An interesting study was conducted by Brian S Comer et al., in which they compared miRNA-146a expression in human airway smooth muscle cells from patients without asthma and asthmatics treated with cytomix (IL-1β, TNF-α and IFNγ) and analysed the effect of miRNA-146a on COX-2 and IL-1β expression. This evidence concerns the gene IL1B and asthma.