血Aβ和p-tau217的结合改善了在没有痴呆症的老年人中大脑粉样蛋白的检测
Yoshiki Niimi1, Shorena Janelidze2, Kenichiro Sato1,3
1Unit for Early and Exploratory Clinical Development, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan.
Alzheimer's research & therapy
|May 22, 2024
概括
血液生物标志物包括血氨基酸β (Aβ) 和酸化 (p-tau217) 正确预测早期阿尔茨海默病 (AD) 中的氨基酸-PET阳性. 将这些标记物结合起来,可以提高临床试验的查效率,用于临床前和临床前AD.
科学领域:
- 神经科学是一个神经科学.
- 生物标志物发现发现
- 临床试验 临床试验
背景情况:
- 早期发现阿尔茨海默病 (AD) 对于临床试验的成功至关重要.
- 查无症状和非痴呆症患者的粉样蛋白阳性需要有效的基于血液的生物标志物.
研究的目的:
- 评估与血粉样蛋白-β (Aβ) 相关的生物标志物和化陶在氨酸217 (p-tau217) 的联合生物标志物的实用性,用于预测异常的Aβ-波色子发射断层扫描 (PET) 扫描.
- 评估这些生物标志物的预测性能在临床前和临床前AD阶段.
主要方法:
- 这是一项涉及两个不同的队列的横截面研究:日本临床前和前期AD的试验准备队列 (J-TRC) 和瑞典的BioFINDER研究.
- 血Aβ (Aβ42,Aβ40) 和p-tau217水平分别使用免疫沉-MALDI TOF质谱和免疫试验进行测量.
- 进行了Aβ-PET成像,并分析了结合生物标志物,年龄,性别和APOE基因型的预测模型.
主要成果:
- 血Aβ42 / Aβ40比率和p-tau217单独显示在检测异常的Aβ-PET中中度到高精度.
- 结合血生物标志物,年龄,性别和APOE基因型显著提高了预测准确性,曲线下的面积 (AUC) 值在J-TRC中达到0.955,在BioFINDER中达到0.938.
- 生物标志物的组合在预测不同疾病阶段的Aβ-PET阳性方面表现良好.
结论:
- 血Aβ相关生物标志物和p-tau217的组合在预测Aβ-PET阳性方面表现出高效.
- 结合临床信息,如年龄,性别和APOE基因型,进一步提高了临床前AD的预测.
- 这些血生物标志物为阿尔茨海默病早期临床试验的预选参与者提供了非常有用的工具.
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