数字记忆评估和血pTau217使得高效的临床前阿尔茨海默氏症试验成为可能
Casey R Vanderlip1, Daniel L Gillen2, Joshua D Grill3
1Department of Neurobiology and Behavior, 1424 Biological Sciences III Irvine, University of California Irvine, Irvine, CA, 92697 USA.
The journal of prevention of Alzheimer's disease
|February 7, 2026
概括
数字记忆评估和血pTau217识别了患阿尔茨海默病进展高风险的个体. 这种双标记方法显著减少了临床试验样本大小和成本.
科学领域:
- 神经科学是一个神经科学.
- 生物标志物 生物标志物
- 临床试验 临床试验
背景情况:
- 临床前阿尔茨海默氏病 (AD) 试验要求参与者在认知上没有受损,但是氨基酸阳性的.
- 大多数参与者保持稳定,需要大样本规模和高成本,因为短期下降有限.
- 有效的丰富策略对于识别具有更高进展风险的个体至关重要.
研究的目的:
- 评估数字记忆评估 (DMA) 和化 tau 217 (pTau217) 能否识别出临床前阿尔茨海默症参与者具有认知和生物进展风险的高.
- 确定DMA和pTau217的结合是否会降低临床试验样本大小要求.
主要方法:
- 在无症状阿尔茨海默氏症 (A4) 研究中的抗粉样蛋白治疗数据的分析,这是一项为期240周的多中心随机临床试验.
- 包括1,169名65-85岁的认知不受损的粉样蛋白阳性成年人,具有基线DMA和血pTau217测量.
- 主要结局:临床前阿尔茨海默氏症认知组合 (PACC) 的变化;次要结局:其他认知措施和生物标志物变化 (粉样PET,pTau217,tau PET).
主要成果:
- 患有pTau217升高和DMA低的参与者表现出最显著的认知衰退,比队列平均水平提前83周达到PACC衰退.
- 没有任何标志物的个体表现出最小的衰退.
- 双重丰富减少了临床试验估计的样本大小75% (从3,252名参与者到818名参与者),并显示出更快的生物标志物增加.
结论:
- DMA和血pTau217的组合有效地识别了临床前AD中高风险个体的子集.
- 这种双标志物丰富策略允许更小,更短,更具成本效益的临床前AD试验.
- 支持针对性评估阿尔茨海默病的预防疗法.
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