Benralizumab--a humanized mAb to IL-5Rα with enhanced antibody-dependent cell-mediated cytotoxicity--a novel approach for the treatment of asthma.

INTRODUCTION: Benralizumab is a monoclonal antibody that binds the α subunit of the receptor to IL-5. As IL-5 is implicated in disease states that are mediated by eosinophils, benralizumab is an attractive option for use in the management of asthma. As a result of enhanced antibody-directed cell cytotoxicity, it has enhanced eosinophil-depleting activity as compared with neutralizing monoclonal antibody directed against IL-5. AREAS COVERED: This review presents the available data on benralizumab, including pharmacodynamics, pharmacokinetics, preclinical data and relevant clinical studies. EXPERT OPINION: Our review indicates that although further investigation is necessary to demonstrate clinical benefit, benralizumab remains a promising treatment modality.