临床表现 临床表现
Bruna Bellaver1, Guilherme Povala1, Pamela C L Ferreira1
1University of Pittsburgh, Pittsburgh, PA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
概括
MK6240PET异常比血p-tau217和Flortaucipir更早出现,粉样β负担增加. 图PET和血p-tau217之间的不一致结果表明,不同的生物标志物出现,具有潜在的临床意义.
科学领域:
- 神经成像是一种神经成像.
- 生物标志物 生物标志物
- 阿尔茨海默氏症疾病研究研究
背景情况:
- 独特的TAU-PET追踪剂结合特性影响了阿尔茨海默病 (AD) 中的生物标志物轨迹.
- 调查tau PET标记物 (MK6240,Flortaucipir) 与与粉样β (Aβ) PET沉积相关的血p-tau217异常之间的关系.
- 评估tau PET,血p-tau217和认知表现之间的一致性.
研究的目的:
- 为了比较MK6240和Flortaucipir tau的PET阳性与血p-tau217异常的出现.
- 为了评估TAU PET和血p-tau217阳性度在AD连续体之间的一致性.
- 检查不一致的生物标志物配置和认知功能之间的关系.
主要方法:
- 分析了352名参与者 (HEAD研究) 的Aβ PET,tau PET (MK6240,Flortaucipir) 和血生物标志物 (p-tau217,GFAP).
- 模拟tau PET和血p-tau217轨迹作为Aβ负荷 (半角形) 的函数,使用Lowess.
- 根据对年轻个体 (≥2.5 z-score) 固定的z-score来定义生物标志物阳性.
主要成果:
- MK6240最早显示出异常 (22个百叶状体),其次是血p-tau217 (38个百叶状体) 和Flortaucipir (56个百叶状体).
- 在tau PET和血p-tau217阳性之间观察到高一致性 (∼80%).
- 不一致的病例 (例如,MK6240+/p-tau217或MK6240-/p-tau217+) 呈现出不同的Aβ负担和认知特征.
结论:
- 与血p-tau217和Flortaucipir相比,MK6240在较低的Aβ负载上检测出异常.
- PET和血p-tau217之间的显著不一致表明个体生物标志物出现的模式各不相同.
- 不一致群体中独特的认知概况突出了需要进一步研究的潜在临床意义.
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