Comparison of Subcutaneous Versus Intravenous Administration of Rituximab As Maintenance Treatment for Follicular Lymphoma: Results From a Two-Stage, Phase IB Study
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Citações na Scopus
75
Tipo de produção
article
Data de publicação
2014
Título da Revista
ISSN da Revista
Título do Volume
Editora
AMER SOC CLINICAL ONCOLOGY
Autores
SALAR, Antonio
AVIVI, Irit
BITTNER, Beate
BOUABDALLAH, Reda
BREWSTER, Mike
CATALANI, Olivier
FOLLOWS, George
HAYNES, Andrew
HOURCADE-POTELLERET, Florence
JANIKOVA, Andrea
Citação
JOURNAL OF CLINICAL ONCOLOGY, v.32, n.17, p.1782-U62, 2014
Resumo
Purpose This two-stage phase IB study investigated the pharmacokinetics and safety of subcutaneous (SC) versus intravenous (IV) administration of rituximab as maintenance therapy in follicular lymphoma. Patients and Methods In stage 1 (dose finding), 124 patients who responded to rituximab induction were randomly assigned to SC rituximab (375 mg/m(2), 625 mg/m(2), or an additional group at 800 mg/m(2)) or IV rituximab (375 mg/m(2)). The objective was to determine an SC dose that would yield a rituximab serum trough concentration (C-trough) in the same range as that of IV rituximab. In stage 2, 154 additional patients were randomly assigned (1: 1) to SC rituximab (1,400 mg) or IV rituximab (375 mg/m(2)) given at 2-or 3-month intervals. The objective was to demonstrate noninferior rituximab C-trough of SC rituximab relative to IV rituximab 375 mg/m(2). Results Stage 1 data predicted that a fixed dose of 1,400 mg SC rituximab would result in a serum C-trough in the range of that of IV rituximab. Noninferiority (ie, meeting the prespecified 90% CI lower limit of 0.8) was then confirmed in stage 2, with geometric mean C-trough (SC): C-trough (IV) ratios for the 2-and 3-month regimens of 1.24 (90% CI, 1.02 to 1.51) and 1.12 (90% CI, 0.86 to 1.45), respectively. Overall safety profiles were similar between formulations (in stage 2, 79% of patients experienced one or more adverse events in each group). Local administration-related reactions (mainly mild to moderate) occurred more frequently after SC administration. Conclusion The fixed dose of 1,400 mg SC rituximab predicted by using stage 1 results was confirmed to have noninferior C-trough levels relative to IV rituximab 375 mg/m(2) dosing during maintenance, with a comparable safety profile. Additional investigation will be required to determine whether the SC route of administration for rituximab provides equivalent efficacy compared with that of IV administration. (C) 2014 by American Society of Clinical Oncology
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