Chronic Phase Chronic Myeloid Leukemia Clinical Trial
Official title:
A PHASE I/II, MULTI-CENTRE, TRIAL OF RUXOLITINIB THERAPY IN COMBINATION WITH NILOTINIB IN PATIENTS WITH PHILADELPHIA POSITIVE CHRONIC MYELOID LEUKEMIA OR ACUTE LYMPHOBLASTIC LEUKEMIA WHO HAVE FAILED TYROSINE KINASE INHIBITOR THERAPY
This is the study to test combination regimen of Nilotinib and Ruxolitinib therapy for the treatment of patients with Philadelphia positive chronic myeloid leukemia (CML) or acute lymphoblastic leukemia (ALL) who is resistant to multiple tyrosine kinase inhibitor therapies with BCR-ABL kinase inhibition activity. Ruxolitinib is a tyrosine kinase inhibitor blocking alternative pathway independent of BCR-ABL mediated pathway, thus having a potential to overcome tyrosine kinase inhibitor resistance in Philadelphia positive CML or ALL patients. Phase I study will be conducted to define a recommended phase II dose (RPTD) and phase II study will examine the hypothesis that combinational approach will increase response rate of resistant CML/ALL patients, thus evaluating efficacy of the combination regimen.
The purpose of this study is to find out if multiple tyrosine kinase inhibitor resistant chronic myeloid leukemia (CML) or acute lymphoblastic leukemia (ALL) can be treated with combination approach of Nilotinib with Ruxolitinib which may block alternative pathway besides BCR-ABL kinase inhibition in Ph positive leukemia, esp against JAK2-STAT5 pathway. First step is to define the dose of Ruxolitinib with fixed dose of Nilotinib which had been approved at the dose of 400mg bid for imatinib failed CML. During phase I part of the study,dose escalations will be decided on the basis of DLTs observed hence the exact sample size could not be predicted with certainty but will range between 9-12 patients. Three patients will be enrolled per dose level. Accordingly 9 patients are expected to be enrolled. If a DLT is observed, 3 more patients will be enrolled at the dose level in which the DLT occurred. The study will be conducted at multiple sites across Canada and enrollment will be competitive. Once 3 patients are enrolled in a cohort, that dose level will be closed to enrollment until safety assessment of the 3 subjects is performed at the end of cycle 1. This procedure will be performed for each dosing cohort. Patients will be assigned to a dose level based on authorization from the sponsor in collaboration with Ozmosis Research Inc. For the phase II part of the study, once the RPTD has been established in the phase I portion of this trial, the phase II will begin. The phase II portion will be a two-stage, single arm, unblinded study investigating the potential efficacy of the combination of Ruxolitinib and Nilotinib. A maximum of 20 patients will be accrued in the phase II portion. Those patients treated in the phase I portion of this trial at the RPTD will be included in the analysis of the Phase II study. ;
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