Increased IL-18 and IL-18BP in asthmatic patientsThe ratio of plasma level of IL-18 to IL-18BP in asthma patients was 1:12.8.The expression of IL-18BP over IL-18 were 13-fold more in monocytes, 17.5-fold more in neutrophils and 4.1-fold more in B cells from asthmatic blood.Higher IL-18R+ monocytes, neutrophils and B cells are located in asthmatic blood. Here, IL18BP is linked to asthma.