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  • Title: Overview of the clinical development of rituximab: first monoclonal antibody approved for the treatment of lymphoma.
    Author: Grillo-López AJ, White CA, Varns C, Shen D, Wei A, McClure A, Dallaire BK.
    Journal: Semin Oncol; 1999 Oct; 26(5 Suppl 14):66-73. PubMed ID: 10561020.
    Abstract:
    Rituximab (Rituxan; IDEC Pharmaceuticals, San Diego, CA, and Genentech, Inc, San Francisco, CA) is a genetically engineered monoclonal antibody for the treatment of non-Hodgkin's lymphoma. This chimeric mouse/human, immunoglobulin GI kappa anti-CD20 antibody mediates complement-dependent cell lysis and antibody-dependent cellular cytotoxicity. It also has been shown to sensitize chemoresistant human lymphoma cell lines and to induce apoptosis. It was approved by the Food and Drug Administration on November 26, 1997, for the indication of relapsed or refractory, CD-20 positive, B-cell, low-grade or follicular non-Hodgkin's lymphoma Rituximab is the first monoclonal antibody approved for the treatment of cancer and the first single agent approved specifically for therapy of a lymphoma. The recommended dose is rituximab 375 mg/m2 intravenously weekly x4 infusions. Treatment is well tolerated and outpatient therapy is feasible. Adverse events are mostly grades I and 2, occurring primarily with the first infusion. In a phase II single-agent clinical trial, the overall response rate was 50%, with a median time to progression in responders of 10.2 months. In a larger multicenter trial involving 166 patients, the overall response rate was 48% with 6% complete and 42% partial responses. Median time to progression for responders was 13.2 months and median duration of response was 11.6 months. A 40% response rate has been observed on re-treatment with rituximab. Activity also has been seen in patients with bulky disease. Combination studies have been performed with interferon, cyclophosphamide/doxorubicin/vincristine/prednisone, and radioimmunotherapy. Rituximab, the first monoclonal antibody approved for the treatment of cancer, is safe and effective in treating patients with relapsed or refractory, CD-20 positive, B-cell, low-grade or follicular non-Hodgkin's lymphoma.
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