Pharmacology
Mepolizumab is an IL-5 antagonist (IgG1 kappa) that binds IL-5 with high affinity, blocking its binding to the alpha chain of the IL-5 receptor complex on eosinophils, thereby inhibiting IL-5 signaling and reducing eosinophil production and survival.
TSLP blocker; tezepelumab-ekko is a human monoclonal antibody (IgG2lambda) that binds human thymic stromal lymphopoietin (TSLP) and blocks its interaction with the heterodimeric TSLP receptor, thereby reducing inflammatory biomarkers including blood eosinophils, IgE, FeNO, IL-5, and IL-13.