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Efficacy and safety of clofarabine in relapsed and/or refractory non-Hodgkin lymphoma, including rituximab-refractory patients.

Abstract：

BACKGROUND:Currently, no standard therapy exists for patients with relapsed and/or refractory non-Hodgkin lymphoma (NHL) who are ineligible for transplantation or who have failed after bone marrow transplantation. The authors of this report investigated the safety and efficacy of clofarabine (CLO) in these patients. METHODS:In a 2-step, open-label study, CLO (as a 1-hour intravenous infusion given daily for 5 days) was given every 28 days (maximum, 6 cycles). In the phase 1 portion (n = 7; standard 3 + 3 study design), the dose was escalated by 2 mg/m(2) to determine the maximum tolerated dose (MTD). The phase 2 study (n = 26) was initiated at the MTD, and patients were followed until disease progression. RESULTS:Of 33 patients who were enrolled, 31 patients (median age, 69 years) were evaluable; 24% failed after previous stem cell transplantation, and 72% were rituximab-refractory. The MTD for CLO was 4 mg/m(2) . The overall response rate was 42%. Seven patients (23%) achieved a complete response, and 6 patients (19%) achieved a partial response. The median response duration was 5 months. Among the rituximab-refractory patients, the overall response rate was 47% (complete response rate, 28%), and the median response duration was 7 months. At a median follow-up of 14 months, 45% of patients remained alive (median overall survival, 10 months). Toxicity was mainly hematologic (≥60% of patients had neutropenia or thrombocytopenia). Nonhematologic toxicity included tumor lysis syndrome, infection, and renal insufficiency (in 6% of patients each). No treatment-related mortality was observed. CONCLUSIONS:Single-agent CLO was active and was tolerated well in patients with refractory NHL, including patients in a rituximab-refractory subset. Reversible myelosuppression was the major toxicity. Study is registered at www.clinicaltrials.gov (NCT00156013).

journal_name

Cancer

journal_title

Cancer

authors

Nabhan C,Davis N,Bitran JD,Galvez A,Fried W,Tolzien K,Foss S,Dewey WM,Venugopal P

doi

10.1002/cncr.25603

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

1490-7

issue

eissn

0008-543X

issn

1097-0142

journal_volume

117

pub_type

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Efficacy and safety of clofarabine in relapsed and/or refractory non-Hodgkin lymphoma, including rituximab-refractory patients.