Nilotinib is effective in patients with chronic myeloid leukemia in chronic phase after imatinib resistance or intolerance: 24-month follow-up results.

Publication Type:

Journal Article

Source:

Blood, Volume 117, Issue 4, p.1141-5 (2011)

Keywords:

2011, Adult, Aged, Aged, 80 and over, Antineoplastic Agents, Clinical Research Division, Drug Resistance, Neoplasm, Drug Tolerance, Follow-Up Studies, Humans, Leukemia, Myeloid, Chronic-Phase, Middle Aged, Piperazines, Pyrimidines, Time Factors, Treatment Outcome, Young Adult

Abstract:

Nilotinib is a potent selective inhibitor of the BCR-ABL tyrosine kinase approved for use in patients with newly diagnosed chronic myeloid leukemia in chronic phase (CML-CP), and in CML-CP and CML-accelerated phase after imatinib failure. Nilotinib (400 mg twice daily) was approved on the basis of the initial results of this phase 2 open-label study. The primary study endpoint was the proportion of patients achieving major cytogenetic response (CyR). All patients were followed for ≥ 24 months or discontinued early. Of 321 patients, 124 (39%) continue on nilotinib treatment. Overall, 59% of patients achieved major CyR; this was complete CyR (CCyR) in 44%. Of patients achieving CCyR, 56% achieved major molecular response. CyRs were durable, with 84% of patients who achieved CCyR maintaining response at 24 months. The overall survival at 24 months was 87%. Adverse events were mostly mild to moderate, generally transient, and easily managed. This study indicates that nilotinib is effective, with a manageable safety profile, and can provide favorable long-term benefits for patients with CML-CP after imatinib failure.