alexa MT1-MMP: a potent modifier of pericellular microenvironment.
Pathology

Pathology

Journal of Medical & Surgical Pathology

Author(s): Itoh Y, Seiki M

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Abstract Cells are regulated by many different means, and there is more and more evidence emerging that changes in the microenvironment greatly affect cell function. MT1-MMP is a type I transmembrane proteinase which participates in pericellular proteolysis of extracellular matrix (ECM) macromolecules. The enzyme is cellular collagenase essential for skeletal development, cancer invasion, growth, and angiogenesis. MT1-MMP promotes cell invasion and motility by pericellular ECM degradation, shedding of CD44 and syndecan1, and by activating ERK. Thus MT1-MMP is one of the factors that influence the cellular microenvironment and thereby affect cell-signaling pathways and eventually alters cellular behavior. As a proteinase, MT1-MMP is regulated by inhibitors, but it also requires formation of a homo-oligomer complex, localization to migration front of the cells, and internalization to become a "functionally active" cell function modifier. Developing new means to inhibit "functional activity" of MT1-MMP may be a new direction to establish treatments for the diseases that MT1-MMP mediates such as cancer and rheumatoid arthritis. Copyright 2005 Wiley-Liss, Inc. This article was published in J Cell Physiol and referenced in Journal of Medical & Surgical Pathology

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