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Bosutinib for pretreated patients with chronic phase chronic myeloid leukemia: primary results of the phase 4 BYOND study

  • on behalf of the BYOND Study Investigators
  • Jena University Hospital
  • University of Milano-Bicocca
  • Washington University School of Medicine in St. Louis
  • Haukeland University Hospital
  • University Hospital Aachen
  • Johns Hopkins Oncology Center
  • Miguel Servet University Hospital
  • University Hospital Uppsala
  • Central Institute of Mental Health, Medical Faculty Mannheim, University Heidelberg
  • Pfizer Inc.
  • Pfizer SLU
  • University of Bologna
  • Sylvester Comprehensive Cancer Center
  • Developmental Therapeutics LLC
  • Sant'Eugenio Hospital
  • Indiana Blood and Marrow Transplantation
  • SOD Ematologia
  • Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS)
  • Institut Paoli Calmettes
  • University Hospital of Catania
  • Bergonié Institute
  • Hospital Universitario Ramón y Cajal
  • Institut Lorrain du Coeur et des Vaisseaux University Hospital Nancy – Brabois
  • Trondheim University Hospital
  • Centre Hospitalier Universitaire de Nice
  • University of Southern California
  • Charité – Universitätsmedizin Berlin
  • Pozuelo de Alarcon
  • Seattle Cancer Care Alliance
  • Hospital Universitari Vall d'Hebron
  • Ordensklinikum Linz Gmbh Barmherzige Schwestern
  • Niguarda ca' Granda Hospital
  • San Luigi Gonzaga SCDU
  • Institut Universitaire du Cancer Toulouse
  • New York-Presbyterian Hospital/Weill-Cornell Medical Center
  • Hopital Andre Mignot
  • Hospital Universitario de Salamanca
  • Hospital Universitario Y Politécnico La Fe
  • University Medical Center Hamburg-Eppendorf
  • University Hospital Cologne
  • Medical University Innsbruck
  • Azienda Ospedaliero-Universitaria Consorziale Policlinico di Bari
  • Hospital de la Princesa
  • Hematologiskt Centrum

Research output: Contribution to a Journal (Peer & Non Peer)Articlepeer-review

74 Citations (Scopus)

Abstract

Bosutinib is approved for newly diagnosed Philadelphia chromosome-positive (Ph+) chronic phase (CP) chronic myeloid leukemia (CML) and for Ph+ CP, accelerated (AP), or blast (BP) phase CML after prior treatment with tyrosine kinase inhibitors (TKIs). In the ongoing phase 4 BYOND study (NCT02228382), 163 CML patients resistant/intolerant to prior TKIs (n = 156 Ph+ CP CML, n = 4 Ph+ AP CML, n = 3 Ph-negative/BCR-ABL1+ CML) received bosutinib 500 mg once daily (starting dose). As of ≥1 year after last enrolled patient (median treatment duration 23.7 months), 56.4% of Ph+ CP CML patients remained on bosutinib. Primary endpoint of cumulative confirmed major cytogenetic response (MCyR) rate by 1 year was 75.8% in Ph+ CP CML patients after one or two prior TKIs and 62.2% after three prior TKIs. Cumulative complete cytogenetic response (CCyR) and major molecular response (MMR) rates by 1 year were 80.6% and 70.5%, respectively, in Ph+ CP CML patients overall. No patient progressed to AP/BP on treatment. Across all patients, the most common treatment-emergent adverse events were diarrhea (87.7%), nausea (39.9%), and vomiting (32.5%). The majority of patients had confirmed MCyR by 1 year and MMR by 1 year, further supporting bosutinib use for Ph+ CP CML patients resistant/intolerant to prior TKIs.

Original languageEnglish
Pages (from-to)2125-2137
Number of pages13
JournalLeukemia
Volume34
Issue number8
DOIs
Publication statusPublished - 1 Aug 2020
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

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