生物标志物 生物标志物
Jesús Garcia Castro1, Lídia Vaqué-Alcázar2, Lawren VandeVrede3
1Sant Pau Memory Unit, Hospital de la Santa Creu i Sant Pau - Biomedical Research Institute Sant Pau - Universitat Autònoma de Barcelona, Barcelona, Barcelona, Spain.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
利用基于MRI的模型进行参与者选择和结果测量,可显著降低渐进性上核麻 (PSP) 和皮质核退行 (CBD) 临床试验的样本大小要求,提高试验效率.
科学领域:
- 神经退行性疾病 神经退行性疾病
- 神经成像是一种神经成像.
- 临床试验设计 临床试验设计
背景情况:
- 渐进性超核性麻 (PSP) 和皮质核性退行 (CBD) 是严重的神经退行性疾病,缺乏有效的治疗方法和可靠的生物标志物.
- 临床试验受到PSP和CBD之间重叠的症状和不完美的临床病理相关性所阻碍.
- 来自MRI的模型已经在预测PSP和CBD病理学方面表现出准确性.
研究的目的:
- 评估基于MRI的参与者选择和成像结果对PSP和CBD假设临床试验的样本大小估计的影响.
- 通过结合先进的神经成像技术来确定临床试验设计的效率增长.
主要方法:
- 利用了来自4个重复多发症神经成像计划 (4RTNI) 的84名参与者的MRI数据,他们被诊断为理查德森综合征 (RS) 或皮质皮质综合征 (CBS).
- 应用MRI衍生模型来预测PSP,CBD或其他病理,并确定区域缩的MRI签名.
- 计算了假设试验所需的样本大小,旨在在12个月内检测疾病进展率减少30% (通过MRI签名或PSPRS测量).
主要成果:
- 磁力共振成像模型预测了PSP,CBD和其他病理,分别在46%,26%和27%的参与者中.
- 基于MRI的选择和结果减少了PSP试验的样本大小64% (121对336名参与者) 和CBS试验 (160对1301名参与者) 的样本大小.
- 对于PSP进展的关键MRI标记区域包括中脑和前皮层厚度;对于CBD,中脑/pons体积和前脑/脑内皮层厚度是显著的.
结论:
- 使用基线MRI进行诊断确定性的参与者选择,加上MRI测量作为试验结果,可以显著提高4R病症的2期临床试验的效率.
- 这些发现表明,对于PSP和CBD的未来临床试验设计,应该采取更简单的方法.
- 计划在Davunetide试验队列中进行复制,以验证这些结果.
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