大脑年龄作为临床前认知衰退的准确生物标志物:来自12年纵向研究的证据
Odelia Elkana1, Iman Beheshti2,
1Behavioral Sciences, Academic College of Tel Aviv-Yaffo, Tel Aviv, Israel. Odelia.elkana@gmail.com.
Journal of neurology
|October 2, 2025
概括
从MRI扫描中预测的大脑年龄差异 (大脑-PAD) 可以检测早期阿尔茨海默病风险. 这种机器学习生物标志物显示出监测老年人认知衰退的前景.
科学领域:
- 神经成像是一种神经成像.
- 老年学是一门学科.
- 机器学习 机器学习
背景情况:
- 在老年人中早期发现认知能力下降,特别是临床前阿尔茨海默病 (AD),对于干预至关重要.
- 在AD研究中,T1加权的MRI是常见的,但其早期检测和监测能力需要进一步描述.
研究的目的:
- 评估T1加权的MRI衍生生物标志物的实用性,以确定临床前AD脆弱性和纵向进展.
- 评估大脑预测年龄差异 (大脑-PAD) 作为认知衰老的敏感生物标志物.
主要方法:
- 分析了超过12年的224名认知不受损的老年人的纵向T1加权MRI数据.
- 分层参与者转化为轻度认知障碍 (n=112) 和稳定对照 (n=112).
- 检查了四个MRI生物标志物:大脑-PAD,平均皮质厚度,AD-皮质特征和海马体积.
主要成果:
- 大脑PAD显示了与未来转换 (p=0.0009) 和最高分类准确度 (AUC=0.66) 最强的关联.
- 纵向分析显示,转换器的脑PAD具有显著的正倾斜,表明大脑衰老轨迹的分歧.
- 海马体积和AD皮质签名在两组中都显示出类似的下降;平均皮质厚度的效用有限.
结论:
- 脑PAD是从使用机器学习的T1加权MRI中获得的,是一种敏感的,独立于性能的生物标志物.
- 大脑PAD有助于早期风险分层和监测在临床前AD窗口期间的认知衰老轨迹.
关键词:
衰老的衰老 衰老的衰老阿尔茨海默氏症是阿尔茨海默氏症的一种疾病.大脑年龄预测预测认知能力下降 认知能力下降皮层厚度 皮层厚度河马体积的体积是什么纵向分析是一种纵向分析.机器学习 机器学习权重为T1的核磁共振成像更多相关视频
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