在阿尔茨海默病中使用PET和等离子体生物标志物对粉样蛋白和蛋白轨迹的时间建模
Christopher A Brown1, Katheryn A Q Cousins1, Magdalena Korecka2
1Department of Neurology, University of Pennsylvania, Philadelphia, PA, USA.
Annals of neurology
|March 16, 2026
概括
血生物标志物时间建模提供了与阿尔茨海默病PET扫描相似的洞察力,特别是对于tau的发病. 这种可访问的工具有助于评估生物疾病的严重程度.
科学领域:
- 神经科学是一个神经科学.
- 生物标志物研究 生物标志物研究
- 医疗成像医学成像
背景情况:
- 阿尔茨海默病 (AD) 的特点是粉样蛋白和病理.
- 定子发射断层扫描 (PET) 是跟踪这些病理的关键成像方式.
- 血生物标志物为疾病评估提供了一个不那么侵入性的替代方案.
研究的目的:
- 为了比较使用PET与等离子体对粉样蛋白和蛋白生物标记物的时间建模.
- 评估PET和基于血的模型之间的准确性和一致性,以估计疾病发病.
- 确定影响陶氏体发病的因素和陶氏体发病到痴呆的时间.
主要方法:
- 分析了来自粉样PET,PET和血p-tau217的纵向数据.
- 用样本代局部近似 (SILA) 来生成生物标志物轨迹模型.
- 模型与估计的粉样蛋白和的发病情况进行了比较,并评估了影响疾病进展的因素.
主要成果:
- 血和PET模型对粉样蛋白和的发病率的估计类似,对的估计更高.
- 准确性在模式内很高 (MAE ≤2.03) 和在模式之间略低 (MAE 3.09-3.42).
- 较早的陶氏体发病与较年轻的粉样蛋白发病,女性性别和APOE ε4存在相关;男性性别与血模型中较短的陶氏体-痴呆症间隔有关.
结论:
- 血生物标志物的时间建模提供了与PET可比的信息,特别是在开始时.
- 血生物标志物作为一种可访问的工具,用于临床评估阿尔茨海默病的生物严重程度.
- 这种方法增强了AD管理中广泛临床应用的潜力.
相关概念视频
Alzheimer's Disease: Overview
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 and tau...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
Alzheimer Disease ll: Pathophysiology
Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...


