THOUSAND OAKS, Calif., May 16, 2012 /PRNewswire/ --Amgen    (AMGN)    today announced updated results from a Phase 2 study that    showed treatment with blinatumomab (AMG 103) helped achieve a    high-rate of complete response (CR) in 72 percent of adult    patients with relapsed or refractory B-precursor acute    lymphoblastic leukemia (ALL) treated in the study. Blinatumomab    is the first of a new class of agents called bi-specific T cell    engagers (BiTE) antibodies, designed to harness the body's    cell-destroying T cells to kill cancer cells.    Blinatumomab targets cells expressing CD19, a protein    found on the surface of B-cell derived leukemias and lymphomas,    such as ALL. Full results of the study will be presented during    an oral abstract session at the 48th Annual Meeting of the    American Society of Clinical Oncology (ASCO) on June 4    (Abstract Number 6500, 8:00 a.m. - 8:15 a.m. CDT, E354a).  
    In this Phase 2 single-arm dose-ranging trial, 26 of the 36    patients treated with blinatumomab across all of the tested    doses and schedules achieved a CR with partial hematologic    recovery (CRh*). All but two patients achieved a molecular    response, meaning there was no evidence of leukemic cells by    polymerase chain reaction. No treatment related deaths or    serious adverse events (AEs) were reported in the study.  
    At the time of the analysis, median survival was 9.0 (8.2,    15.8) months with a median follow-up period of 10.7 months. In    the group of patients who received the selected dose, median    survival was 8.5 months. The median duration of response in the    26 patients who responded to treatment was 8.9 months.  
    "For these patients with limited treatment options, the    remission rate observed in the trial is a vast improvement over    the current standard of care," said Professor Max Topp,    Department of Internal Medicine II, University of Wuerzburg and    chair of the study. "These results also represent significant    progress in our research of immunotherapies; a new approach to    fighting cancer that we believe could make a real difference    for patients."  
    For patients who received the selected dose and schedule, the    most common adverse events were grade one or two and included    pyrexia (70 percent), headache (39 percent), tremor (30    percent) and fatigue (30 percent). These were most frequently    seen at the onset of treatment in cycle one. Reversible    central nervous system events led to treatment interruptions in    six patients with two patients permanently discontinuing    treatment. Cytokine release syndrome led to treatment    interruption in two patients.  
    In addition to the results from this study, data from studies    of 12 Amgen investigational molecules and marketed products    will be presented at the ASCO Annual Meeting. These include    results from studies of the immunotherapy talimogene    laherparepvec, pipeline molecules such asrilotumumab (AMG    102) and AMG 386, and marketed products. A complete listing of    Amgen abstracts of interest can be found at http://www.amgen.com/media/amgen_asco_2012.html.    Abstracts are available online at http://www.asco.org.  
    Phase 2 Study DesignThis Phase 2 dose-ranging study    evaluated the efficacy, safety and tolerability of blinatumomab    in adult patients with B-precursor ALL who had relapsed    following treatment with standard front-line chemotherapy or    allogeneic stem cell transplant. Patients received blinatumomab    for 28 days followed by two weeks off therapy over a six week    treatment cycle, for up to five treatment cycles. Patients    received a continuous intravenous infusion of blinatumomab at    an initial dose of five or 15 micrograms per meter squared per    day, ranging up to 30 micrograms for the remainder of the    treatment. The primary endpoint of the study was the rate of    CR/CRh*. Secondary endpoints included molecular response rate,    duration of response and overall survival. As of April 13,    2012, all 36 patients were evaluable for efficacy and safety.  
    About BlinatumomabBlinatumomab (AMG 103) is a    bispecific T cell engager (BiTE) antibody designed to direct    the body's cell-destroying T cells against target cells    expressing CD19, a protein found on the surface of B-cell    derived leukemias and lymphomas. The modified antibodies are    designed to engage two different targets simultaneously,    thereby juxtaposing T cells to cancer cells. Blinatumomab is    the first of the BiTE antibodies and Amgen has received orphan    drug designation from the U.S. Food and Drug Administration for    the treatment of ALL, chronic lymphocytic leukemia (CLL), hairy    cell leukemia, prolymphocytic leukemia and indolent B cell    lymphoma and from the European Medicines Agency for the    treatment of indolent B cell lymphoma, ALL, CLL and mantle cell    leukemia (MCL).  
    About ALLAcute lymphoblastic leukemia (ALL) is an    aggressive cancer of the blood and bone marrow  the spongy    tissue inside bones where blood cells are made. The disease    progresses rapidly and affects immature blood cells, rather    than mature ones.(1) Worldwide, ALL accounts for more than 12    percent of leukemia. Of the 42,000 people diagnosed worldwide,    31,000 will die from the disease.(2)Patients with ALL    have abnormal white blood cells (lymphocytes) that crowd out    healthy white blood cells, red blood cells and platelets,    leading to infection, anemia (fatigue), easy bleeding and    serious side effects.(3,4)  
    AboutAmgenAmgen discovers, develops,    manufactures and delivers innovative human therapeutics. A    biotechnology pioneer since 1980, Amgen was one of the first    companies to realize the new science's promise by bringing    safe, effective medicines from lab to manufacturing plant to    patient. Amgen therapeutics have changed the practice of    medicine, helping millions of people around the world in the    fight against cancer, kidney disease, rheumatoid arthritis,    bone disease and other serious illnesses. With a deep and broad    pipeline of potential new medicines, Amgen remains committed to    advancing science to dramatically improve people's lives. To    learn more about our pioneering science and vital medicines,    visit     http://www.amgen.com/. Follow us on http://twitter.com/amgen.  
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Amgen's BiTE® Antibody Blinatumomab (AMG 103) Achieved High Rate of Complete Response in Adult Patients With Relapsed ...