生物标志物 生物标志物
Vijaya L Reddy1, Jesse M Cedarbaum1, John Seibyl1
1Yale University School of Medicine, New Haven, CT, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
在REM睡眠行为障碍 (RBD) 中,多巴胺转运体 (DaT) 阳性与认知衰退有关,而α-synuclein (αSyn) 阳性令人惊的是,在这个临床前synucleinopathy阶段与更好的认知功能相关.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 生物标志物研究 生物标志物研究
背景情况:
- 阿尔法-同核素 (αSyn) 蛋白与阿尔茨海默氏症和帕金森症等神经退行性疾病有关.
- 脑脊液 (CSF) αSyn播种活性升高和条形多巴胺活性降低与同核蛋白病变的认知衰退有关.
- 雷姆睡眠行为障碍 (RBD) 是同核病变的临床前阶段,使其成为早期检测的关键焦点.
研究的目的:
- 在RBD患者中研究CSFαSyn聚合和条纹性多巴胺缺陷之间的关系.
- 评估这些因素对RBD患者认知表现的影响.
- 探索潜在的生物标志物来预测向临床同核蛋白病变转化现象.
主要方法:
- 三十五名RBD参与者 (年龄为51-80,MoCA>23) 接受了123-IIOFLUPAN SPECT多巴胺转运体 (DaT) 扫描和腰部穿刺.
- 分析了CSFαSyn水平,并根据DaT扫描结果对参与者进行了分类 (DaT阳性,中等,负).
- 用蒙特利尔认知评估 (MoCA) 和参与者的子集的额外测试来评估认知功能.
主要成果:
- 在71%的参与者 (25/35) 中观察到CSF αSyn阳性.
- 达特阳性与较低的认知分数有关,尽管在统计学上并不显著.
- 与αSyn阴性参与者相比,αSyn阳性参与者显示工作记忆指数和MoCA得分显著更高 (p=0.05).
结论:
- 在RBD中DaT阳性可能表明认知障碍,与同核蛋白病变的进展保持一致.
- 意想不到的是,这个队列中的αSyn阳性与更好的认知表现相关.
- 需要进一步的研究来验证这些生物标志物用于预测转化为临床同核蛋白病的现象转化.
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