Cytokine Expression of Microscopic Colitis Including Interleukin-17

• Published in: Gut and liver Vol. 9; no. 3; pp. 381 - 387
• Main Authors: Park, Eunkyoung, Park, Young Sook, Park, Dae Rim, Jung, Sung Ae, Han, Dong Soo, Jang, Byung Ik, Kim, Young Ho, Kim, Won Ho, Jo, Yun ju, Lee, Ki Ho, Lee, Won Mi, Kim, Eun Kyung, Koo, Hae Soo
• Format: Journal Article
• Language: English
• Published: Korea (South) Gut and Liver 01.05.2015; Gastroenterology Council for Gut and Liver; 거트앤리버 소화기연관학회협의회
• Subjects: Biopsy; colitis; Colitis, Microscopic - metabolism; collagenous; Colon - pathology; Cyclooxygenase 2 - metabolism; Cytokines - metabolism; Diarrhea - metabolism; Humans; immunohistochemistry; Interferon-gamma - metabolism; Interleukin-17 - metabolism; Intestinal Mucosa - pathology; lymphocytic; microscopic; NF-kappa B - metabolism; Nitric Oxide Synthase Type II - metabolism; Original; Tumor Necrosis Factor-alpha - metabolism; 내과학; Immunohistochemistry; Colitis, lymphocytic; Colitis, microscopic; Colitis, collagenous
• ISSN: 1976-2283; 2005-1212; 2005-1212
• DOI: 10.5009/gnl13439

Microscopic colitis is characterized by chronic watery diarrhea with specific pathological changes that can be diagnosed by microscopic examination. We performed immunohistochemical analysis of proinflammatory cytokines to investigate the pathogenic mechanism of microscopic colitis. This study consisted of six patients with lymphocytic colitis, six patients with collagenous colitis, and six patients with functional diarrhea but normal pathology. We performed an immunohistochemical analysis of the colonic mucosal biopsies to assess the expression of cyclo-oxygenase-2, interleukin-17, nuclear factor-κB, interferon-γ, inducible nitric oxide synthase, and tumor necrosis factor-α. We compared the quantity score of immunohistochemical staining among the groups. The microscopic colitis group showed significantly higher expression of cyclo-oxygenase-2, interleukin-17, nuclear factor-κB, and interferon-γ compared with the control group. Cytokine expression was similar between collagenous colitis and lymphocytic colitis. However, the expression of cyclo-oxygenase-2 was higher in collagenous colitis. Proinflammatory cytokines, including interleukin-17 and interferon-γ, are highly expressed in microscopic colitis. The expression of cyclo-oxygenase-2 was higher in collagenous colitis than in lymphocytic colitis. This study is the first on interleukin-17 expression in microscopic colitis patients.