MMP12 antibodies are immunological tools designed to detect and quantify matrix metalloproteinase-12 (MMP12), a protease involved in extracellular matrix remodeling, immune modulation, and disease progression. These antibodies are critical for research and diagnostic applications, including Western blot (WB), immunohistochemistry (IHC), and immunofluorescence (IF) .
MMP12, also known as macrophage metalloelastase, is implicated in both physiological and pathological processes:
Asthma: MMP12 supports pulmonary B cell follicle formation and local antibody responses. Its absence in Mmp12−/− mice reduces germinal center B cells and allergen-specific IgE/IgA levels, impairing adaptive immunity .
Cancer: Overexpression in lung squamous cell carcinoma (LUSC) correlates with poor prognosis and immune cell infiltration. MMP12 facilitates tumor growth, invasion, and metastasis .
Vascular Remodeling: Cleaves N-cadherin to activate β-catenin signaling, promoting vascular smooth muscle proliferation .
Key antibodies and their applications:
| Parameter | WT Mice | KO Mice | Significance |
|---|---|---|---|
| Lung B cells | Increased | Reduced | p < 0.01 |
| Germinal Center B Cells | Present | Absent | p < 0.001 |
Asthma Pathogenesis: MMP12 processes CXCL13, a chemokine critical for B cell migration, reducing its binding to extracellular matrix heparan sulfate. This modulates pulmonary B cell aggregation and antibody production .
LUSC Immune Microenvironment: MMP12 overexpression activates antigen-presenting cells and correlates with CD8+ T cell exhaustion (r = 0.61, p < 0.001) .
Therapeutic Targets: Knockdown of MMP12 in lung adenocarcinoma models suppresses tumor growth by 40% (p < 0.01) .