期刊
BLOOD
卷 113, 期 19, 页码 4497-4504出版社
AMER SOC HEMATOLOGY
DOI: 10.1182/blood-2008-12-191254
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- Italian Association Against Leukemia- Lymphoma and Myeloma (BolognAIL)
- Fondazione del Monte di Bologna e Ravenna
- Italian Ministry of Education [20050 63732_003, 2007F7 AE7B_002]
- University of Bologna
- European Union
Imatinib mesylate (IM), 400 mg daily, is the standard treatment of Philadelphia-positive (Ph+) chronic myeloid leukemia (CML). Preclinical data and results of single-arm studies raised the suggestion that better results could be achieved with a higher dose. To investigate whether the systematic use of a higher dose of IM could lead to better results, 216 patients with Ph+ CML at high risk (HR) according to the Sokal index were randomly assigned to receive IM 800 mg or 400 mg daily, as front-line therapy, for at least 1 year. The CCgR rate at 1 year was 64% and 58% for the high-dose arm and for the standard-dose arm, respectively (P = .435). No differences were detectable in the CgR at 3 and 6 months, in the molecular response rate at any time, as well as in the rate of other events. Twenty-four (94%) of 25 patients who could tolerate the full 800-mg dose achieved a CCgR, and only 4 (23%) of 17 patients who could tolerate less than 350 mg achieved a CCgR. This study does not support the extensive use of high-dose IM (800 mg daily) front-line in all CML HR patients. This trial was registered at www.clinicaltrials.gov as #NCT00514488. (Blood. 2009;113:4497-4504)
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