Previously, our ChIP‐seq analyses determined that NKX2‐1 and FOXA3 bound to the locus of MUC5AC in A549 lung carcinoma cells and BEAS‐2B transformed bronchial epithelial cells (Maeda et al, 2012; Chen et al, 2014), suggesting that the expression of MUC5AC is directly regulated by NKX2‐1 and FOXA3. This evidence concerns the gene MUC5AC and lung carcinoma.