参考蛋白质用于改善核心1和核心2阿尔茨海默病CSF和血生物标志物
Linda Karlsson1, Shorena Janelidze1, Nicolas R Barthélemy2,3
1Clinical Memory Research Unit, Department of Clinical Sciences in Malmö, Lund University, SE-22184 Lund, Sweden.
Brain : a journal of neurology
|October 6, 2025
概括
将阿尔茨海默病 (AD) 液体生物标志物如tau和粉样蛋白-β (Aβ) 规范化为参考蛋白 (Aβ40或np-tau) 显著提高了它们在反映大脑病理方面的准确性. 这种规范化提高了这些生物标志物的可靠性,用于AD检测和监测.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 生物标志物发现发现
背景情况:
- 脑脊液 (CSF) 和血中的液体生物标志物对于阿尔茨海默病 (AD) 检测至关重要.
- 个体间的差异可能会影响这些生物标志物的可靠性.
- 对参考蛋白质的规范化可能会提高生物标志物的稳定性.
研究的目的:
- 调查将CSF和血AD生物标志物正常化为参考蛋白 (粉样β40 (Aβ40) 和非酸化 (np-tau)) 是否改善它们与大脑和Aβ病理学的关联.
- 评估正常化对生物标志物可靠性和代表AD病理负载的准确性的影响.
主要方法:
- 使用瑞典BioFINDER-2队列 (n=1702) 和三个独立队列进行验证.
- 单独比较tau/Aβ-PET负荷和流体生物标志物 (例如,p-tau,Aβ42,MTBR-tau243) 与正常化为Aβ40或np-tau之间的关联.
- 采用单变量线性回归和质谱/免疫测试技术.
主要成果:
- 脊髓中Aβ40的正常化显著加强了脊髓中AD生物标志物与tau/Aβ-PET之间的关联.
- 对CSF的规范化np-tau改善了与Aβ-PET的一致性.
- 血生物标志物与tau-PET和Aβ-PET的关联因正常化到血Aβ40或np-tau而增强.
- 在纵向分析中,Aβ40正常化减少了个体间的变异性.
结论:
- 脑液和血生物标志物与参考蛋白质 (如Aβ40或np-tau) 的正常化增强了它们与大脑tau和Aβ病理学的关联.
- 这种规范化策略提高了现有的AD流体生物标志物的准确性.
- 这些发现支持使用规范化生物标志物来更可靠地检测和监测AD.
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