Enhanced formation of advanced oxidation protein products in IBD
Article first published online: 22 JAN 2008
Copyright © 2008 Crohn's & Colitis Foundation of America, Inc.
Inflammatory Bowel Diseases
Volume 14, Issue 6, pages 794–802, June 2008
How to Cite
Krzystek-Korpacka, M., Neubauer, K., Berdowska, I., Boehm, D., Zielinski, B., Petryszyn, P., Terlecki, G., Paradowski, L. and Gamian, A. (2008), Enhanced formation of advanced oxidation protein products in IBD. Inflamm Bowel Dis, 14: 794–802. doi: 10.1002/ibd.20383
- Issue published online: 5 MAY 2008
- Article first published online: 22 JAN 2008
- Manuscript Accepted: 4 DEC 2007
- Manuscript Received: 1 AUG 2007
- inflammatory bowel disease (IBD);
- Crohn's disease;
- ulcerative colitis;
- advanced oxidation protein products (AOPPs);
- oxidative stress
Background: Advanced oxidation protein products (AOPPs) are new protein markers of oxidative stress with pro-inflammatory properties, accumulated in many pathological conditions. The issue of their enhanced formation in IBD has not been addressed yet.
Methods: The concentration of relative AOPPs (rAOPP; concentration of AOPPs divided by albumin level) were measured in 68 subjects with ulcerative colitis (UC), 50 subjects with Crohn's disease (CD) and 45 healthy volunteers, and related to disease phenotype, clinical and biochemical activity, and therapeutic strategy. Diagnostic utility of rAOPP was evaluated by ROC analysis.
Results: In comparison with controls (1.367 μmol/g), rAOPP were increased in inactive (1.778 μmol/g, P = 0.053) and active (1.895 μmol/g, P = 0.013) UC and in active (1.847 μmol/g, P = 0.003) CD. In CD, but not UC, rAOPP correlated with disease activity (r = 0.42, P = 0.013). Significant correlations with the inflammatory/malnutrition indices-erythrocyte sedimentation rate (ESR) (r = 0.53), leukocytes (r = 0.33), platelets (r = 0.38), IL-6 (r = 0.36), and transferrin (r = −0.35) were demonstrated in CD. In UC, rAOPP correlated only with ESR (r = 0.35) and IL-6 (r = 0.30). Instead, associations with antioxidant dismutase (r = 0.29) and catalase (r = 0.22) were observed. The diagnostic power of rAOPP in discriminating diseased from non-diseased subjects was less than that of C-reactive protein (CRP). Simultaneous determination of rAOPP and CRP did not significantly improve the power of single CRP determination.
Conclusions: IBD was associated with enhanced formation of AOPP, which differed between C and UC with respect to the relationship between rAOPP and disease activity, inflammatory and antioxidant response. These differences may reflect divergent ways that oxidative stress develops in CD and UC. The diagnostic power of rAOPP was insufficient for its clinical application.
(Inflamm Bowel Dis 2008)