Abstract
▴ 90Yttrium (90Y) ibritumomab tiuxetan is a radiolabeled murine anti-CD20 monoclonal antibody that binds specifically to the CD20 antigen on normal and malignant B lymphocytes. It has antitumor activity as a result of emission of β particles. It is administered as part of a therapeutic regimen which includes rituximab, a monoclonal antibody which produces antibody-dependent cell-and complement-mediated cytotoxicity.
▴ 90Y ibritumomab tiuxetan, when given as part of the recommended regimen, produced significantly higher overall (80 vs 56%: p = 0.002) and complete response rates (30 vs 16%: p = 0.04) than rituximab alone in a randomized nonblind study in patients with relapsed or refractory low-grade, follicular or transformed non-Hodgkin’s lymphoma (NHL). Quality of life, as measured by the Functional Assessment of Cancer Therapy-General survey, was also improved significantly (from baseline to week 12; p = 0.001) in recipients of ibritumomab tiuxetan but not in rituximab recipients.
▴ In a noncomparative trial in patients with follicular NHL refractory to rituximab, the ibritumomab tiuxetan therapeutic regimen produced overall and complete response rates of 74 and 15%, respectively.The Kaplan-Meier median estimates of the time to progression and duration of response were 6.8 and 6.4 months, respectively.
▴ The dose-limiting toxicity of ibritumomab tiuxetan is reversible myelosuppression which was seen in most patients. Most non-hematological toxicity was mild or moderate.
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Carswell, C.I., Wiseman, L.R. 90Y Ibritumomab Tiuxetan. Am J Cancer 1, 341–348 (2002). https://doi.org/10.2165/00024669-200201050-00004
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DOI: https://doi.org/10.2165/00024669-200201050-00004