Abstract
Background
Ulcerative colitis (UC) is an intractable colonic disease, and it shows several endoscopic findings. Recently, it was reported that the expression level of mucosal tumor necrosis factor alpha (TNF-α) was useful for predicting patient response to infliximab. However, no data regarding the value of endoscopic findings to predict treatment efficacy or cytokine expression level exist.
Objective
We investigated the expression of leukocyte adhesion-related molecules and cytokines in colonic mucosa and compared it to endoscopic findings.
Methods
One hundred and fifty-nine patients were enrolled. Tissue samples were obtained by colonic biopsy from patients with UC. Colitis activity was determined by Matts’ criteria. The degree of mRNA expression of TNF-α, interferon gamma (IFN-γ), interleukin (IL)-8, IL-17A, and mucosal vascular addressin adhesion molecule-1 (MAdCAM-1) in mucosal samples was determined by real-time quantitative polymerase chain reaction. These expression levels were compared with the degree of Matts’ grade and individual endoscopic findings.
Results
The expression of TNF-α, IFN-γ, IL-8, IL-17A, and MAdCAM-1 mRNA significantly increased as Matts’ endoscopic grade elevated. Actively inflamed mucosa with spontaneous hemorrhage revealed a significantly increased expression level of TNF-α mRNA than that without spontaneous hemorrhage. No other individual endoscopic parameter was significantly correlated with the expression level of TNF-α mRNA.
Conclusions
Inflamed mucosa with spontaneous hemorrhage may suggest increased expression of TNF-α mRNA levels in colonic mucosa of UC patients, which could predict a lower response to infliximab treatment and more aggressive induction regime or change to other therapy should be taken into account.
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Abbreviations
- IBD:
-
Inflammatory bowel disease
- IL:
-
Interleukin
- IFN-γ:
-
Interferon gamma
- MAdCAM-1:
-
Mucosal vascular addressin cell adhesion molecule-
- PCR:
-
Polymerase chain reaction
- TNF-α:
-
Tumor necrosis factor alpha
- UC:
-
Ulcerative colitis
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Acknowledgments
This research was supported by grants from the National Defense Medical College and by Intractable Disease Health and Labor Sciences Research grants from the Ministry of Health, Labor, and Welfare.
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The authors have nothing to disclose.
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This manuscript was presented as poster presentation at Digestive Disease week 2012 (San Diego, CA, 19–22 May).
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Hozumi, H., Hokari, R., Kurihara, C. et al. Endoscopic finding of spontaneous hemorrhage correlates with tumor necrosis factor alpha expression in colonic mucosa of patients with ulcerative colitis. Int J Colorectal Dis 28, 1049–1055 (2013). https://doi.org/10.1007/s00384-013-1654-4
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DOI: https://doi.org/10.1007/s00384-013-1654-4