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Phase I dose escalation trial of the novel proteasome inhibitor carfilzomib in patients with relapsed chronic lymphocytic leukemia and small lymphocytic lymphoma.


ABSTRACT: The proteasome complex degrades proteins involved in a variety of cellular processes and is a powerful therapeutic target in several malignancies. Carfilzomib is a potent proteasome inhibitor which induces rapid chronic lymphocytic leukemia (CLL) cell apoptosis in vitro. We conducted a phase I dose-escalation trial to determine the safety and tolerability of carfilzomib in relapsed/refractory CLL or small lymphocytic lymphoma (SLL). Nineteen patients were treated with carfilzomib initially at 20 mg/m(2), then escalated in four cohorts (27, 36, 45 and 56 mg/m(2)) on days 1, 2, 8, 9, 15 and 16 of 28-day cycles. Therapy was generally well tolerated, and no dose limiting toxicities were observed. The most common hematologic toxicities were thrombocytopenia and neutropenia. All patients evaluable for response had stable disease, including patients with del17p13 and fludarabine-resistant disease. This trial shows acceptable tolerability and limited preliminary efficacy of carfilzomib in CLL and SLL.

SUBMITTER: Awan FT 

PROVIDER: S-EPMC4835239 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature

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Phase I dose escalation trial of the novel proteasome inhibitor carfilzomib in patients with relapsed chronic lymphocytic leukemia and small lymphocytic lymphoma.

Awan Farrukh T FT   Flynn Joseph M JM   Jones Jeffrey A JA   Andritsos Leslie A LA   Maddocks Kami J KJ   Sass Ellen J EJ   Lucas Margaret S MS   Chase Weihong W   Waymer Sharon S   Ling Yonghua Y   Jiang Yao Y   Phelps Mitch A MA   Byrd John C JC   Lucas David M DM   Woyach Jennifer A JA  

Leukemia & lymphoma 20150311 10


The proteasome complex degrades proteins involved in a variety of cellular processes and is a powerful therapeutic target in several malignancies. Carfilzomib is a potent proteasome inhibitor which induces rapid chronic lymphocytic leukemia (CLL) cell apoptosis in vitro. We conducted a phase I dose-escalation trial to determine the safety and tolerability of carfilzomib in relapsed/refractory CLL or small lymphocytic lymphoma (SLL). Nineteen patients were treated with carfilzomib initially at 20  ...[more]

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