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基于MRM的LC-MS方法用于准确的C-量测量

Will Grothoff¹, Ivan Khodakivskyi¹, Aleks Shin¹

¹Pathology & Anatomical Sciences, University of Missouri, 1 Hospital Drive, Columbia, MO 65211, USA.

Journal of mass spectrometry and advances in the clinical lab

|March 17, 2025

概括

我们开发了一种质谱法,用于准确的C-量测量,改善糖尿病诊断. 这种方法显示出高准确度和精度,支持糖尿病的临床决策.

科学领域:

生物化学生物化学
临床化学临床化学
分析化学分析化学

背景情况:

C-是一种β细胞功能和糖尿病的生物标志物.
目前的C-测定缺乏标准化,限制了临床实用性.
准确的C-测量对于糖尿病类型的区分和管理至关重要.

研究的目的:

开发和验证基于质谱学的方法,用于精确的C-量测量.
在临床环境中建立可靠的C-测量试验.
为满足对标准化C-测量的需求.

主要方法:

开发了一种使用多重反应监测 (MRM) 的液体染色体质谱法 (LC-MS) 方法.
用同位素标记的C-作为内部标准.
采用固体相提取和离子交换进行样本丰富,随后进行Glu-C消化.

主要成果:

该试验显示出出色的线性性和较低的量化极限 (0.058nmol/L).
在日间CV<9.6%和日内CV<8.9%的情况下,获得了高精度.
该方法与参考方法有很强的相关性 (r2 = 0.95),并且干扰最小.

结论:

开发的LC-MS/MRM方法提供了准确的C-量化.
该方法可以作为现有参考方法的宝贵补充工具.
它有助于完善C-参考系统并改善糖尿病诊断.

关键词:

这是一种C-.糖尿病是血型糖尿病的一种疾病.这就是LC-MS.标准化标准化标准化

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