Matrix metalloproteinase-12 (MMP-12) (MMP-12)

Matrix metalloproteinase-12 (MMP-12), also known as macrophage elastase, is a member of the matrix metalloproteinase family of zinc-dependent endopeptidases (UniProt P39900). It is primarily expressed and secreted by macrophages and is responsible for degrading various extracellular matrix (ECM) components, most notably elastin, but also type IV collagen, fibronectin, and laminin (PubMed: 24554307). MMP-12 plays a pivotal role in tissue remodeling and the inflammatory response, particularly in the lungs. Its overexpression is strongly linked to the development of chronic obstructive pulmonary disease (COPD) and emphysema, where it drives the destruction of alveolar walls (PubMed: 12181574). In addition to respiratory diseases, MMP-12 is involved in atherosclerosis and tumor progression. Therapeutic development has focused on selective small-molecule inhibitors, such as AZD9898 and FP-025, to mitigate tissue damage while avoiding the musculoskeletal toxicity often seen with non-selective MMP inhibitors (ClinicalTrials.gov: NCT03036150). Monitoring MMP-12 levels or elastin degradation products like desmosine serves as a potential biomarker strategy for clinical efficacy.

Other names

Macrophage metalloelastaseMacrophage elastaseMMEHMEMatrix metallopeptidase 12

Small molecule inhibition of the zinc-dependent catalytic domain to prevent the proteolysis of extracellular matrix substrates.