Background: Anemia is an important complication of inflammatory bowel disease (IBD). Recent data suggest that hepcidin is a major mediator of anemia with a central role in iron homeostasis and metabolism. The aim of this study was to evaluate the serum levels of hepcidin and its prohormone, prohepcidin, in patients with IBD in comparison with healthy controls.
Methods: One hundred patients with IBD [49 ulcerative colitis (UC), 51 Crohn's disease (CD)] and 102 healthy controls were enrolled. Serum hepcidin and prohepcidin levels were measured by commercially available enzyme-linked immunosorbent assays kits. Their relationship with clinical and laboratory parameters of UC and CD was assessed.
Results: Median hepcidin levels were significantly higher in both patients with UC and patients with CD compared with healthy controls (P<0.0001). Median prohepcidin levels were significantly lower in patients with IBD compared with healthy controls (P = 0.03). In the univariate analysis, serum hepcidin was significantly negatively correlated (r = -0.36, P = 0.0003), whereas serum prohepcidin was positively correlated (r = 0.65, P<0.0001) with the hemoglobin levels. Significant correlations of both hepcidin (r = 0.34, P = 0.0007) and prohepcidin (r = -0.21, P = 0.04) with ferritin levels were found in patients with IBD. Serum hepcidin was also correlated with disease activity (for UC, r = 0.36, P = 0.009) and C-reactive protein (r = 0.29, P = 0.004). After multivariate analysis serum hepcidin levels remained significantly correlated with ferritin (P = 0.0008) and disease activity (for UC, P = 0.004).
Conclusion: Serum hepcidin and prohepcidin levels are significantly altered in patients with IBD compared with healthy controls. This finding suggests a substantial role of these two hormones in the development of anemia in IBD.
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