血p-tau217,p-tau181和Aβ42预测了认知正常成年人的粉样蛋白PET阳性
Research square
|February 6, 2026
概括
血化tau217 (p-tau217) 显示出在没有认知障碍的个体中检测早期阿尔茨海默病 (AD) 病理学的强大潜力. 将p-tau217与其他生物标志物和因素结合起来,可以提高对粉样β积累的预测准确度.
科学领域:
- 神经学 神经学
- 生物标志物发现发现
- 阿尔茨海默氏症疾病研究研究
背景情况:
- 早期发现阿尔茨海默病 (AD) 病理对于临床前干预至关重要.
- 血生物标志物,特别是酸化的tau217 (p-tau217),在预测粉样β (Aβ) 积累方面表现有前途.
研究的目的:
- 评估血生物标志物的准确性,以预测在认知不受损的老年人中Aβ正子发射断层扫描 (PET) 的阳性.
- 将单个生物标志物的预测性能与包括临床共变量在内的综合模型进行比较.
主要方法:
- 分析了A4和LEARN研究中1,407名认知不受损的老年人的数据.
- 使用接收器操作特征分析评估血p-tau217,p-tau181,Aβ42/40比率和其他生物标志物.
- 生物标志物模型的比较,包括和没有共同变量,如年龄,性别和阿波利波蛋白E (APOE) ε4基因型.
主要成果:
- 血p-tau217表现出与Aβ PET状态 (AUC 0.85) 最强的个人关联.
- 结合p-tau217,p-tau181,Aβ42,年龄,性别和APOE ε4的组合模型实现了最高的诊断准确性 (AUC 0.87).
- 综合模型在预测Aβ PET阳性方面明显优于单个生物标志物.
结论:
- 血p-tau217,特别是当与其他生物标志物和临床因素相结合时,提供了一种可靠的方法来预测无症状老年人中的Aβ PET阳性.
- 这种全面的生物标志物概况可以帮助临床前试验查,识别潜在的Aβ病理的个体,并可能减少对PET扫描的依赖.
相关概念视频
Amyloid Fibrils
12.0K
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,...
12.0K
Amyloid Fibrils
6.4K
6.4K
Revisionist Views of Adolescent and Adult Cognition
311
A revisionist approach to Jean Piaget's theory of cognitive development has brought new insights that challenge and reinterpret his established ideas. Piaget proposed that the formal operational stage, emerging in adolescence, represents the culmination of cognitive maturity. During this stage, individuals are said to develop abstract thinking, engage in systematic problem-solving, and show a form of egocentrism, believing others are as preoccupied with their behavior as they are...
311
Cognitive Dissonance
37.5K
Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
37.5K
Position-effect Variegation
7.1K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
7.1K
Predicting Molecular Geometry
46.0K
VSEPR Theory for Determination of Electron Pair Geometries
46.0K


