Severe asthma and long-term Benralizumab effectiveness in real-life

OBJECTIVE: Long-term efficacy of Benralizumab in real life is not clearly known. We assessed the long-term effectiveness persistence to anti-IL-5R treatment in a group of severe eosinophilic asthmatics.PATIENTS AND METHODS: We retrospectively analyzed 95 individuals affected by severe asthma (36 males. 37.9%; mean age 58.1 +/- 12.2) treated with Benralizumab (mean time 19.7 +/- 7.2 months, range 12-35). Outcomes were evaluated at the beginning and at the end of patients' treatment periods.RESULTS: Mean baseline blood eosinophils were 897.5 +/- 720.1 cells/mu L (11 +/- 5.6%) decreasing to 7.4 +/- 20.6 cells/mu L (0.97 +/- 0.26%; p < 0.0001) a fter B enralizumab. FENO likewise decreased from 63.9 +/- 68.4 to 28.4 +/- 23.6 ppb, while FEV1% significantly improved (p < 0.0001). Mean FEF25-75 also increased from 45.8 +/- 24.6% to 60.7 +/- 24.6%, whereas RAW dropped from 202.15 +/- 109.6% to 135.2 +/- 54.75% (p < 0.0001). Also, lung volumes greatly decreased. ACT/ACQ significantly improved, while exacerbations number fell from 4.1 +/- 2.4, before anti-IL-5R, to 0.33 +/- 0.77, after treatment (p < 0.0001). Rhinitis severity levels and SNOT-22 also changed favorably. Patients that took long-term OCs were 71.6% before treatment, decreasing to 23.2% after Benralizumab (p < 0.0001), with an OCs dose reduction from 14.8 +/- 8.9 to 1.45 +/- 2.8 mg/day (p < 0.0001). 51.6% of subjects used SABA as needed before Benralizumab, falling to 4.2% after treatment. Several patients showed a reduction of ICS doses, SA-BA use and maintenance therapy step-down. Clinical/biological response with anti-IL-5R remained constant or even improved in terms of exacerbations or maintenance therapy reductions over time. On the contrary, FEF25-75% improvement slowed down in the long-term. No relationship was found between baseline blood eosinophil number and therapeutic response.CONCLUSIONS: Long-term Benralizumab effectiveness persistence in all outcomes in real life was confirmed.