在阿尔茨海默病连续性上对白质通道病理的脆弱性
Bramsh Qamar Chandio1, Talia M Nir1, Julio E Villalon-Reina1
1Imaging Genetics Center, Mark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine, University of Southern California, Marina del Rey, CA, USA.
bioRxiv : the preprint server for biology
|September 2, 2025
概括
阿尔茨海默病 (AD) 与粉样β斑有关. 这项研究使用先进的导管测量来绘制粉样蛋白对大脑白质路径的影响,
科学领域:
- 神经成像
- 神经学
- 生物医学工程
背景情况:
- 阿尔茨海默病 (AD) 涉及渐进的认知衰退,粉样β (Aβ) 斑块的积累,病理和神经元的损失.
- 了解粉样蛋白对神经通路的影响对于阿尔茨海默病的研究至关重要.
- 流体测量为微观结构异常的局部化提供了体内白质道的3D定量评估.
研究的目的:
- 通过导管测量来评估粉素阳性的局部影响.
- 调查粉样蛋白对白质的潜在作用.
- 想象和突出与阿尔茨海默病相关的白质退化模式.
主要方法:
- 应用捆绑分析 (BUAN) 导管测量对1908名参与者的扩散MRI数据 (ADNI3和HABS-HD队列).
- 使用纵向统计分析来检测粉素阳性和白质微观结构之间的空间局部关联.
- 使用对粉样蛋白敏感的正电子发射断层扫描 (PET) 量化粉样蛋白阳性.
主要成果:
- 鉴定出与粉素阳性相关的白质退化模式.
- 证明了BUAN对细微的局部白质异常的特定量化和检测能力.
- 呈现了3D可视化图,说明了通道中的粉样蛋白关联.
结论:
- 粉样蛋白阳性与阿尔茨海默病中白质退化的特定模式有关.
- 与AD病理相关的白质完整性的详细分析是有效的.
- 这些发现有助于了解AD进展背后的神经生物学机制.
相关概念视频
Alzheimer's Disease: Overview
666
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...
666
Amyloid Fibrils
9.8K
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,...
9.8K
Alzheimer's Disease: Treatment
260
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...
260


