视网膜血管变化与阿尔茨海默病的基于PET的生物标志物有关:试点研究
Kristie Hing Chi Leung1,2, Victor T T Chan1,3, Bonnie Yin Ka Lam4
1Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, China.
Journal of Alzheimer's disease reports
|March 4, 2025
概括
视网膜成像显示,阿尔茨海默氏病 (AD) 与较小的动脉小动脉碎形尺寸和增加的静脉曲性有关. 这些变化与粉样β和生物标志物相关,表明视网膜是AD的诊断窗口.
科学领域:
- 眼科医生 眼科 眼科
- 神经学 神经学
- 医疗成像医学成像
背景情况:
- 视网膜为与阿尔茨海默病 (AD) 病理生理学相关的大脑微血管结构变化提供了一个非侵入性窗口.
- 以前的研究将临床AD诊断与视网膜血管架构联系起来,但在灵敏度,特异性和成像范围方面存在限制.
研究的目的:
- 为了比较视网膜血管在个体与阳离子发射断层扫描 (PET) 生物标志物确认的阿尔茨海默病 (AD) 对照.
- 用超广场 (UWF) 成像来调查视网膜更大区域的变化.
主要方法:
- 从社区和诊所招募了参与者;通过PET扫描确认了AD,用于粉样蛋白-β (Aβ) 和tau.
- 采用超广场 (UWF) 扫描激光眼镜,用于视网膜成像.
- 使用新加坡I船舶评估 (SIVA) 软件进行量化船舶参数,并对共变量进行调整.
主要成果:
- 确诊的AD (18/39) 个体在UWF图像中表现出显著较低的动脉小裂纹尺寸 (p=0.032).
- 在AD患者的标准 fundus 图像中观察到较大的静脉形 (p=0.011).
- 显著的Aβ和tau负担与降低的动脉动脉口径相关 (OR 3.857,p=0.048).
结论:
- 在UWF视网膜成像中降低了动脉分片尺寸,与生物标志物确认的AD中与大脑Aβ和tau负担有关.
- 这项试点研究表明,广场视网膜成像为检测AD相关的微血管变化提供了有价值的视角.
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