Bleomycin-induced pulmonary fibrosis, the golden standard of modelling pulmonary fibrosis in mice, leads to bronchiolocentric accentuated fibrotic changes, acute interstitial and intra-alveolar inflammation, macrophage activation and up-regulation of TNFα, granulocyte-macrophage colony-stimulating factor and some interleukins (Della Latta et al., 2015). The gene discussed is TNF; the disease is pulmonary fibrosis.