与主观认知衰退相比,客观的微妙认知困难与粉样β和陶沉积的关联
Xiaoxie Mao1,2,3, Anqi Li4, Ying Wang5
1School of Medicine, Xiamen University, 361102, Xiamen, Fujian, China.
European journal of nuclear medicine and molecular imaging
|January 21, 2025
概括
客观微妙认知障碍 (Obj-SCD) 显示了较高的粉样蛋白β (Aβ) 和蛋白水平,这表明与阿尔茨海默病病理学的联系比主观认知衰退 (SCD) 更强. 在这两组中,Aβ预测记忆力下降.
科学领域:
- 神经退行性疾病的神经退行性疾病
- 生物标志物研究的研究.
- 认知障碍 认知障碍是一种认知障碍.
背景情况:
- 阿尔茨海默病 (AD) 的特点是粉样β (Aβ) 和病理.
- 区分主观认知衰退 (SCD) 和客观微妙认知困难 (Obj-SCD) 对于早期AD检测至关重要.
- 了解这些早期认知阶段的差异化生物标志物概况对于有针对性的干预措施至关重要.
研究的目的:
- 为了比较阿米洛伊德-β (Aβ) 和沉积及其在Obj-SCD和SCD患者之间的纵向变化.
- 在这些不同的认知群体中调查Aβ,tau和认知衰退之间的关联.
- 为了确定Obj-SCD是否与AD病理比SCD更密切地联系在一起.
主要方法:
- 来自阿尔茨海默病神经成像计划 (ADNI) 和华山队伍的参与者的分析.
- 利用一般线性模型 (GLM) 来比较基线和纵向的Aβ和tau水平:Obj-SCD,SCD,主观记忆问题 (SMC) 和健康对照 (HC).
- 检查了Aβ PET,tau PET和基线Aβ水平与认知衰退之间的相关性.
主要成果:
- 与HC相比,Obj-SCD参与者表现出明显更高的基线Aβ和tau水平,以及较高的年度积累,特别是在布拉克阶段III-IV.
- 与HC相比,SCD/SMC参与者在年度Aβ和tau变化中没有显著差异.
- 基线Aβ PET与Obj-SCD和SCD/SMC组的年度tau PET变化相关. 基线Aβ强烈预测了Obj-SCD和SCD/SMC的早期记忆衰退.
结论:
- 与SCD相比,Obj-SCD与核心阿尔茨海默病生物标志物 (Aβ和tau) 相关性更强.
- 在Obj-SCD和在一定程度上,SCD/SMC中,Aβ病理似乎驱动了tau的进展和随后的记忆衰退.
- 需要进行进一步的纵向研究,以充分阐明临床前AD中Aβ和tau之间的时间关系.
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