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  • Title: Association of the HGF/SF receptor, c-met, with the cell-surface adhesion molecule, E-cadherin, and catenins in human tumor cells.
    Author: Hiscox S, Jiang WG.
    Journal: Biochem Biophys Res Commun; 1999 Aug 02; 261(2):406-11. PubMed ID: 10425198.
    Abstract:
    Tumour cell metastatic potential is significantly enhanced following treatment with HGF/SF, the ligand for the c-met receptor tyrosine kinase. Following c-met activation in tumour cells, phosphorylation of beta-catenin occurs, together with loss of intercellular adhesion and a gain in the motile and invasive nature of the cell. In this study we show that c-met is co-localised with beta-catenin and E-cadherin at regions of cell-cell contact in human colon cancer (HRT18 and HT115) and two breast cancer (MCF7 and MDA MB 231) cell lines. Immunoprecipitation studies demonstrated an association between c-met and members of the cadherin adhesion complex in these epithelial tumour cells, along with the membrane tyrosine protein phophatase, PTPmu. We conclude that the HGF/SF receptor, c-met, together with members of the cadherin/catenin cell-cell adhesion system and PTPmu, may form part of a protein complex in E-cadherin positive tumour cells that acts to regulate intercellular adhesion following HGF/SF stimulation.
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