Amgen (AMGN) Announces Publication of Positive BLINCYTO Phase 1/2 Single-Arm Trial in ALL; Says 39% Achieved Complete Remission
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Amgen (Nasdaq: AMGN) announced that the Journal of Clinical Oncology (JCO) published results from the Phase 1/2 '205 single-arm trial evaluating BLINCYTO (blinatumomab) in pediatric patients with Philadelphia chromosome‑negative (Ph-) relapsed or refractory B-cell precursor acute lymphoblastic leukemia (ALL). Based on data from an exploratory pooled analysis of 70 patients who received the recommended dose of BLINCYTO in the Phase 1 or Phase 2 portions of the study, 27 patients (39 percent, 95 percent confidence interval [CI], 27–51 percent) achieved complete remission within the first two cycles.
The most frequent grade ≥3 adverse events (AEs) among the patients who received the recommended dose were anemia (36 percent), thrombocytopenia (21 percent), febrile neutropenia (17 percent), hypokalemia (17 percent) and neutropenia (17 percent). The most common AEs overall were pyrexia (80 percent), anemia (41 percent), nausea (33 percent) and headache (30 percent).
"This study showed that BLINCYTO can induce deep molecular remissions in children with highly refractory, multiply relapsed ALL," said senior author Lia Gore, M.D., professor of Pediatrics, Medical Oncology and Hematology, University of Colorado Anschutz Medical Campus.
"Pediatric patients with relapsed or refractory Ph- B-cell precursor ALL are in critical need of new treatment options," said Sean E. Harper, M.D., executive vice president of Research and Development at Amgen. "The publication of this data in the Journal of Clinical Oncology provides clinical evidence of the potential of BLINCYTO in this patient population and underscores the significance of the recent regulatory approval for use of BLINCYTO in these patients."
Among patients who achieved complete remission within the first two cycles of treatment, 52 percent had a complete minimal residual disease (MRD) response, a measure of eradication of residual disease at the molecular level. Complete MRD response was an exploratory endpoint in both phases of the study.
Data from the '205 study were the basis of a supplemental Biologics License Application (sBLA) for BLINCYTO to include new data supporting the treatment of pediatric patients with Ph- relapsed or refractory B-cell precursor ALL. On Aug. 30, 2016, the U.S. Food and Drug Administration (FDA) approved the sBLA for BLINCYTO to include this new data supporting the treatment of pediatric patients with Ph- relapsed or refractory B-cell precursor ALL. This indication is approved under accelerated approval, and continued approval may be contingent upon verification of clinical benefit in subsequent trials.
ALL is a rapidly progressing cancer of the blood and bone marrow. Although very rare in adults, it is the most common type of cancer in children.1,2 Of the children diagnosed with ALL in the U.S. each year, approximately 15-20 percent (375-500) will experience relapse.3-5 Prognosis for children with ALL who are refractory or experience a relapse is extremely poor, and post-relapse survival is only achieved in 40-50 percent of patients.6-8
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