The study of McKinley et al., was the first to demonstrate that IL-17-producing Th17 cells are able to promote airway neutrophilia and corticoid resistance by using adoptive transfer of in vitro-differentiated Th17 cells from DO11.10 TCR-transgenic mice to mice undergoing induction of ovalbumin (OVA)-induced experimental allergic asthma [60]. Here, IL17A is linked to allergic asthma.