Cadherin switch in tumor progression.

Abstract:

:The loss of E-cadherin expression or function in epithelial carcinomas has long been thought as a primary reason for disruption of tight epithelial cell-cell contacts and release of invasive tumor cells from the primary tumor. Indeed, E-cadherin serves as a widely acting suppressor of invasion and growth of epithelial cancers, and its functional elimination represents a key step in the acquisition of the invasive phenotype for many tumors. Recent evidence indicates, however, that in addition to the loss of the "invasion-suppressor" E-cadherin, another adhesion molecule, N-cadherin, becomes upregulated in invasive tumor cell lines. N-cadherin was shown to be present in the most invasive and dedifferentiated breast cancer cell lines, and its exogenous expression in tumor cells induces a scattered morphology and heightened motility, invasion, and metastasis. N-cadherin cooperates with the FGF receptor, resulting in signals that lead to the up-modulation of MMP-9 and, hence, cellular invasion. In addition to a signaling function in metastasis, N-cadherin probably also supports the systemic dissemination of tumor cells by enabling circulating tumor cells to associate with the stroma and the endothelium at distant sites. Here, we summarize the various aspects of the E- to N-cadherin switching in epithelial carcinomas and its potential impact on metastatic progression.

journal_name

Ann N Y Acad Sci

authors

Hazan RB,Qiao R,Keren R,Badano I,Suyama K

doi

10.1196/annals.1294.016

subject

Has Abstract

pub_date

2004-04-01 00:00:00

pages

155-63

eissn

0077-8923

issn

1749-6632

journal_volume

1014

pub_type

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