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  • Title: A phase 2, 24-week, randomized, placebo-controlled, double-blind study examining the efficacy and safety of an anti-interleukin-12 and -23 monoclonal antibody in patients with relapsing-remitting or secondary progressive multiple sclerosis.
    Author: Vollmer TL, Wynn DR, Alam MS, Valdes J.
    Journal: Mult Scler; 2011 Feb; 17(2):181-91. PubMed ID: 21135022.
    Abstract:
    BACKGROUND: Interleukins 12 and 23 (IL-12/23) have been implicated in multiple sclerosis (MS) pathogenesis. This study assessed the efficacy and safety of ABT-874, a monoclonal anti-IL-12/23 antibody, in active relapsing-remitting MS (RRMS) or secondary progressive MS (SPMS). METHODS: In this 24-week study, patients with RRMS or SPMS received ABT-874 200 mg every other week (EOW), ABT-874 200 mg every week (EW), or placebo. The cumulative number of gadolinium-enhanced lesions, relapse rate, disability progression, and adverse events were measured. RESULTS: 215 patients were randomized (ABT-874 200 mg EOW, N = 76; ABT-874 200 mg EW, N = 70; placebo, N = 69). At week 24, gadolinium-enhanced lesions were statistically significantly reduced with ABT-874 200 mg EOW vs. placebo (mean number [SD]: 5.4 [8.1] vs. 7.6 [14.4], p = 0.003), but not with ABT-874 200 mg EW (6.8 [11.3], p = 0.134). Mean relapse rate (relapses/y) was significantly lower for ABT-874 200 mg EW vs. placebo (0.1 [95% CI -0.0, 0.3] vs. 0.5 [0.2, 0.8], p = 0.007). Changes from baseline in disability scores and incidences of adverse events were not significantly different across treatment groups, although a numerically greater percentage of serious adverse events was reported for ABT-874 treatment groups. CONCLUSIONS: Although rates of adverse events were not significantly different between ABT-874 treatment groups and placebo, the magnitude of ABT-874 efficacy was less than that observed with other agents currently in development for MS treatment. Anti-IL-12/23 monotherapy does not appear to warrant further testing as monotherapy treatment for MS.
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