2.6K
Neural Regulation
40.3K
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.
40.3K
Alzheimer's Disease: Treatment
265
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...
265
Amyloid Fibrils
9.9K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
9.9K

