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Original Article
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Volume 358:676-688 February 14, 2008 Number 7
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B-Cell Depletion with Rituximab in Relapsing–Remitting Multiple Sclerosis
Stephen L. Hauser, M.D., Emmanuelle Waubant, M.D., Ph.D., Douglas L. Arnold, M.D., Timothy Vollmer, M.D., Jack Antel, M.D., Robert J. Fox, M.D., Amit Bar-Or, M.D., Michael Panzara, M.D., Neena Sarkar, Ph.D., Sunil Agarwal, M.D., Annette Langer-Gould, M.D., Ph.D., Craig H. Smith, M.D., for the HERMES Trial Group

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ABSTRACT

Background There is increasing evidence that B lymphocytes are involved in the pathogenesis of multiple sclerosis, and they may be a therapeutic target. Rituximab, a monoclonal antibody, selectively targets and depletes CD20+ B lymphocytes.

Methods In a phase 2, double-blind, 48-week trial involving 104 patients with relapsing–remitting multiple sclerosis, we assigned 69 patients to receive 1000 mg of intravenous rituximab and 35 patients to receive placebo on days 1 and 15. The primary end point was the total count of gadolinium-enhancing lesions detected on magnetic resonance imaging scans of the brain at weeks 12, 16, 20, and 24. Clinical outcomes included safety, the proportion of patients who had relapses, and the annualized rate of relapse.

Results As compared with patients who received placebo, patients who received rituximab had reduced counts of total gadolinium-enhancing lesions at weeks 12, 16, 20, and 24 (P<0.001) and of total new gadolinium-enhancing lesions over the same period (P<0.001); these results were sustained for 48 weeks (P<0.001). As compared with patients in the placebo group, the proportion of patients in the rituximab group with relapses was significantly reduced at week 24 (14.5% vs. 34.3%, P=0.02) and week 48 (20.3% vs. 40.0%, P=0.04). More patients in the rituximab group than in the placebo group had adverse events within 24 hours after the first infusion, most of which were mild-to-moderate events; after the second infusion, the numbers of events were similar in the two groups.

Conclusions A single course of rituximab reduced inflammatory brain lesions and clinical relapses for 48 weeks. This trial was not designed to assess long-term safety or to detect uncommon adverse events. The data provide evidence of B-cell involvement in the pathophysiology of relapsing–remitting multiple sclerosis. (ClinicalTrials.gov number, NCT00097188 [ClinicalTrials.gov] .)


Source Information

From the Department of Neurology, University of California at San Francisco, San Francisco (S.L.H., E.W.); Montreal Neurological Institute, McGill University (D.L.A., J.A., A.B.-O.), and NeuroRx Research (D.L.A.) — both in Montreal; Barrow Neurology Clinics, Phoenix, AZ (T.V.); Mellen Center for Multiple Sclerosis, Cleveland Clinic, Cleveland (R.J.F.); Biogen Idec, Cambridge, MA (M.P.); and Genentech, South San Francisco, CA (N.S., S.A., A.L.-G., C.H.S.).

Address reprint requests to Dr. Hauser at the Department of Neurology, University of California at San Francisco, 505 Parnassus Ave., Box 0114, San Francisco, CA 94143-0114, or at hausers{at}neurology.ucsf.edu.

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Related Letters:

Rituximab in Relapsing–Remitting Multiple Sclerosis
Schrijver H. M., De Palma R., Sementa A., Chaudhuri A., Behan P. O., Hauser S. L., Waubant E., Bar-Or A., the HERMES Trial Group
Extract | Full Text | PDF  
N Engl J Med 2008; 358:2645-2647, Jun 12, 2008. Correspondence

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