Moreover, 12 genes from this secreted list (IGF1, LTBP1, SULF1, SFRP2, COL15A1, MMP1, CFI, COL3A1, AGER, WNT7A, CDH13, and CRTAC1) are potentially associated with pulmonary fibrosis. This evidence concerns the gene MMP1 and pulmonary fibrosis.