CCL20 and asthma: The induction of chemokines CCL20 and IL–8/CXCL8 by GCs was previously reported in human macrophages (16), enhanced CCL20 expression was reported in GC-insensitive neutrophilic airway inflammation in asthma (17) and elevated CCL20 expression was found in keratinocytes in GC-exacerbated skin conditions (18).