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Background/Aim: It is well-known that inflammatory bowel disease (IBD) poses an increased, yet not definitely estimated, risk of colitis-associated colon cancer (CAC), which is considered a more aggressive and distinct in both genetic and molecular levels clinical entity compared to sporadic colorectal cancer (CRC). The present review discusses the cytokine networks involved in CAC-based translational findings from suitable animal models of the disease. Moreover, we summarize the most prominent data concerning the role of Th1, Th2, Th17 and anti-inflammatory cytokines in the pathogenesis of CAC. Last, we briefly address the controversies between basic science findings in IBD and CAC and suggest further directions regarding research on cytokines. This review should serve as a primer for clinicians and surgeons to understand the rapidly evolving field of cytokines in the context of CAC. Materials and Methods: The MEDLINE database was thoroughly searched using the keywords: cytokines, colitis-associated cancer, animal models, carcinogenesis. Additional articles were gathered and evaluated.
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To systematically evaluate the efficacy of antibacterial therapy in ulcerative colitis, we carried out a meta-analysis of controlled clinical trials. Within the time period 1966 through September 2006, PUBMED, EMBASE, and SCOPUS were searched for clinical trial studies that investigated the efficacy of antibiotics in ulcerative colitis. We considered clinical remission as our key outcome of interest. Of 122 studies, 10 randomized placebo-controlled clinical trials matched our criteria and were included in the analysis (530 patients). All the studies used antibiotics as an adjunct therapy to conventional treatment of ulcerative colitis (i.e., corticosteroids and 5-aminosalycilic acid). Pooling of these trials yielded odds ratio (OR) of 2.14 (95% confidence interval [CI], 1.48-3.09; P<0.0001) in favor of antimicrobial therapy. Meta-analysis of short-term trials (5-14 days) showed a higher rate of clinical remission in patients treated with antibiotics (OR, 2.02; 95% CI, 1.36-3). These results suggest that adjunctive antibacterial therapy is effective for induction of clinical remission in ulcerative colitis.