An Open-Label Phase 2 Study of Lenalidomide in Combination with Oral Dexamethasone in the Previously Untreated, Symptomatic Patients with Chronic Lymphocytic Leukemia (CLL)

Christine Chen, MD, Harminder Paul, Luisa Del Rizzo, Lisa W Le, MSc, Ellen Nong Wei1, Anthea Lau, James B Johnston, MD, Spencer B Gibson, PhD, Michelle Brown and Suzanne Trudel, MD

Author address: 

Department of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, ON, Canada

Abstract: 

Introduction: Lenalidomide is an immunomodulatory agent with promising anti-tumor activity in CLL. The use of lenalidomide in this disease, however, can be complicated by tumor lysis syndrome (TLS) and frequent tumor flare (TF). From our experience using low-dose lenalidomide (starting dose 2.5mg, titrating to a target of 10mg daily), TLS can be prevented but TF remains frequent (Chen et al. JCO 2010). In addition, when using low-dose single-agent lenalidomide, few complete responses (CR) are achieved. We therefore proposed the combination of lenalidomide and pulse dexamethasone, aiming to enhance anti-tumor activity through both synergy and mitigation of toxicities such as TF, enabling escalation to higher doses of lenalidomide. Our previous observation of "œrebound" peripheral lymphocytosis when using intermittent dosing of lenalidomide led to the current use of continuous daily dosing. We present an interim analysis of the initial 18 of 31 planned pts in this ongoing trial of lenalidomide and dexamethasone as first-line CLL therapy. Methods: Eligible pts were previously untreated with symptomatic CLL (cytopenias, symptomatic adenopathy/organomegaly, constitutional symptoms, lymphocyte doubling count
2012

abstract No: 

2895

Full conference title: 

American Society of Hematology 2012
    • ASH 54th (2012)