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Clin Chem:利用LC-MS/MS定量评估肾小球滤过率的代谢产物

2019-07-20 gladiator MedSci原创

临床实践指南推荐使用基于血清肌酐(eGFRcr)、胱抑素C (eGFRcys)或两者(eGFRcr-cys)的验证方程对肾小球滤过率(eGFR)进行评估。然而,与测量的GFR (mGFR)相比,目前只有egfr -cys符合推荐的性能标准。本研究的目标是基于一组代谢物开发一种更精确的eGFR方法,但测量指标不含肌酐、半胱氨酸抑制素C或人口统计学变量。

临床实践指南推荐使用基于血清肌酐(eGFRcr)、胱抑素C (eGFRcys)或两者(eGFRcr-cys)的验证方程对肾小球滤过率(eGFR)进行评估。然而,与测量的GFR (mGFR)相比,目前只有egfr -cys符合推荐的性能标准。本研究的目标是基于一组代谢物开发一种更精确的eGFR方法,但测量指标不含肌酐、半胱氨酸抑制素C或人口统计学变量。

研究人员建立乙酰苏氨酸、苯乙酰谷氨酰胺、伪吖啶、色氨酸的超高效液相色谱串联质谱分析方法,并进行为期20天的多仪器分析验证。该试验纳入2424名参与者,研究数据来自4项独立研究的mGFR。随后,在随机子集(n = 1615)中建立了一个新的GFR方程(eGFRmet),并对其余参与者(n = 809)进行了评估。性能评估为较大误差的频率[估计值与mGFR至少有30%的差异(1 - P30);目标< 10%)

研究表明,该方法的平均不准确度较好(10%的分析内,≤6.9%的分析间),线性度在定量范围内(r2 > 0.98),分析物回收率稳定(98.5%-113%)。没有偏移和干扰,能够建立分析物稳定性。此外,eGFRmet验证组中的1-P3010.0%)比eGFRcr13.1%)和eGFRcys12.0%)更准确,但eGFRcr-cys较差(8.7%)。结合代谢物,肌酐,胱抑素C和人口统计学,可得出最准确的方程(7.0%)。两个方程都没有人口亚群之间的实质性差异。

研究表明,新的eGFRmet方程可以作为GFR估计的验证性检验。

原始出处:

Tiffany A. Freed, Josef Coresh,Validation of a Metabolite Panel for a More Accurate Estimation of Glomerular Filtration Rate Using Quantitative LC-MS/MS

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