Amgen announced the initiation of the ARROW trial, a global Phase 3 study evaluating the benefit of Kyprolis®(carfilzomib) for Injection administered once-weekly with dexamethasone versus the current U.S. Food and Drug Administration (FDA) approved twice-weekly administration schedule in patients with relapsed and refractory multiple myeloma who have received prior treatment with bortezomib and an immunomodulatory agent (IMiD). The trial was initiated based on results from the Phase 1/2 CHAMPION study, which were presented (abstract no. 8527) at the 51stAnnual Meeting of the American Society of Clinical Oncology (ASCO) on Sunday, May 31 at 8:00 a.m. CT.
Results from the Phase 1 and 2 portions of CHAMPION were presented for 104 patients (Phase 1, n=15; Phase 2, n=89) with relapsed or refractory multiple myeloma who had received one to three prior treatment regimens at the determined maximum tolerated dose (MTD) of 20/70 mg/m2. In the Phase 2 portion of the study, the overall response rate (ORR; defined as the percentage of patients achieving a partial response or better) was 77 percent. The clinical benefit rate (CBR; defined as the percentage of patients with minimal response or better) was 84 percent; the median time to response for patients who achieved a partial response or better was 1.6 months (range, 0.7-7.2); Kaplan-Meier median duration of response (DOR) was 15 months (95 percent CI 9-not estimable); and the Kaplan-Meier median progression-free survival (PFS) was 10.6 months (95 percent CI 9.0-16.1).
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