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在临床前阿尔茨海默病中化217,PET和认知的同时变化
Philip S Insel1, Niklas Mattsson-Carlgren2,3,4, Oliver Langford5
1Department of Psychiatry and Behavioral Sciences, University of California, San Francisco.
JAMA neurology
|August 25, 2025
概括
化217 (p-tau217) 和正子发射断层扫描 (PET) 对跟踪阿尔茨海默病的进展具有前景. 这些生物标志物可以预测认知变化并帮助选择临床试验的参与者.
科学领域:
- 神经科学
- 生物标志物研究
- 阿尔茨海默病的治疗方法
背景情况:
- 开发用于阿尔茨海默病 (AD) 的疾病修饰疗法是关键的研究优先事项.
- 需要准确的生物标志物来评估临床试验中的治疗疗效.
研究的目的:
- 在AD治疗试验中评估化217 (p- tau217) 和正子发射断层扫描 (PET) 的潜力.
- 确定这些生物标志物是否可以作为疾病进展和治疗反应的可靠指标.
主要方法:
- 分析了无症状阿尔茨海默氏症 (A4) 抗粉体治疗研究和长度评估粉体风险和神经退行 (LEARN) 研究的数据.
- 参与者接受了18F- 贝塔皮尔PET成像,以评估粉样β (Aβ) 状态.
- 使用纵向血p-tau217水平和18F-flortaucipirPET成像测量了tau病理.
- 使用临床前阿尔茨海默症认知复合物 (PACC) 评估认知功能.
主要成果:
- 在艾米洛伊德β阳性 (Aβ+) 参与者中,tau PET在36个月的时间内在下环中显示出最大的积累.
- 脑内皮层的p- tau217水平和tau PET与PACC评分的纵向变化有很强的联系.
- 在前面的PET区域的tau变化与同时发生的认知变化相关.
- 血p-tau217水平在Aβ+参与者中显著增加,并且在全血样本中与认知变化有轻微的关联.
结论:
- 对阿尔茨海默病的预后和实时跟踪有价值.
- 血p-tau217可以在明显损伤之前预测认知变化,帮助参与者选择试验.
- 基于图像的tau测量和血p-tau217可以增强疾病修饰效应的检测,并完善AD试验中的治疗点.
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