纵向阿尔茨海默病队列中的CSF生物标志物:分析前的挑战
Erin M Jonaitis1,2,3, Beckie Jeffers1,2,3, Monica VandenLangenberg2,3
1Wisconsin Alzheimer's Institute, School of Medicine and Public Health, University of Wisconsin -Madison, Madison, WI, United States.
Clinical chemistry
|March 2, 2024
概括
对阿尔茨海默病的自动脑脊液 (CSF) 测试显示出高可靠性. 然而,像管类型这样的分析前因素显著影响结果,这需要对纵向研究进行仔细考虑.
科学领域:
- 神经科学是一个神经科学.
- 生物标志物发现发现
- 临床诊断 临床诊断 临床诊断
背景情况:
- 阿尔茨海默病 (AD) 诊断依赖于脑脊液 (CSF) 生物标志物,但它们对分析前变量的敏感性带来了挑战.
- 标准化CSF样本处理对于可靠的阿尔茨海默病诊断至关重要.
- 自动化免疫测试平台有可能提高CSF生物标志物分析的效率和一致性.
研究的目的:
- 评估自动免疫测试对脑脊液 (CSF) 中阿尔茨海默病生物标志物的可靠性和有效性.
- 评估预分析因素,包括样本类型和储存对CSF生物标志物测量的影响.
- 为了确定CSF生物标志物结果与粉样质正子辐射断层扫描 (PET) 成像的一致性.
主要方法:
- 通过使用Elecsys cobas e 601平台分析了两个队伍中的727名参与者的脑脊液 (CSF) 样本.
- 测量结果包括粉样β1-42 (Aβ42),酸化tau181 (pTau181) 和总tau (tTau).
- 评估了储存管类型,提取和冷的重复性和影响;在238名参与者中检查了与粉样蛋白PET的一致性.
主要成果:
- 对于CSF生物标志物测量,Elecsys平台显示出高可重复性 (类内相关性[ICC]≥0.9).
- 储存管类型显著影响了Aβ42和pTau181水平,尽管粉样蛋白PET阳性的区分精度仍然很强 (AUC:Aβ42,0.87;pTau181/Aβ42,0.96).
- 预测粉样PET状态的最佳生物标志物值因管型而异.
结论:
- 在现实条件下,Elecsys平台对CSF生物标志物分析具有很高的可重复性.
- 分析前的因素,特别是储管类型,对生物标记物测量有很大的影响,需要仔细的标准化.
- 在解释CSF生物标志物的纵向变化时,建议谨慎,因为预分析变异性对CSF生物标志物的显著影响.
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