Initial cytoreduction by mitoxantrone and cytarabine has no impact on the outcome of interferon-alfa-2b therapy in chronic myelogenous leukemia.
Eleven previously untreated patients with chronic-phase Philadelphia-chromosome-positive chronic myelogenous leukemia were treated with cytotoxic chemotherapy followed by interferon-alfa-2b (IFN-alpha) maintenance. Initial chemotherapy consisted of three cycles of mitoxantrone 10 mg/m2 on day 1 and 2, and cytarabine 100 mg/m2 daily for 5 d. Complete hematological response was obtained in 9 (82%) patients with moderately associated toxicity. However, cytogenetic responses after three cycles were poor and transient (1 partial suppression and 2 minor suppression of Ph chromosome). Maintenance therapy with IFN-alpha was started in 10 patients at 5 x 10(6) U/m2 daily with dose reduction if hematologic toxicity or severe side-effects occurred. Of 9 evaluable patients treated for more than 3 months, 6 patients maintained a complete hematological response, whereas 1 patient remained in partial remission and 2 patients showed progressive disease. Cytogenetic evaluation showed partial suppression of Ph chromosome in 1 patient, whereas 1 patient had a minor response and 5 patients had no change or evolution of new chromosome abnormalities. As the results are not superior to IFN-alpha treatment alone, it is concluded that initial cytoreduction by mitoxantrone and cytarabine has no impact on the outcome of therapy in CML.
Nielsen
H
H
Department of Internal Medicine, University Hospital of Hvidovre, Denmark.
Nielsen
J L
JL
Karle
H
H
D000328:Adult; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects / Q000627:therapeutic use*; D003561:Cytarabine / Q000008:administration & dosage; D006801:Humans; D000077190:Interferon alpha-2; D016898:Interferon-alpha / Q000627:therapeutic use*; D015466:Leukemia, Myeloid, Chronic-Phase / Q000188:drug therapy*; D008137:Longitudinal Studies; D008875:Middle Aged; D008942:Mitoxantrone / Q000008:administration & dosage; D010677:Philadelphia Chromosome; D010865:Pilot Projects; D011994:Recombinant Proteins; D012074:Remission Induction
D000077190:Interferon alpha-2; D016898:Interferon-alpha; D011994:Recombinant Proteins; D003561:Cytarabine; D008942:Mitoxantrone