ReviewThe World Allergy Organization journal2025
Benralizumab: Bringing winds of change to eosinophil-associated diseases.
Review in The World Allergy Organization journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
The majority of patients with severe asthma have an eosinophilic phenotype. Interleukin-5 (IL-5) plays a key role in the pathophysiology of severe eosinophilic asthma (SEA) through its effects on eosinophil maturation, survival, and recruitment to the airways. Benralizumab is an anti-IL-5 receptor α (IL-5Rα) monoclonal antibody that binds to IL-5R on eosinophils. Binding of benralizumab to IL-5R blocks IL-5 binding and leads to eosinophil cell death via natural killer cell-mediated antibody-dependent cellular cytotoxicity, macrophage-mediated antibody-dependent cellular phagocytosis/efferocytosis, and tumour necrosis factor receptor 1-mediated apoptosis; the result is the removal of eosinophils from blood and tissue. Benralizumab was approved for the treatment of SEA in 2017 based on the WINDWARD clinical trial programme, which included the pivotal phase 3 trials SIROCCO and CALIMA. Subsequent clinical studies, as well as real-world evidence studies, have reinforced the efficacy of benralizumab for the treatment of SEA and provided evidence about its safety and tolerability profile, including in children. Clinical data have also demonstrated that reduction of background medications, such as oral and inhaled corticosteroids, is possible in patients with SEA controlled with benralizumab. Benralizumab has been investigated for the treatment of other eosinophil-associated diseases, including a phase 3 study for eosinophilic granulomatosis with polyangiitis (EGPA) in which benralizumab was non-inferior to the anti-IL-5 monoclonal antibody mepolizumab: as a result, benralizumab was recently approved for the treatment of EGPA. Phase 3 studies are ongoing with benralizumab for the treatment of hypereosinophilic syndrome and chronic obstructive pulmonary disease.
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