DNMT1 and cystic fibrosis: Since P. aeruginosa is a major pathogen in infections of lungs affected by cystic fibrosis, we then examined DNMT expression in the human cystic fibrosis bronchial epithelial cell line CFBE41o- complemented with the wild type cystic fibrosis transmembrane conductance regulator (CFTR) gene after P. aeruginosa infection for 1 hour using publicly available data (GSE30439) [17].