MMP-1, MMP-2, MMP-3, MMP-7, MMP-8, MMP-9, MMP-10, MMP-11, MMP-12, MMP-13, MMP-19, MMP-28, and tissue inhibitors of metalloproteases (TIMPs) exhibit roles in the progression and suppression of IPF [112,113,114]. The gene discussed is MMP9; the disease is idiopathic pulmonary fibrosis.