Freda Yang

Sputum eosinophil and neutrophil activation biomarkers in severe asthma

Background Asthma is characterized by different inflammatory phenotypes. We hypothesized that sputum eosinophil-derived neurotoxin (EDN), and myeloperoxidase (MPO) or interleukin-8 (IL-8) levels improves the granulocytic characterization of asthma compared to sputum granulocyte c...