Abstract
Dasatinib is an inhibitor of BCR-ABL and SRC-family kinases for patients with imatinib-resistant or -intolerant chronic myelogenous leukemia (CML). In this international phase II trial, dasatinib was administered orally (70 mg twice daily) to patients with myeloid blast phase (MBP, n=109) or lymphoid blast phase (LBP, n=48) CML. After a minimum follow-up of 12 months (range 0.03–20.7 months), major hematologic responses were induced in 34% (MBP-CML) and 35% (LBP-CML) of patients. Major cytogenetic responses were attained in 33% (MBP-CML) and 52% (LBP-CML) of patients and complete cytogenetic responses were attained in 26 and 46%, respectively. Median progression-free survival was 6.7 (MBP-CML) and 3.0 (LBP-CML) months. Median overall survival was 11.8 (MBP-CML) and 5.3 (LBP-CML) months. Overall, dasatinib had acceptable tolerability. Fluid retention events were more frequent in the MBP-CML than the LBP-CML cohort: pleural effusion occurred in 36 and 13% (all grades) and 15 and 6% (grades 3/4), respectively. Other non-hematologic side effects were primarily grade 1/2; grade 3/4 events were recorded in ⩽6% of patients, except febrile neutropenia (15%). Cytopenias were noted in the majority of patients, and were manageable with dose interruptions/reductions. Dasatinib is associated with a promising rate of response in this high-risk population.
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Acknowledgements
We acknowledge the key contributions made by the remaining primary investigators of this trial: JJ Garcia (Argentina); T Hughes, B Van Leeuwen (Australia); P Valent (Austria); G Verhoef (Belgium); CA De Souza, PE Dorlhiac-Llacer (Brazil); P Laneuville (Canada); K Porkka (Finland); G Marit, J Reiffers, F Maloisel, J-L Harrousseau (France); MC Müller (molecular analyses), T Fischer (Germany); A Nagler (Israel); F Ferrara (Italy); J-H Lee (South Korea); W Schroyens (The Netherlands); P Caguioa (Philippines); B Simonsson, M Ekblom (Sweden); A Gratwohl (Switzerland); P-M Chen (Taiwan); S Jootar (Thailand); T Holyoake (UK); A Rapoport, R Larson, C Schiffer, R Stone, A Greco, S Goldberg, K Bhalla, S Petersdorf, P Emanuel (USA). This study was supported by research funding from Bristol-Myers Squibb. Professional writing and editorial assistance, funded by Bristol-Myers Squibb, was provided by Gardiner-Caldwell US.
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Data contained within this article were presented at the American Society of Hematology Annual Meeting in Orlando, FL, 9–12 December 2006.
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Cortes, J., Kim, DW., Raffoux, E. et al. Efficacy and safety of dasatinib in imatinib-resistant or -intolerant patients with chronic myeloid leukemia in blast phase. Leukemia 22, 2176–2183 (2008). https://doi.org/10.1038/leu.2008.221
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DOI: https://doi.org/10.1038/leu.2008.221
Keywords
- dasatinib
- chronic myeloid leukemia
- blast phase
- BCR-ABL
- SRC
- imatinib resistance
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