评估将差分移动性谱度添加到LC-MS/MS工作流程中的好处,以应对具有挑战性的类固醇测量
Kayla Moehnke1, Pragya Sharma1, Jennifer Kemp1
1Department of Laboratory Medicine and Pathology, Division of Clinical Biochemistry and Immunology, Mayo Clinic, Rochester, MN 55905, USA.
概括
差分移动谱法 (DMS) 增强了液体染色学-并联质谱法 (LC-MS/MS) 以准确量化类固醇激素. 这种方法提高了复杂的生物样本中分析雌激素和葡萄糖皮质体的灵敏度和特异性.
科学领域:
- 分析化学 分析化学
- 生物化学 生物化学
- 内分泌学 在内分泌学.
背景情况:
- 精确量化类固醇激素 (雌激素,葡萄糖类皮质激素) 对于诊断内分泌疾病至关重要.
- 结构相似性和低度的类固醇存在分析挑战.
- 现有的方法需要增强的特异性和灵敏度,以进行可靠的测量.
研究的目的:
- 评估差分运动谱法 (DMS) 与LC-MS/MS结合用于类固醇激素分析.
- 评估对雌激素和葡萄糖皮质激素测量的特异性和灵敏性的改善.
- 为了确定DMS在复杂的生物基质如血清和头发中的实用性.
主要方法:
- 使用差分移动性光谱法 (DMS) 与液体染色学-并联质谱法 (LC-MS/MS).
- 使用 SelexION 配备的 Sciex 6500+ 质谱仪和 Thermo Scientific TLX-2 LC 系统.
- 在头皮头发中分析了血清中的雌激素和葡萄糖皮质类药物 (皮质醇,皮质醇).
主要成果:
- DMS显著降低了色谱干扰,并提高了信号噪声比 (雌醇高达420%,雌激素高达210%).
- DMS改善了信号对噪声的反应,并减少了皮质醇和皮质醇在头发中的干扰.
- 碎片离子协议得到改善,减少了皮质醇和皮质的度差异.
结论:
- DMS是一种有价值的补充技术LC-MS/MS用于类固醇激素量化.
- DMS提供直角分离,增强复杂矩阵中的分析性能.
- 这种方法提高了临床诊断中类固醇激素测量的准确性和可靠性.
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