Figure 3From: Regulation of mammary gland branching morphogenesis by the extracellular matrix and its remodeling enzymesProposed morphogenic mechanisms mediated by matrix metalloproteinases (MMPs) and MMP inhibitors. At sites of invasion and migration (TEBs [terminal end buds], lateral side branches, invasive end buds), MMP activity may induce a transient epithelial-to-mesenchymal transition (EMT), thereby allowing the tip to move forward. Alternatively, high levels of MMP inhibitors may force an 'ameboid-like' movement, independent of MMP activity, through the meshwork of the extracellular matrix [96].Back to article page