S100A4, a Mediator of Metastasis*

S. Garrett,Kristen M. Varney,David J Weber,A. Bresnick

Published 2006 in Journal of Biological Chemistry

ABSTRACT

The transition from benign tumor growth to malignancy is manifested by the ability of tumor cells to traverse tissue barriers and invade surrounding tissues. The traversal of basement membrane barriers is thought to be the critical event in the initiation of themetastatic cascade and, as described by the three-step hypothesis of metastasis, involves attachment to the extracellular matrix, local proteolysis, and subsequentmigration (1). In recent years, a number of specific genes have been identified, the expressions of which correlate with tumorigenesis and/or metastatic potential. S100A4 is a member of the S100 family of calcium-binding proteins that is directly involved in tumor metastasis. This report reviews the animal and cellular studies implicating S100A4 in the establishment of the metastatic phenotype and examines the biochemical properties of S100A4 that are relevant to its role as a metastasis factor.

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