生物标志物 生物标志物
Daniel C Bowie1,2, Yara Yakoub2,3,4, Valentin Ourry2,4
1McGill University, Montreal, QC, Canada.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
概括
阿尔茨海默病 (AD) 病理学,由粉样蛋白和 (A / T) 标记物表示,与嗅觉识别能力的下降有关. 这项研究证实,A/T阳性预示着随着时间的推移,嗅觉功能的恶化.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 生物标志物 生物标志物
背景情况:
- 之前的研究将脑脊液p-tau181与嗅觉和听觉障碍联系起来.
- 对于神经感官衰退的阿尔茨海默病 (AD) 病理学的预测价值尚未得到充分理解.
研究的目的:
- 研究粉样蛋白和 (A/T) 状态和神经感官功能 (气味识别和中央听觉处理) 之间的横截面和纵向关系.
- 用PET成像和基于等离子体的A/T生物标志物验证发现.
主要方法:
- 来自PREVENT-AD队列的233名参与者接受了粉样蛋白和蛋白PET扫描,气味识别 (UPSIT) 和中央听觉处理 (DSI) 测试.
- 血生物标志物 (Aβ42,Aβ40,p-tau217) 在一个子集 (n=208) 中进行了分析.
- 统计分析包括Kruskal-Wallis,Dunn的测试和线性混合效应模型,以评估群体差异和纵向变化.
主要成果:
- 基于PET的分析显示,与粉素阳性/阴性 (A+T-) 个体相比,粉素阴性/阴性 (A-T-) 个体的气味识别 (OI) 分数较低.
- 基于等离子体的分类显示,与A+T和A-T-.相比,粉样蛋白阳性/tau阳性 (A+T+) 个体的OI得分较低.
- 从长度来看,在A+T+组中观察到OI的最显著下降,特别是在使用血生物标志物时.
结论:
- 阿尔茨海默病的病理学,特别是粉样蛋白和 (A + T +) 的存在,与嗅觉识别的下降有关.
- 进一步的研究应该探索这些关联在其他神经感官领域,如视觉和味觉.
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