MMP2 (matrix metalloproteinase 2) is a zinc-dependent and calcium-containing secreted endoproteinase that mediates proteolysis of extracellular matrix components and regulates cell migration and invasion 1. The protein functions through calcium-dependent signaling pathways; CCL5-directed glioma invasion requires MMP2 upregulation via calcium/calmodulin-dependent protein kinase II (CaMKII) activation 2. Beyond structural remodeling, MMP2 influences tumorigenesis—methylparaben exposure upregulates MMP2 to promote bladder cancer invasion 3, while SOX2 promotes bladder cancer invasion through nucleolin-mediated MMP2 mRNA stabilization 4. In non-malignant contexts, apolipoprotein A1 (APOA1) binds MMP2's catalytic and hemopexin-like domains, allosterically regulating its activity in circulation 5. Clinically, MMP2 gene polymorphisms associate with dilated cardiomyopathy susceptibility and prognosis; the rs243865-C allele increases MMP2 expression and correlates with poor outcomes 1. Environmental pollutants like methyl-4-hydroxybenzoate identify MMP2 as a hub target in glioblastoma development 6. Therapeutic targeting of MMP2—via farnesoid X receptor agonists—reduces bladder cancer migration and invasion 7, suggesting MMP2 inhibition as a potential cancer treatment strategy. MMP2's role in Multicentric osteolysis, nodulosis, and arthropathy indicates importance in bone and joint biology.