Abstract
Hepatocyte growth factor (HGF) stimulates mitogenic, motogenic, and morphogenic responses in various cell types. We analysed HGF-responsive cells by differential display PCR to identify HGF-induced genes that mediate these biological events. One of the genes identified encoded a member of the tissue inhibitor of metalloproteinases (TIMP) family, TIMP-3. HGF transiently induced TIMP-3 mRNA in keratinocytes as well as kidney and mammary epithelial cells maximally between 4 and 6 h post-stimulation. Increased TIMP-3 protein secretion returned to basal levels within 18 h, while the expression of gelatinases A and B remained unchanged, suggesting that temporary suppression of matrix degradation is a delayed early response to HGF. Ectopic overexpression of TIMP-3 in cultured leiomyosarcoma cells conferred an epithelial morphology, reduced cell growth rate, anchorage-independent growth, and matrix invasion in vitro. Antisense suppression of TIMP-3 was associated with a scattered, fibroblastic cell morphology, as well as enhanced proliferation, anchorage-independent growth, and matrix invasion. A survey of tumor cell lines revealed an inverse relationship between metastatic potential and TIMP-3 expression level. These data suggest that early, transient TIMP-3 expression mediates specific HGF-induced phenotypic changes, and that loss of TIMP-3 expression may enhance the invasion potential of certain tumors.
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Castagnino, P., Soriano, J., Montesano, R. et al. Induction of tissue inhibitor of metalloproteinases-3 is a delayed early cellular response to hepatocyte growth factor. Oncogene 17, 481–492 (1998). https://doi.org/10.1038/sj.onc.1201957
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DOI: https://doi.org/10.1038/sj.onc.1201957
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