生物标志物 生物标志物
Patrick J Lao1,2, Anna C Smith1, Natalie C Edwards1
1Columbia University Irving Medical Center, New York, NY, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
一些患有唐氏综合征 (DS) 的成年人抵抗阿尔茨海默病 (AD) 生物标志物. 保持认知稳定的老年DS个体表现出较低的粉样蛋白和白质过强度 (WMH),而低粉样蛋白的人则减少了tau和微血.
科学领域:
- 神经退行性疾病 神经退行性疾病
- 遗传学与衰老的关系
- 生物标志物发现发现
背景情况:
- 阿尔茨海默病协会研究框架认为,所有患有唐氏综合征 (DS) 的成年人都会患上阿尔茨海默病 (AD).
- 然而,一些患有DS的老年人并没有表现出AD生物标志物或认知能力下降,尽管有遗传倾向.
- 这项研究调查了DS个体的脑血管和负担,这些个体的粉样蛋白水平低于预期.
研究的目的:
- 为了探索与唐氏综合征的老年人之间和脑血管疾病负担的差异.
- 确定导致AD生物标志物发育在DS群体内变化的因素.
- 为了比较认知稳定的DS个体和粉样蛋白积累较低的个体的生物标志物概况.
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) 研究的259名患有DS的成年人的数据.
- 评估参与者使用血管MRI (WMH,PVS,心脏病发作,微型血液),粉样蛋白PET和蛋白PET.
- 根据认知稳定性,与阿尔茨海默病发病相对的年龄以及粉样蛋白PET残留物进行分类.
主要成果:
- 认知稳定的DS老年人具有较低的粉样蛋白和后部白质过强度 (WMH).
- 粉样蛋白水平在最低的第五百分位数中的个体表现出减少的积和更少的微型血液.
- 在DS中,与年龄相关的认知稳定性与AD生物标志物和脑血管变化的独特模式有关.
结论:
- 患有DS的老年人的认知稳定性与较低的粉样蛋白和后部WMH有关.
- 在老年DS个体中,持续的低粉样蛋白水平与降低的病理和微型血液相关.
- 需要进一步的研究来发现影响DS生物标志物和临床变异性的保护因素.
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