A 24-week double-blind, placebo-controlled trial published in JAMA showed stapokibart, a novel monoclonal antibody, significantly reduced nasal polyp size and symptom severity when combined with daily intranasal corticosteroids.
Stapokibart targets the interleukin-5 receptor alpha subunit (IL-5Rα) on eosinophils and basophils, effectively curtailing eosinophil survival and tissue infiltration to attenuate chronic inflammation responsible for polyp proliferation.
Patients treated with stapokibart reported notable improvements in nasal obstruction, rhinorrhea, facial pressure, and olfactory dysfunction, with clinically meaningful declines in SNOT-22 scores.
The therapy demonstrated a favorable safety profile with mild and transient side effects including nasopharyngitis and headache, with no serious adverse events or immunogenicity concerns reported.