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  • Title: Mito-flag as salvage therapy for relapsed and refractory acute myeloid leukemia.
    Author: Hänel M, Friedrichsen K, Hänel A, Herbst R, Morgner A, Neser S, Nicklisch M, Teich M, Ehninger G, Fiedler F.
    Journal: Onkologie; 2001 Aug; 24(4):356-60. PubMed ID: 11574763.
    Abstract:
    BACKGROUND: This study was performed to examine the feasibility and toxicity of the combination of mitoxantrone, fludarabine, cytarabine as bolus (B) or continuous infusion (CI) and granulocyte- colony stimulating factor (G-CSF) in patients with recurrent and refractory acute myeloid leukemia (AML). PATIENTS AND METHODS: 29 patients with relapsed (n =17) or refractory (n =12) AML were treated with the Mito-FLAG protocol consisting of mitoxantrone (7 mg/m(2), days 1/3/5), fludarabine (15mg/m(2), every 12 h, days 1-5), cytarabine (Ara-C) as bolus infusion (1000 mg/m(2) over 1 h, every 12 h, days 1-5) (n =15) or as continuous infusion (100-150 mg/m(2) over 24 h, days 1-5) (n =14), and G-CSF (5 mgr;g/ kg/day, day 0 until a neutrophile count of 0.5 x10(9)/l). RESULTS: 17 patients (59%) and 1 patient (3%) achieved complete remission (CR) and partial remission (PR), respectively; thus the overall response rate was 62%. Following Mito-FLAG, 5 patients with CR underwent high-dose therapy (HDT) with allogeneic (n = 2) or autologous (n = 3) stem cell transplantation (SCT). With a median follow-up of 28 (range 6-54) months, 4 transplanted patients are alive in CR (n = 2) or in relapse (n = 2). The median duration of event-free survival (EFS) and overall survival (OS) was 3.2 and 6.8 months, and probabilities of EFS and OS after 1 year were 14 and 34%, respectively. The 1-year rates for EFS and OS in this group were 18 and 53%, respectively. Median duration of WHO grade 4 granulocytopenia and thrombocytopenia was 20 and 23 days, respectively. Nonhematological side effects were moderate, predominantly reaching WHO grades 1-2. Neutropenic fever was seen in 85% of courses, with a median duration of 4 (1-38) days. Four patients (14%) suffered an early death because of aplasia (n = 2), pneumonia (n =1) or progressive AML (1 nonresponding patient). CONCLUSIONS: Our data suggest that the Mito-FLAG protocol is feasible and can be safely performed with both schedules of Ara-C. In this study the regimens have shown high efficacy and acceptable toxicity in patients with relapsed or refractory AML. We currently examine the importance of bolus versus continuous infusion of Ara-C as part of the Mito-FLAG regimen in a prospective randomized multicenter trial.
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