Rituximab therapy for refractory scleritis: results of a phase I/II dose-ranging randomized, clinical trial.

E Suhler, Lyndell Lim, Robert Beardsley, Tracy Giles, Sirichai Pasadhika, Shelly Lee, Alexandre de Saint Sardos, Nicholas Butler, Justine Smith, James Rosenbaum

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    Abstract

    Objective: To determine whether rituximab, a monoclonal antibody against the B-lymphocyte antigen CD20, is effective in the treatment of refractory noninfectious scleritis.

    Design: Prospective, dose-ranging, randomized, double-masked phase I/II clinical trial.

    Participants: Twelve patients with noninfectious scleritis refractory to systemic corticosteroid and ≥1 other systemic immunosuppressive agent were enrolled from January 2007 to March 2010. Intervention: Subjects were randomly assigned to 500 (n = 5) or 1000 mg (n = 7) dosing arms of rituximab intravenous infusions (500 or 1000 mg), given at study days 1 and 15. Initial responders with breakthrough inflammation after study week 24 were offered treatment with an additional cycle of 2 open-label rituximab 1000 mg infusions.

    Main Outcome Measures: Primary outcomes were reduction of inflammation, as measured with a validated scleritis disease grading scale (SGS) and reduction in corticosteroid dose by ≥50%. Patients were characterized as responders to study therapy if ≥1 of these endpoints showed improvement and neither showed evidence of worsening. Secondary outcomes were improvement in visual acuity, reduction in pain, and improvement in patient and physician-reported global health assessment.

    Results: Of 12 enrolled patients, 9 met the SGS endpoint at or before week 24, and 4 additionally were able to reduce corticosteroid dose by ≥50%. With regard to secondary outcome measures, 11 and 9 patients showed improvement in patient and physician global health scores, respectively, and 7 patients had reduction in pain. Of 9 initial responders, 7 experienced breakthrough inflammation after 24 weeks and were treated with a second cycle of rituximab infusions. Four patients had significant objective or subjective worsening within 8 weeks of receiving rituximab; this event was averted in subsequent patients by treatment with peri-infusional oral corticosteroid. No other significant adverse events were noted. No differences in efficacy, toxicity, or likelihood of retreatment were noted between the dosing arms.

    Conclusions: Rituximab was effective treatment for 9 of 12 enrolled patients with refractory, noninfectious scleritis at 24 weeks, although 7 required reinfusion with rituximab to maintain inflammatory control. The treatment was well-tolerated, and peri-infusional inflammatory exacerbations were managed successfully with oral corticosteroids. Further long-term studies are warranted to determine the safety and efficacy of rituximab in treating noninfectious scleritis and other ocular inflammatory diseases.

    Original languageEnglish
    Pages (from-to)1885-1891
    Number of pages7
    JournalOphthalmology
    Volume121
    Issue number10
    DOIs
    Publication statusPublished - 2014

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  • Cite this

    Suhler, E., Lim, L., Beardsley, R., Giles, T., Pasadhika, S., Lee, S., de Saint Sardos, A., Butler, N., Smith, J., & Rosenbaum, J. (2014). Rituximab therapy for refractory scleritis: results of a phase I/II dose-ranging randomized, clinical trial. Ophthalmology, 121(10), 1885-1891. https://doi.org/10.1016/j.ophtha.2014.04.044