下部心位完整性信号 升高的内腔和无症状老年人的临床进展
Nina Engels-Domínguez1,2, Joost M Riphagen2,3, Maxime Van Egroo1,2,3
1Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience, Alzheimer Centre Limburg, Maastricht University, Maastricht, The Netherlands.
Annals of neurology
|July 15, 2024
概括
脑位完整性是一个有希望的,非侵入性的工具,用于检测早期的沉积和预测无症状个体的认知衰退. 这种MRI测量比粉样蛋白PET和海马体积在识别内皮层中升的tau的表现更好.
科学领域:
- 神经成像是一种神经成像.
- 神经病理学神经病理学
- 认知神经学 认知神经学
背景情况:
- 低β-粉样蛋白的人体内内皮层 (EC) tau的升高可以预测未来的病理和认知衰退.
- 识别有神经退行风险的个体对于早期干预至关重要.
研究的目的:
- 为了比较MRI衍生基因库 (LC) 完整性,新皮质β-粉样蛋白负担 (PET) 和海马体积在无症状β-粉样蛋白阴性个体中识别升高的EC tau时的准确性.
- 评估LC完整性对临床进展的预测价值.
主要方法:
- 188个无症状的个体接受了LC的3T-MRI,匹兹堡化合物-B (PiB) PET和Flortaucipir (FTP) PET.
- 后勤回归和ROC分析比较了LC完整性,PiB和海马体积,用于预测CDR=0和PiB-.的个体中EC tau升高的情况.
- 考克斯的比例危险模型评估了6年内与临床进展的关联.
主要成果:
- 在CDR=0/PiB-样本中,26%的个体具有高EC FTP.
- 脊髓完整性是EC FTP升高 (AUC=85%) 的更敏感和更具特异性的预测因素,而不是PiB (AUC=77%) 或海马体积 (AUC=76%).
- 较低的LC完整性预测了临床进展的两倍增加,包括轻度认知障碍.
结论:
- 脑位完整性显示,作为一种低成本,非侵入性查工具,用于在无症状,低β-粉样蛋白个体中早期皮质沉积.
- 脊髓细胞完整性可以帮助识别患有临床进展风险的个体,可能有助于早期检测和干预策略.
相关概念视频
Alzheimer's Disease: Overview
461
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...
461
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
Neural Regulation
39.3K
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.
39.3K
Cognitive Development During Adulthood
83
Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
83


