Moreover, in the transformed cystic fibrosis (CF) bronchial epithelial cell line CFBE41o-, the GC-induced increase of serum and GC dependent kinase 1 (SGK1) protein abundance enhanced ΔF508-CFTR [14] and wildtype (wt) CFTR membrane expression by inhibiting their endocytic retrieval [15]. This evidence concerns the gene CFTR and cystic fibrosis.