临床表现 临床表现
Catherine E Munro1,2, Abigail LaCasse3, Jessie Fanglu Fu4,5
1Harvard Medical School, Boston, MA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
概括
在认知正常的老年人中,抑郁症状恶化与高粉样蛋白水平相结合,预测数字时钟绘图测试 (DCT) 的下降. 这突显了即使在临床前阶段对认知变化的脆弱性.
科学领域:
- 神经科学是一个神经科学.
- 老年学是一门学科.
- 精神病学是一个精神病学.
背景情况:
- 数字时钟绘图测试 (DCT) 评估执行功能,信息处理和视觉空间能力.
- DCT的表现可以区分轻度认知障碍与阿尔茨海默病 (AD) 痴呆症,并与临床前AD病理学有关.
- 粉样蛋白水平可能会缓解抑郁症和认知表现之间的关系.
研究的目的:
- 调查抑郁症状的纵向变化是否会影响DCT得分.
- 为了确定基线粉样蛋白水平是否会影响抑郁症状与DCT表现之间的关系.
主要方法:
- 从哈佛老年大脑研究中评估了90名认知正常的老年人.
- 每年使用DCT和老年抑郁量表 (GDS),平均随访时间为5.7年.
- PiB-PET扫描测量了基线粉样蛋白水平;回归模型分析了GDS斜率,时间和粉样蛋白在DCT得分上的相互作用.
主要成果:
- 随着时间的推移,抑郁症状的斜率本身并不能显著预测纵向DCT得分.
- 一个显著的三方相互作用显示,基线粉样蛋白负担较高和抑郁症状增加的个体显示DCT性能下降.
- 这种相互作用表明这个子组的DCT性能随着时间的推移而下降 (β=-8.78,p=0.004).
结论:
- 在认知正常的老年人中,基线粉样蛋白升高和抑郁症状恶化与DCT加速下降有关.
- 这些发现表明,患有高粉样蛋白和恶化的抑郁症的个体特别容易受到临床前认知衰退的影响.
- 在老年人中监测情绪障碍,特别是那些粉样蛋白负担高的人,对于早期发现认知变化的临床重要.
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