IL17C and chronic obstructive pulmonary disease: As outlined in the introduction, Jamieson et al. demonstrated, in a recent study, that the release of IL-17C from cultured airway epithelial cells is synergistically induced by pathogens known being involved in AECOPD (e.g. rhinovirus and Gram-negative bacteria) and that its expression is increased in cells obtained from COPD patients [11].