Objective: We aimed to assess the percentage of peripheral blood B-lymphocytes expressing OX40 ligand (OX40L) in adult atopic and non-atopic asthmatic patients, and in healthy controls.
Methods: This case-control study included 15 atopic asthmatic patients, 15 non-atopic asthmatic patients, and 15 healthy controls. Atopic status was determined by skin prick test reaction to the most common locally-encountered allergens.