Clinical trial: a multicentre, randomized, double-blind, placebo-controlled, dose-finding, phase II study of subcutaneous interferon-beta-la in moderately active ulcerative colitis

Alimentary Pharmacology & Therapeutics
C Pena-RossiH Graffner

Abstract

Ulcerative colitis (UC) pathophysiology is characterized by an imbalance between pro- and anti-inflammatory cytokines. Interferon (IFN)-beta-1a has potent immunoregulatory properties, including stimulation of host defence mechanisms and thus represents a potential treatment. To extend pilot data and identify a suitable dose of IFN-beta-1a to achieve endoscopically confirmed remission (ECR) in patients with moderately active UC and to evaluate safety. In this multicentre, double-blind, placebo-controlled trial, adults with moderately active UC were randomized to IFN-beta-1a 44 or 66 microg, or placebo, subcutaneously three times weekly for 8 weeks, with a 4-week follow-up. Endoscopically-confirmed remission was observed in 23.4% [95% confidence interval (CI): 13.8-35.7] of placebo patients, 29.2% (95% CI: 18.6-41.8) of the IFN-beta-la 44 microg group and 20.0% (950% CI: 11.1-31.8) of the 66 microg group (P = 0.45). Improvements with IFN-beta-1a 44 microg were greater than with placebo for most secondary efficacy outcomes, although significance was not achieved. Placebo response rates were higher than expected from previous trials. Adverse events were similar to the known safety profile of IFN treatment. Interferon-beta-1a was ge...Continue Reading

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