在典型的实验室储存温度下,使用体积吸收微量采样 (VAMS) 收集的人类血液中炎症标志物的稳定性
1Sangui Bio Pty Ltd, Sydney, Australia; The Kolling Institute, Sydney, Australia.
Cytokine
|September 10, 2023
概括
干血斑点 (DBS) 和体积吸收微采样 (VAMS) 的细胞因子稳定性因储存温度而异. 建议在4°C或更低的温度下储存样本,以便随着时间的推移优化细胞因子的保存.
科学领域:
- 生物标志物的分析分析.
- 样本稳定性的研究.
- 微量采样技术 微量采样技术
背景情况:
- 干血斑点 (DBS) 和体积吸收微采样 (VAMS) 用于样品的长期存储,假设分析物的稳定性.
- 虽然代谢物是稳定的,但细胞因子等血液蛋白在储存期间可能会降解,即使在-80°C.
- 目前DBS和VAMS的存储标准通常依赖于室温,可能会影响细胞因子的完整性.
研究的目的:
- 为了评估存储在VAMS设备中的细胞因子在不同温度下长达5个月的稳定性.
- 为了比较室温储存与冷藏和冷条件的性能,用于细胞因子量化.
- 评估储存条件对细胞因子回收和VAMS样品变异性的影响.
主要方法:
- 从健康参与者的血液中添加了复合性细胞因子,并收集到30μL的VAMS装置中.
- 在室温,4°C或-20°C下存储VAMS设备长达5个月;液体提取物在-80°C下存储.
- 使用Luminex®在各种时间点量化细胞因子水平 (多达31种分析物),包括长达8个月的远程临床研究.
主要成果:
- 室温储存显示13/21分析样品的显著损失相比4°C在5个月.
- 在4°C或更低的温度下储存通常保持了细胞因子的稳定性,最佳温度因分析物而异.
- 一些分析物质,如fractalkine,无论存储情况如何,都表现出不良的恢复,归因于提取效率低下;指针样本显示出比静脉样本更高的变异性.
结论:
- 在VAMS设备中,室温储存对于细胞因子稳定性是不理想的.
- 冷藏 (4°C) 或冷 (-20°C) 的存储显著提高了细胞因子在5个月的稳定性.
- 了解分析物特异性稳定性对于设计纵向VAMS研究至关重要;储存在4°C或更低的温度是有益的.
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