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


Baccarani M., Rosti G., Castagnetti F., Haznedaroglu I., Porkka K., Abruzzese E., ...Daha Fazla

BLOOD, cilt.113, ss.4497-4504, 2009 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 113 Konu: 19
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1182/blood-2008-12-191254
  • Dergi Adı: BLOOD
  • Sayfa Sayıları: ss.4497-4504

Özet

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)