Quantification of urinary PGEm, 6-keto PGF1α and 2,3-dinor-6-keto PGF1α by UFLC–MS/MS before and after exercise

Eicosanoids play an important role in the evaluation of pro-inflammatory responses and in the safety and toxicity of novel therapeutic agents. This work describes a high-throughput UFLCMS/MS method for the analysis of three urinary prostanoid biomarkers of pro-inflammatory responses, tetranor PGEm, 6-keto PGF1α and 2,3-dinor-6-keto PFG1α. Nine male volunteers of various age and fitness level participated in this study. Six provided pre- and post-exercise samples and three provided intraday samples. Tetranor PGEm and 6-keto PGF1α increased significantly in patients after exercise (p < 0.017 and p < 0.029). In individual patient sets, tetranor PGEm levels increased from 1.5- to 6-fold pre- vs. post-exercise, levels of 6-keto PGF1α increased more dramatically from 2- to 55-fold pre- vs. post-exercise. The prostanoid 2,3-dinor-6-keto PGF1α remained unchanged post-exercise. Data was normalized to urinary creatinine concentration, which increased approximately 40% post-exercise.