Preclinical and phase I and II trials of rituximab.

  • 1 October 1999
    • journal article
    • review article
    • Vol. 26, 74-8
Abstract
The CD20 antigen is an attractive target for antibody-directed therapy due to its stable, high-level surface expression on normal and malignant B cells. Rituximab (Rituxan; IDEC Pharmaceuticals, San Diego, and Genentech, Inc, San Francisco, CA) is an anti-CD20 chimeric monoclonal antibody that has shown single-agent activity in phase I and II clinical trials in patients with B-cell non-Hodgkin's lymphoma. This antibody has a long serum half-life and low immunogenicity. Infusional symptoms are common with the initial infusion but rare with subsequent treatments. Temporary B-cell depletion occurs but has not been associated with immunodeficiency. The mechanism of action likely includes both immune-mediated effects and direct effects. The generally mild toxicity profile and excellent single-agent activity provide the rationale for use with or following chemotherapy. Additional studies evaluating these and other combinations are under way.

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