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Updated: Jun 10, 2025

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错误折叠的α同核素与阿尔茨海默氏症蛋白质病变的同时发生

Erin M Jonaitis, Karen MacLeod, Jennifer Lamoureux

medRxiv : the preprint server for health sciences

|October 17, 2024

概括

错误折叠的α-synuclein (syn) 种子在患有阿尔茨海默氏症 (AD) 风险的人群中被检测到. 同核素的阳性与阿尔茨海默病生物标志物和更快的认知衰退相关,这表明它在痴呆症进展中的作用.

科学领域:

神经科学是一个神经科学.
生物标志物发现发现
痴呆症研究痴呆症研究

背景情况:

多种病因痴呆症需要体内标志物用于共同病理,例如错误折叠的α-synuclein (syn).
种子放大试验 (SAA) 提供了一种检测syn聚合物 (syn种子) 的方法.
在阿尔茨海默氏症 (AD) 风险队列中研究同位症病理是至关重要的.

研究的目的:

使用同核素种子放大试验 (synSAA) 测量错误折叠的合成聚合物 (syn-seeds).
为了检查合成种子和阿尔茨海默病 (AD) 生物标志物之间的关系.
评估合成种子与AD风险队列的认知衰退的关联.

主要方法:

分析了AD风险队列中的420名参与者的脑脊液 (CSF).
进行了同核素种子放大试验 (synSAA).
结果与酸化 (T),β-粉样蛋白 (A) 水平和纵向认知结果进行了比较.

主要成果:

同核素阳性 (synSAA+) 与酸化 (T) (36%对20%,p=0.011) 有关.
与synSAA-个人 (p=0.00050) 相比,SynSAA+个体的认知障碍 (10%的MCI,10%的痴呆症) 的患病率更高.
在synSAA+参与者的认知表现在数字符号测试中下降了大约40%的速度.

结论:

在阿尔茨海默病 (AD) 风险队列中,普遍的α-synuclein (syn) 共同病理得到了支持.
同核素种子可能表明增加的风险或共同病理的存在,有助于认知能力下降.
需要进一步的研究来了解综合病理和疾病进展之间的关系.

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