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Benralizumab (MEDI-563) is an interleukin-5 receptor α (IL-5Rα)-directed cytolytic monoclonal antibody that induces direct, rapid and nearly complete depletion of eosinophils via enhanced antibody-dependent cell-mediated cytotoxicity. Benralizumab can be used for severe eosinophilic asthma[1]. | [in vivo]
Benralizumab (MEDI-563) (0-30 mg/kg; i.v.; once every 3 weeks for 12 weeks) reduces peripheral blood and bone marrow eosinophil[2]. | Animal Model: | Female and male cynomolgus monkeys[2] | | Dosage: | 0.1, 1, 10, and 30 mg/kg | | Administration: | Intravenous injection, once every 3 weeks for 12 weeks | | Result: | Blood eosinophil counts decreased close to the limit of detection after the first administration at all dose levels and remained undetectable. Eosinophil precursors in the bone marrow were reduced 80% or greater in all doses 3 days after the last administration (terminal necropsy) and remained undetectable until 18 days after the last dose in the 30 mg/kg group. The profound effect observed in the bone marrow was specific for the eosinophil lineage. |
| [IC 50]
IL-5Rα | [References]
[1] Menzies-Gow A, et al. Corticosteroid tapering with benralizumab treatment for eosinophilic asthma: PONENTE Trial. ERJ Open Res. 2019 Sep 25;5(3). pii: 00009-2019. DOI:10.1183/23120541.00009-2019
[2] Kolbeck R, et al. MEDI-563, a humanized anti-IL-5 receptor alpha mAb with enhanced antibody-dependent cell-mediated cytotoxicity function. J Allergy Clin Immunol. 2010 Jun;125(6):1344-1353.e2. DOI:10.1016/j.jaci.2010.04.004 |
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