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Roles of matrix metalloproteinases in tumor metastasis and angiogenesis Yoon SO; Park SJ; Yun CH; Chung ASJ Biochem Mol Biol 2003[Jan]; 36 (1): 128-37Matrix metalloproteinases (MMPs), zinc dependent proteolytic enzymes, cleave extracellular matrix (ECM: collagen, laminin, firbronectin, etc) as well as non-matrix substrates (growth factors, cell surface receptors, etc). The deregulation of MMPs is involved in many diseases, such as tumor metastasis, rheumatoid arthritis, and periodontal disease. Metastasis is the major cause of death among cancer patients. In this review, we will focus on the roles of MMPs in tumor metastasis. The process of metastasis involves a cascade of linked, sequential steps that involve multiple host-tumor interactions. Specifically, MMPs are involved in many steps of tumor metastasis. These include tumor invasion, migration, host immune escape, extravasation, angiogenesis, and tumor growth. Therefore, without MMPs, the tumor cell cannot perform successful metastasis. The activities of MMPs are tightly regulated at the gene transcription levels, zymogen activation by proteolysis, and inhibition of active forms by endogenous inhibitors, tissue inhibitor of metalloproteinase (TIMP), and RECK. The detailed regulations of MMPs are described in this review.|Animals[MESH]|Cell Movement[MESH]|Gene Expression Regulation, Enzymologic[MESH]|Humans[MESH]|Matrix Metalloproteinases/*physiology[MESH]|Neoplasm Metastasis/*physiopathology[MESH]|Neoplasms/*blood supply/immunology/*pathology[MESH]|Neovascularization, Pathologic/*enzymology/immunology[MESH] |
