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Background  Prostaglandin E-major urinary metabolite (PGE-MUM) may be a novel biomarker for evaluating disease activity in ulcerative colitis (UC). We compared its usefulness to that of the fecal immunochemical occult blood test (FIT).    Methods  PGE-MUM and FIT measurements were performed of 92 urinary and fecal samples obtained from 60 patients with UC. Endoscopic activity was determined by Mayo endoscopic subscore (eMayo) and Ulcerative Colitis Endoscopic Index of Severity (UCEIS) score.    Results  PGE-MUM levels and FIT results showed a significant correlation with respect to eMayo ( P  <  0.001 and  P  < 0.001, respectively), and there was a significant difference in PGE-MUM values between the groups below eMayo1 and above eMayo2 ( P  = 0.012). Both biomarkers were significantly correlated with the UCEIS score ( P  < 0.001 and  P  < 0.001, respectively), and the PGE-MUM values were significantly different between groups below UCEIS1 and above UCEIS2 ( P  = 0.012). PGE-MUM and FIT were significantly correlated with eMayo in the group with a disease duration < 5 years ( P  = 0.041 and  P  < 0.001, respectively). Although PGE-MUM and eMayo differed significantly between groups over 5 years ( P  = 0.012), FIT was not correlated with eMayo ( P  = 0.101).    Conclusions  PGE-MUM is useful as a biomarker as FIT for evaluating the endoscopic activity, particularly in long-term affected patients with UC.

Prostaglandin E-major urinary metabolite versus fecal immunochemical occult blood test as a biomarker for patient with ulcerative colitis