Bosutinib versus imatinib for newly diagnosed chronic myeloid leukemia: Results from the randomized BFORE trial Journal Article


Authors: Cortes, J. E.; Gambacorti-Passerini, C.; Deininger, M. W.; Mauro, M. J.; Chuah, C.; Kim, D. W.; Dyagil, I.; Glushko, N.; Milojkovic, D.; le Coutre, P.; Garcia-Gutierrez, V.; Reilly, L.; Jeynes-Ellis, A.; Leip, E.; Bardy-Bouxin, N.; Hochhaus, A.; Brümmendorf, T. H.
Article Title: Bosutinib versus imatinib for newly diagnosed chronic myeloid leukemia: Results from the randomized BFORE trial
Abstract: Purpose Bosutinib is a potent dual SRC/ABL kinase inhibitor approved for adults with Philadelphia chromosome–positive chronic myeloid leukemia (CML) resistant and /or intolerant to prior therapy. We assessed the efficacy and safety of bosutinib versus imatinib for first-line treatment of chronic-phase CML. Methods In this ongoing, multinational, phase III study, 536 patients with newly diagnosed chronic-phase CML were randomly assigned 1:1 to receive 400 mg of bosutinib once daily (n = 268) or imatinib (n = 268). Per protocol, efficacy was assessed in patients who were Philadelphia chromosome–positive with typical (e13a2/e14a2) transcripts (bosutinib, n = 246; imatinib, n = 241). Patients with Philadelphia chromosome–negative–/BCR-ABL1–positive status and those with unknown Philadelphia chromosome status and/or atypical BCR-ABL1 transcript type were excluded from this population. Results The major molecular response (MMR) rate at 12 months (primary end point) was significantly higher with bosutinib versus imatinib (47.2% v 36.9%, respectively; P = .02), as was complete cytogenetic response (CCyR) rate by 12 months (77.2% v 66.4%, respectively; P = .0075). Cumulative incidence was favorable with bosutinib (MMR: hazard ratio, 1.34; P = .0173; CCyR: hazard ratio, 1.38; P, .001), with earlier response times. Four patients (1.6%) receiving bosutinib and six patients (2.5%) receiving imatinib experienced disease progression to accelerated/blast phase. Among treated patients, 22.0% of patients receiving bosutinib and 26.8% of patients receiving imatinib discontinued treatment, most commonly for drug-related toxicity (12.7% and 8.7%, respectively). Grade $ 3 diarrhea (7.8% v 0.8%) and increased ALT (19.0% v 1.5%) and AST (9.7% v 1.9%) levels were more common with bosutinib. Cardiac and vascular toxicities were uncommon. Conclusion Patients who received bosutinib had significantly higher rates of MMR and CCyR and achieved responses faster than those who received imatinib. Consistent with the known safety profile, GI events and transaminase elevations were more common with bosutinib. Results indicate bosutinib may be an effective first-line treatment for chronic-phase CML. © 2017 by American Society of Clinical Oncology.
Keywords: adult; cancer survival; controlled study; treatment response; aged; survival rate; major clinical study; fatigue; neutropenia; cancer growth; diarrhea; drug efficacy; drug safety; drug withdrawal; side effect; treatment duration; imatinib; pain; anemia; gastrointestinal symptom; leukopenia; nausea; randomized controlled trial; thrombocytopenia; vomiting; myalgia; incidence; qt prolongation; cytogenetics; calcium; creatinine; hemoglobin; chronic myeloid leukemia; abdominal pain; arthralgia; asthenia; drug dose escalation; fever; rash; alanine aminotransferase; aspartate aminotransferase; cardiovascular disease; multicenter study; peripheral edema; glucose; creatine kinase; headache; phase 3 clinical trial; periorbital edema; muscle spasm; pericardial effusion; phosphate; amylase; cerebrovascular accident; potassium; triacylglycerol lipase; decreased appetite; abnormal laboratory result; bosutinib; human; male; female; priority journal; article
Journal Title: Journal of Clinical Oncology
Volume: 36
Issue: 3
ISSN: 0732-183X
Publisher: American Society of Clinical Oncology  
Date Published: 2018-01-20
Start Page: 231
End Page: 237
Language: English
DOI: 10.1200/jco.2017.74.7162
PROVIDER: scopus
PUBMED: 29091516
DOI/URL:
Notes: Article -- Export Date: 1 February 2018 -- Source: Scopus
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MSK Authors
  1. Michael John Mauro
    120 Mauro