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Comparison of imatinib 400 mg and 800 mg daily in the front-line treatment of high-risk, Philadelphia-positive chronic myeloid leukemia: a European LeukemiaNet Study
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2009 (English)In: Blood, ISSN 0006-4971, E-ISSN 1528-0020, Vol. 113, no 19, 4497-4504 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2009. Vol. 113, no 19, 4497-4504 p.
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Medical and Health Sciences
URN: urn:nbn:se:uu:diva-124604DOI: 10.1182/blood-2008-12-191254ISI: 000265910300010PubMedID: 19264678OAI: oai:DiVA.org:uu-124604DiVA: diva2:317740
Available from: 2010-05-05 Created: 2010-05-05 Last updated: 2010-07-21Bibliographically approved

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