IL17A and asthma: Several of those pathways have known roles in allergy, namely TNFR2 Signalling, Interferon Signalling, Differential Regulation of Cytokine Production in Intestinal Epithelial Cells by IL-17A and IL-17F, Airway Inflammation in Asthma, Glucocorticoid Receptor Signalling and T Helper Cell Differentiation.