The Benefit of Benralizumab Monoclonal Antibody Treatment for Severe Eosinophilic Asthma in a Case Series (Pulmonology Clinic Târgu Mureș, Romania)

Abstract

Background: Monoclonal antibody therapy is currently an additional treatment option to reduce exacerbations and improve symptom control in patients with severe eosinophilic asthma (SEA) that is uncontrolled despite treatment with high-dose inhaled corticosteroids and long-acting beta-2 agonists. Benralizumab, a monoclonal antibody that binds to the interleukin-5 receptor (IL-5), significantly reduces symptoms and annual exacerbations, as well as the use of systemic corticosteroids in patients with SEA. However, few studies are available on the effectiveness of this biological treatment in real life. The aim of this case series was to evaluate the efficacy of benralizumab by analyzing changes in clinical parameters and blood eosinophils in patients with SEA. Methods: We analyzed four patients with SEA who started treatment with benralizumab. The history of symptoms and exacerbations, eosinophil counts, data regarding the oral corticosteroid dose, need for rescue treatment, spirometry measurements and asthma control questionnaires (ACT) regarding the level of asthma control were recorded. A positive response to treatment was defined by a significant reduction in eosinophil counts, increased ACT scores, and lower rates of exacerbations. Results and conclusions: Benralizumab monoclonal antibody was effective in all four patients. This was shown by a reduction in exacerbation rates, symptom severity, and lower dose of oral corticosteroids and rescue medication. This novel treatment was well tolerated by the analyzed patients, thus indicating that benralizumab is an attractive choice for patients due to eosinophilic count reduction as well as the less frequent dosing schedule. However, further studies are required, on larger populations.