Extracellular matrix protein betaig-h3/TGFBI promotes metastasis of colon cancer by enhancing cell extravasation.

Journal Article (Journal Article)

Metastasis, the major cause of cancer death, is a multistep process that requires interactions between cancer cells and stromal cells and between cancer cells and extracellular matrix. Molecular alterations of the extracellular matrix in the tumor microenvironment have a considerable impact on the metastatic process during tumorigenesis. Here we report that elevated expression of betaig-h3/TGFBI (transforming growth factor, beta-induced), an extracellular matrix protein secreted by colon cancer cells, is associated with high-grade human colon cancers. Ectopic expression of the betaig-h3 protein enhanced the aggressiveness and altered the metastatic properties of colon cancer cells in vivo. Inhibition of betaig-h3 expression dramatically reduced metastasis. Mechanistically, betaig-h3 appears to promote extravasation, a critical step in the metastatic dissemination of cancer cells, by inducing the dissociation of VE-cadherin junctions between endothelial cells via activation of the integrin alphavbeta5-Src signaling pathway. Thus, cancers associated with overexpression of betaig-h3 may have an increased metastatic potential, leading to poor prognosis in cancer patients.

Full Text

Duke Authors

Cited Authors

  • Ma, C; Rong, Y; Radiloff, DR; Datto, MB; Centeno, B; Bao, S; Cheng, AWM; Lin, F; Jiang, S; Yeatman, TJ; Wang, X-F

Published Date

  • February 1, 2008

Published In

Volume / Issue

  • 22 / 3

Start / End Page

  • 308 - 321

PubMed ID

  • 18245446

Pubmed Central ID

  • PMC2216691

International Standard Serial Number (ISSN)

  • 0890-9369

Digital Object Identifier (DOI)

  • 10.1101/gad.1632008


  • eng

Conference Location

  • United States