生物标志物 生物标志物
Jr-Jiun Liou1, Tales Santini1, Milos D Ikonomovic1
1University of Pittsburgh, Pittsburgh, PA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
概括
在唐氏综合征 (DS) 中,粉样蛋白-β (Aβ) PET负担与先进的边缘主导性与年龄相关的TDP-43脑病变神经病理变化 (LATE-NC) 有联系,但不是大脑体积. 阿尔茨海默氏病研究中心 (ADRC) 的数据显示,Aβ与粉样蛋白斑块和结相关.
科学领域:
- 神经科学是一个神经科学.
- 神经病理学神经病理学
- 生物标志物 生物标志物
背景情况:
- 晚期阿尔茨海默氏病 (AD) 涉及β-粉样蛋白 (Aβ) 和边缘主导的与年龄相关的TDP-43脑病变神经病理变化 (LATE-NC).
- 唐氏综合征 (DS) 中Aβ和LATE-NC之间的关系,这是一种易患早期AD的人群,尚未检查.
- 这项研究比较了DS和晚期AD队列中的Aβ沉积和神经病理变化.
研究的目的:
- 调查唐氏综合征 (DS) 患者死前Aβ沉积和死后神经病理变化之间的关联.
- 将这些关联与在晚发性阿尔茨海默病 (AD) 的队列中观察到的关联进行比较.
主要方法:
- 利用了来自阿尔茨海默氏症生物标志物联盟 - 唐氏综合征 (ABC-DS) 和匹兹堡阿尔茨海默氏症研究中心 (ADRC) 的数据.
- 评估了AβPET扫描 (半球体),死后MRI体积 (杏仁体,海马体) 和详细的组织病理学.
- 使用统计分析,包括t测试,线性回归和ANCOVA来比较队列并检查关联.
主要成果:
- 与AD队列相比,DS队列具有类似的Aβ负担,但在诊断时年龄较小,大脑体积较小,CERAD分数更高.
- 死亡前Aβ负担与任何一组的死亡后杏仁体或海马体体积都没有相关性.
- 在DS中,较高的Aβ负担与高级LATE-NC阶段有关,而在AD队列中,Aβ负担与粉样质斑块和神经纤维状结相关.
结论:
- 在唐氏综合征中,死前AβPET负担与晚期NC阶段的晚期相关,而不是死后的大脑体积.
- 在晚期发病的AD队列中,Aβ负担与已建立的AD病理标记相关:粉样质斑块和神经纤维状结.
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