Journal
INTERNATIONAL IMMUNOPHARMACOLOGY
Volume 54, Issue -, Pages 112-117Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.intimp.2017.11.003
Keywords
Ankylosing spondylitis; NSAIDs; Inflammation; Spondyloarthritis; beta-D-Mannuronic acid; M2000
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Objective: To evaluate the efficacy, safety and tolerability of beta-D-mannuronic acid (M2000) in the treatment of ankylosing spondylitis (AS). Methods: The study was a 12-week randomized, double-blind, placebo-controlled, phase I/II clinical trial with 3 treatment arms: placebo, beta-D-mannuronic acid and naproxen. Patients who had AS according to the modified New York criteria, with active disease at baseline were eligible for study. Primary outcome measure was the Assessment of SpondyloArthritis international Society (ASAS) 20 response rate at week 12. Results: Of the 85 randomized patients, 27 were allocated to receive placebo, 28 naproxen, and 30 beta-D-mannuronic acid. There were no statistically significant differences between treatment groups at baseline. Of the patients receiving beta-D-mannuronic acid, 57.7% achieved an ASAS20 response at week 12, compared with 59% of the patients in the naproxen group (P > 0.05) and 19% of the patients in the placebo group (P = 0.007). In comparison with patients receiving placebo over the 12-week treatment period, those receiving beta-D-mannuronic acid and naproxen demonstrated statistically significantly greater improvement in all secondary endpoints. Interestingly, beta-D-mannuronic acid reduced some parameters associated with inflammation more effectively than naproxen and placebo. The incidence of gastrointestinal and other adverse events were higher on naproxen than on beta-D-mannuronic acid and placebo. Conclusion: The present study demonstrated similar efficacy, but with a more favorable safety profile for beta-D-mannuronic acid than naproxen and, therefore, suggest that beta-D-mannuronic acid is suitable for the management of AS.
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