Publication Date:
2009-11-20
Description:
Abstract 2763 Poster Board II-739 Introduction: Chronic anemia of myelodysplastic syndromes (MDS) is associated with poor quality of life (QoL) and an inferior clinical course. Transfusion dependence in lower-risk patients is associated with reduced survival as a result of iron overload, heart failure, and progression to acute myeloid leukaemia. Lenalidomide is approved for the treatment of transfusion-dependent anemia in patients with International Prognostic Scoring System (IPSS) Low- or Intermediate (Int)-1-risk MDS with deletion 5q [del(5q)]. Rapid and durable responses include transfusion independence with a rise in Hb, suppression of the del(5q) clone, and improvement in bone marrow morphological features. We present preliminary results of a prospective single-arm trial investigating the effect on QoL, efficacy, and safety of lenalidomide in the treatment of 49 adult patients with IPSS Low- and Int-1-risk MDS with del(5q) with/without additional cytogenetic abnormalities and Hb 〈 10 g/dL. Methods: Exclusion criteria include: ANC 〈 500/mm3; PLT count 〈 50,000/mm3; prior chemotherapy; and ongoing treatment with rHuEpo. Lenalidomide was administered orally at a starting dose of 10 mg/day. If necessary, dosing was reduced to 5 mg/day or 5 mg on alternate days. Treatment will be continued for a maximum of 12 months or until evidence of unacceptable non-hematological adverse events, lack of response, disease progression, or relapse following erythroid improvement. QoL was assessed at study entry and weeks 8, 12, and 24 using the QOL-E v.2 questionnaire. QoL scores are standardized in a 0–100 scale with lower scores representing a worse QoL. Response was evaluated according to the modified International Working Group (IWG) response criteria. Results: Twenty patients (5 M, 15 F, mean age 72 ± 10 years) are evaluable for erythroid responses and cytogenetic changes at 12 weeks and 13 patients have reached a 24-week follow-up. At baseline, mean disease duration was 3.4 ± 2.3 years. Seventeen patients were transfusion dependent (TD), 3 were transfusion free (TF). ECOG performance status was 0 in 14 patients and 1 in 6 patients. After 12 weeks from study entry, 17 (85%) patients obtained an erythroid response with a mean Hb level increase from baseline 8.6 ± 0.9 g/dL to 11.1 ± 2.4 (p=0.001). By 24 weeks, 11 of the 13 patients re-evaluated were erythroid responders obtaining transfusion independence and significant improvements in Hb (mean change from baseline 3.7 ± 2.7 g/dL, and increase to mean 11.1 ± 2.4 g/dL (p
Print ISSN:
0006-4971
Electronic ISSN:
1528-0020
Topics:
Biology
,
Medicine
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