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在人体血和尿液中通过液态染色学与质谱学相结合的皮质醇量测量:在参考人群和上腺意外瘤患者中的验证,分析和应用
Andressa Cristina Dos Santos Marques1, Bruna Brito1, Jéssica Gorett Brito Fontes1
1Federal University of Rio de Janeiro - UFRJ, Brazilian Doping Control Laboratory - LBCD, LADETEC, Av. Horácio Macedo, 1281 - Polo de Química - Bloco C - Cidade Universitária - Ιlha do Fundão, Rio de Janeiro, Brazil.
Clinica chimica acta; international journal of clinical chemistry
|November 18, 2024
概括
我们开发了精确的LC-MS/MS方法来定量尿液和血中的皮质醇. 这些经过验证的测试比临床诊断的免疫测试提供了更好的准确性.
科学领域:
- 临床化学 临床化学
- 分析化学 分析化学
- 生物化学 生物化学
背景情况:
- 皮质醇是一种关键的葡萄糖皮质激素激素,调节重要生理过程.
- 免疫试验往往缺乏特异性,导致皮质醇测量不准确.
- 准确的皮质醇量测量对于诊断各种健康状况至关重要.
研究的目的:
- 开发和验证用于皮质醇分析的强大的液体染色学-并联质谱法 (LC-MS/MS) 方法.
- 建立可靠的方法量化皮质醇在尿液和血样本.
- 为临床使用提供了传统免疫检测的准确替代品.
主要方法:
- 开发LC-MS/MS测定,使用尿液和血的替代矩阵.
- 样品的制备涉及酵素水解和固体相提取尿液,以及蛋白质沉等离子体.
- 高性能液体染色学 (HPLC) 在优化移动相条件的C8柱上进行.
- 检测是通过使用质谱仪在正模式下进行电喷射电离和选择反应监测来实现的.
主要成果:
- 为尿液 (1-200 ng/mL,r2=0.9950) 和血 (0.5-300 ng/mL,r2=0.9970) 建立了线性校准曲线.
- 这些方法表现出极好的选择性,精度,准确性和灵敏度 (尿液的LOQ:0.85 ng/mL,血的0.15 ng/mL).
- 经过验证的方法已成功地用于分析真实患者样本中的皮质醇水平.
结论:
- 开发的LC-MS/MS方法提供了生物矩阵中皮质醇的准确和可靠量化.
- 这些经过验证的测试比临床诊断的传统免疫测试有显著的改进.
- 在患者样本中的成功应用突显了这些新方法的临床实用性.
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