NFKB1 and pulmonary fibrosis: In order to investigate the effect of NF-κB on the phenotypic transformation of lung Fbs in the pathological process of bleomycin-induced pulmonary fibrosis and research the preventive effect of NF-κB antisense oligonucleotide on bleomycin-induced pulmonary fibrosis in mice, primary culture of lung tissues of mice in pulmonary fibrosis model group and NF-κB antisense oligonucleotide treatment group was performed.