在衍生后通过LC-MS/MS对人体血中的甲基马龙酸进行定量分析
Danhong Shen1, Wei Chen1, Jindi Liu1
1Vito Biomedical Research Institute, Hangzhou 310024, Zhejiang, China.
概括
这项研究引入了血甲基马龙酸 (MMA) 的快速室温衍生方法,这是一个关键的维生素B12生物标志物. 这项新技术提高了MMA检测灵敏度和临床诊断中的准确性.
科学领域:
- 临床化学 临床化学
- 分析化学 分析化学
- 生物标记分析 生物标记分析
背景情况:
- 甲基马龙酸 (MMA) 是维生素B12缺乏的一个重要的逆转生物标志物.
- 目前用于MMA分析的方法面临着低灵敏度和同位素干扰的挑战.
- 需要改进的分析技术来准确临床评估维生素B12状态.
研究的目的:
- 为等离子MMA开发一种快速而敏感的衍生方法.
- 为了克服与MMA分析相关的染色学挑战.
- 在临床环境中提高MMA量化的准确性和可靠性.
主要方法:
- 开发了使用EDC和TFEA形成三乙烯胺衍生物的等离子MMA的室温衍生.
- 用蛋白质沉与三酸用于样本提取.
- 利用液体染色学-并联质谱法 (LC-MS/MS) 进行敏感和特定的MMA检测.
主要成果:
- 衍生方法在10分钟内实现了化.
- 在LC-MS/MS分析中增强MMA的信号噪声比.
- 在广泛的度范围内 (42.42711.9 nmol/L) 显示出出色的线性 (R2 = 0.9990) .
- 报告的高精度 (日内:2.44.4%,日间:2.62.8%) 和恢复 (97.9100.1%).
结论:
- 开发的快速衍生方法显著提高了MMA检测灵敏度,并减少了干扰.
- 这种技术为量化血MMA提供了一种强大而准确的方法.
- 该方法适用于需要可靠的维生素B12状态评估的常规临床诊断.
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