• Eur. J. Cancer · Sep 2006

    Multicenter Study

    Phase 1 European Organisation for Research and Treatment of Cancer study determining safety of pegylated liposomal doxorubicin (Caelyx) in combination with ifosfamide in previously untreated adult patients with advanced or metastatic soft tissue sarcomas.

    • O S Nielsen, P Reichardt, T B Christensen, D Pink, S Daugaard, C Hermans, S Marreaud, M van Glabbeke, J Blay, and I Judson.
    • Aarhus University Hospital, Department of Oncology, Nörrebrogade 44, DK-8000 Aarhus C, Denmark. osnie@as.aaa.dk
    • Eur. J. Cancer. 2006 Sep 1; 42 (14): 2303-9.

    AbstractThis phase I study evaluated the toxicity of first-line combined pegylated liposomal doxorubicin (Caelyx) and ifosfamide in patients with advanced and/or metastatic soft tissue sarcomas. Five dose levels (L) were studied: Caelyx 30 mg/m2 (L1-4) or 40 mg/m2 (L5) 1-h infusion d 1 q 3 weeks + ifosfamide and mesna at X g/m2/4 h d 1-3 q 3 weeks at five doses: L1: X = 1.7 g; L2: X = 2 g; L3: X = 2.5 g; L4 and L5: X = 3 g. Cohorts of 3 patients were entered at each level unless a dose-limiting toxicity (DLT) occurred. In case of DLT in 1 of 3 patients a new cohort was added. Toxicity was evaluated by Common Toxicity Criteria (CTC). A total of 28 patients was included: 4 at dose L1, 8 at L2, 3 at L3, 6 at L4, and 7 at L5. Median age was 60 years (range 29-69 years). Male/female ratio was 12/16. Seventy-five percent of patients had a performance status of 1.0 and 36% had leiomyosarcomas. No DLT was observed at dose L1-4. Six patients developed a DLT at dose L5, and thus the recommended dose is level 4 (i.e. Caelyx 30 mg/m2/1 h d 1+ifosfamide at 3 g/m2/4 h d 1-3 q 3 weeks). Few haematological and biochemical events were observed and the principal toxicities were granulocytopaenia and leucopaenia. Five patients discontinued therapy because of toxicity, 4 of them at dose level 5. Non-haematological toxicities > grade 2 were also few. Palmar-plantar erythrodysesthesia (PPE) > grade 1 was not seen. Two patients obtained partial response (PR) and 13 stable disease (SD). Median overall survival (OS) was 333 d and median progression-free survival (PFS) 174 d. In conclusion, this seems to be a feasible combination in patients with advanced soft tissue sarcomas, allowing ifosfamide to be given in a dosage similar to that used when given alone. The recommended dose for future studies is Caelyx 30 mg/m2/1 h d 1+ifosfamide 3 g/m2/4 h d 1-3 q 3 weeks.

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