TSLP and lung disorder: This idea is supported by the fact that siRNA knockdown of E‐cadherin results in epidermal growth factor receptor (EGFR)‐dependent production of Th2‐promoting cytokines thymus‐ and activation‐regulated chemokine (TARC) and thymic stromal lymphopoietin (TSLP) by airway epithelial cells that explains the association between barrier dysfunction and Th2‐driven pulmonary disease.115