Upregulation of MMPs by soluble E-cadherin in human lung tumor cells.
Fiche publication
Date publication
juillet 2003
Journal
International journal of cancer
Auteurs
Membres identifiés du Cancéropôle Est :
Pr POLETTE Myriam
Tous les auteurs :
Nawrocki-Raby B, Gilles C, Polette M, Bruyneel E, Laronze JY, Bonnet N, Foidart JM, Mareel M, Birembaut P
Lien Pubmed
Résumé
Loss of E-cadherin/catenin mediated cell-cell adhesion and overexpression of matrix metalloproteinases (MMPs) are largely involved in tumor invasion. It has been recently shown that high levels of a soluble 80 kDa fragment of E-cadherin, resulting from a cleavage by MMPs, are found in serum and in urine from cancer patients. Additionally, this soluble E-cadherin (sE-CAD) promotes cell invasion into chick heart and into collagen type I gels. The aim of our study was to examine the mechanism of sE-CAD-induced cell invasion. Since MMPs play a crucial role in invasion, we looked for induction of MMPs by sE-CAD in noninvasive human lung tumor cells 16HBE. An induction of MMP-2, MMP-9 and MT1-MMP expression was observed both at the mRNA and at the protein level in the presence of sE-CAD (in conditioned medium form or in E-cadherin HAV peptide form). No induction of MMP-1, -3 and -7 or variation of the levels of their inhibitors, TIMP-1 and TIMP-2, were detected. The biologic relevance of the sE-CAD-induced MMP upregulation was tested by demonstrating that sE-CAD promotes in vitro cell invasion in a modified Boyden chamber assay. These data provide new insight into mechanisms of tumor invasion by ectodomain shedding of the cell-cell adhesion molecule E-cadherin.
Mots clés
Cadherins, pharmacology, Gene Expression Regulation, Neoplastic, Humans, Lung Neoplasms, enzymology, Matrix Metalloproteinases, biosynthesis, Neoplasm Invasiveness, RNA, Messenger, biosynthesis, Tumor Cells, Cultured, Up-Regulation
Référence
Int. J. Cancer. 2003 Jul;105(6):790-5