长期冷储存对卡帕自由轻链指数稳定性的影响
Martin Schmidauer1, Klaus Berek1, Gabriel Bsteh2,3
1Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
Clinical chemistry and laboratory medicine
|May 28, 2025
概括
脑脊液和血清样本在-20°C的冷储存不会影响无卡帕轻链 (k-FLC) 指数. 这种稳定性确保了多发性硬化症患者随着时间的推移可靠的诊断标志物评估.
科学领域:
- 临床化学 临床化学
- 神经学 神经学
- 生物化学 生物化学
背景情况:
- 无卡帕光链 (k-FLC) 指数是一种用于诊断和监测多发性硬化症等神经疾病的生物标志物.
- 标准实验室程序通常涉及冷生物样本进行储存,这引发了关于分析物的潜在降解及其对诊断准确性的影响的问题.
研究的目的:
- 为了确定冷存储在-20°C的持续时间是否会影响多发性硬化症患者的 κ-FLC指数.
- 评估冷样本中 κ-FLC 和白蛋白度随时间的稳定性.
主要方法:
- 来自多发性硬化症患者的脑脊液 (CSF) 和血清样本,储存在-20°C下,进行了分析.
- 在冷存储期间前后测量 κ-FLC 和白蛋白度.
- 使用公式计算 κ-FLC 指数: (CSF κ-FLC/血清 κ-FLC) / (CSF 白蛋白/血清白蛋白).
主要成果:
- 对70名患者的分析表明,虽然脑液 κ-FLC,血清 κ-FLC,脑液白蛋白和血清白蛋白的绝对度随着储存时间的延长而下降,但计算的 κ-FLC 指数保持稳定.
- κ-FLC指数的稳定性归因于使用CSF/血清比率,这使观察到的度变化正常化.
结论:
- 生物样品在-20°C的冷储存对 κ-FLC指数没有临床显著的影响.
- κ-FLC指数是一个强大的生物标志物,不受典型的冷储存时间的影响,支持其在多发性硬化症的临床诊断中可靠使用.
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