A dose escalation feasibility study of lenalidomide for treatment of symptomatic, relapsed chronic lymphocytic leukemia.

Maddocks K, Ruppert AS, Browning R, Jones J, Flynn J, Kefauver C, Gao Y, Jiang Y, Rozewski DM, Poi M, Phelps MA, Harper E, Johnson AJ, Byrd JC, Andritsos LA
Leuk Res 38 1025-9 09/01/2014

Abstract

Adequate dosing of lenalidomide in Chronic Lymphocytic Leukemia (CLL) remains unclear. This study determined maximum tolerated dose (MTD) in relapsed CLL patients (Cohort A) and patients achieving a partial response (PR) or better to recent therapy (Cohort B). Thirty-seven patients were enrolled. MTD was 2.5mg followed by 5.0mg continuous. In Cohort A, tumor flare grade 1-2 occurred in 15 patients (50%) and grade 3 in 1 patient (3%). Cohort A had 19 of 23 evaluable (83%) patients, 4 PR (17%) and 15 (65%) stable disease (SD), Cohort B had 6 of 7 patients (86%) with SD. Despite overall response rate not being high, many patients remained on therapy several months with SD.

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