RESUMO
PURPOSE: A phase I/II trial to assess safety and efficacy of the combination bendamustine, rituximab, and lenalidomide (BRL) in patients with chronic lymphocytic leukemia (CLL). PATIENTS AND METHODS: Seventeen relapsed or refractory (R/R) and five previously untreated (FL) CLL patients were enrolled in the trial. In the R/R cohort, four different dose levels of lenalidomide (maximum 15 mg/d) were used. In the FL cohort, lenalidomide was dose escalated from 5 mg/d to 15 mg/d. Bendamustine was used at doses of 50 or 90 mg/m(2) for R/R or FL treatment, respectively. 375 mg/m(2) Rituximab were used for the first and 500 mg/m(2) for subsequent treatment courses. Treatment consisted of up to six courses of 28 d. RESULTS: The maximal tolerable dose of lenalidomide was 5 mg/d. The response rate was 47.1% in R/R and 60% in FL patients. Median progression-free survival was 8.0 months. Median overall survival was 22.9 and 12.3 months, respectively, in R/R and FL patients. Grade 3/4 hematological toxicity was observed in 71.4%, and severe infections in 47.6% of patients. Due to high toxicity and low response rate of BRL, the trial was closed prematurely. CONCLUSION: BRL was associated with a high toxicity rate, a high number of treatment interruptions, and a low remission rate. Therefore, BRL cannot be considered an appropriate treatment option for patients with CLL.
Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Leucemia Linfocítica Crônica de Células B/tratamento farmacológico , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Cloridrato de Bendamustina/administração & dosagem , Aberrações Cromossômicas , Esquema de Medicação , Feminino , Humanos , Lenalidomida , Leucemia Linfocítica Crônica de Células B/diagnóstico , Leucemia Linfocítica Crônica de Células B/mortalidade , Masculino , Dose Máxima Tolerável , Pessoa de Meia-Idade , Mutação , Estadiamento de Neoplasias , Prognóstico , Rituximab/administração & dosagem , Talidomida/administração & dosagem , Talidomida/análogos & derivados , Resultado do TratamentoRESUMO
Observation (watch and wait) is the standard of care for patients with asymptomatic Binet stage A chronic lymphocytic leukemia (CLL). However, the clinical course of these patients is very heterogeneous with some patients requiring treatment rather soon and others not progressing for ages. The clinical staging does not reflect this high variability of the clinical course of CLL. Published data demonstrate that the comprehensive use of several risk factors dramatically improves the accuracy of prognostication independent of clinical stage. The treatment of CLL underwent considerable changes with the introduction of kinase-inhibitors, including ibrutinib, an orally administered, well-tolerated and potent inhibitor of Bruton's tyrosine kinase. This is the first prospective, multicenter, placebo-controlled, double-blind, Phase III study to compare efficacy and safety of ibrutinib to a watch-and-wait approach in Binet stage A CLL with risk of disease progression defined by the comprehensive CLL score.
