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CCLM:LC-MSMS分析尿液中的皮质醇

2018-06-29 MedSci MedSci原创

24小时尿游离皮质醇(UFC)测定可用于库欣综合征(CS)的筛查和随访。由于免疫分析方法缺乏对UFC测量的特异性,因此,目前推荐使用高效液相色谱联用质谱仪(LC-MSMS)。我们的研究目的是比较使用四个独立实验室中执行的四种LC-MSMS方法UFC测量的结果,以评估实验室间的一致性。 将24小时尿样(78名健康志愿者和20名CS患者)的等分试样送到四个不同的实验室进行分析。在液-液或固-液萃取之

24小时尿游离皮质醇(UFC)测定可用于库欣综合征(CS)的筛查和随访。由于免疫分析方法缺乏对UFC测量的特异性,因此,目前推荐使用高效液相色谱联用质谱仪(LC-MSMS)。我们的研究目的是比较使用四个独立实验室中执行的四种LC-MSMS方法UFC测量的结果,以评估实验室间的一致性。

24小时尿样(78名健康志愿者和20CS患者)的等分试样送到四个不同的实验室进行分析。在液-液或固-液萃取之后,使用四种不同的LC-MSMS测定法测定UFC

研究发现UFC的内部和交互式变异系数均低于10%。外部质控结果没有显著差异。UFC正常范围(由健康志愿者建立)分别为17-126,15-134,12-11827-157nmol /天。健康志愿者UFC分类和CS患者的第95百分位阈值相似。然而,对于极端的UFC值(<50> 270 nmol /天),出现了负偏差或正偏差。

研究表明,即使对于高度特异性的方法,如LC-MSMS,也会出现结果差异。因此,验证LC-MSMS方法,包括确定参考范围是至关重要。

原始出处:

Brossaud, Julie, LC-MSMS assays of urinary cortisol, a comparison between four in-house assays

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    2018-06-29 明月清辉

    谢谢分享.学习了

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