Protease and Inhibitor Mechanisms

Matrix metalloproteinases are a family of zinc-dependent enzymes that degrade and remodel the extracellular matrix, the structural scaffold surrounding cells, and in doing so they regulate processes ranging from normal tissue repair to the spread of cancer. In malignant disease, MMPs help tumors invade surrounding tissue, stimulate the growth of new blood vessels, and modulate inflammatory signals that shape the tumor microenvironment — while their natural counterparts, the tissue inhibitors of metalloproteinases, work to restrain this activity. The balance between these two forces turns out to be far more complex than a simple on/off switch, since certain MMPs can paradoxically suppress tumor progression depending on context, which has complicated decades of drug development. Current research focuses on understanding the precise spatiotemporal regulation of individual MMP family members and on designing inhibitors selective enough to block harmful activity without disrupting the protective roles these enzymes play in healthy tissue.

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Keywords

Matrix MetalloproteinasesTissue Inhibitors of MetalloproteinasesCancer ProgressionAngiogenesisExtracellular Matrix RemodelingProtease Inhibition