When compared to the controls, vehicle-treated IPF, or normal (NL) cells, the sFasL levels decreased in the culture of IPF-lung myofibroblasts following treatment with the MMP inhibitor, from an OD of 1.8 ± 0.2SD to only 1.1 ± 0.1SD, compared with a decrease from 1.3 ± 0.1SD to 0.9 ± 0.2SD OD in the normal cells (Figure 1A; sFasL in IPF or NL cells +Ctrl or +MMP inhibitor). This evidence concerns the gene FASLG and idiopathic pulmonary fibrosis.