ArticleInflammatory bowel diseases2025
Myeloperoxidase Enzyme Activity in Feces Reflects Endoscopic Severity in Inflammatory Bowel Disease.
Article in Inflammatory bowel diseases, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Identification of key bioactive compounds of medicine-food homologous substances and their multi-target intervention effects in ulcerative colitis treatment.Naunyn-Schmiedeberg's archives of pharmacology · 2026Article
- Factors Associated With Loss of Fecal Biomarker Accuracy During Routine Assessment of Inflammatory Bowel Disease.JGH open : an open access journal of gastroenterology and hepatology · 2026Article
- Neutrophils as critical orchestrators of chronic inflammation.Cellular & molecular immunology · 2026Review
- The Roles of Four Neutrophil-Derived Proteins as Non-Invasive Biomarkers in the Assessment of Inflammatory Bowel Disease.Journal of inflammation research · 2026Review
- Neutrophils and NETs in Pathophysiology and Treatment of Inflammatory Bowel Disease.International journal of molecular sciences · 2025Review
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Authors and funding
9 authors.
Funding
Abstract
backgroundConcentrations of the neutrophil protein myeloperoxidase are elevated in the feces of individuals with endoscopically active inflammatory bowel disease (IBD). Its enzyme activity could give an immediate readout of endoscopic inflammation. We investigated whether fecal myeloperoxidase activity (fMPOa) is associated with IBD endoscopic inflammation. We also investigated whether myeloperoxidase promotes oxidative stress in IBD.
methodsMyeloperoxidase enzyme activity was measured using an enzyme-linked immunosorbent assay (ELISA fMPOa), a novel CM-sepharose extraction assay (CM-S fMPOa), or by quantifying urinary glutathione sulfonamide (GSA) by tandem mass spectrometry. GSA is a specific biomarker of myeloperoxidase activity. IBD activity was assessed using the ulcerative colitis endoscopic index of severity or the simple endoscopic score for Crohn's disease (SES-CD). Spearman's correlation and receiver operating characteristic curves evaluated biomarker utility.
resultsIBD patients (n = 172) were recruited prospectively (ulcerative colitis, n = 72; Crohn's disease, n = 100). fMPO was mostly active. Its enzyme activity, measured either as ELISA fMPOa or CM-S fMPOa, correlated with endoscopic inflammation in both ulcerative colitis and Crohn's disease. Urinary GSA is also correlated with endoscopic disease inflammation. Correlations of urinary GSA with disease measures and other biomarkers were stronger in ulcerative colitis than in Crohn's disease.
conclusionsMyeloperoxidase is active in IBD and its enzyme activity is a reliable marker of IBD endoscopic inflammation. Our results with the CM-S fMPOa assay demonstrate the potential for an immediate and accurate measure of fMPO enzyme activity as a robust, low-cost test for IBD activity. Myeloperoxidase may contribute to tissue damage in IBD.
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