VEGF-A and Tenascin-C produced by S100A4 + stromal cells are important for metastatic colonization

Joyce T. O'Connell, Hikaru Sugimoto, Vesselina G. Cooke, Brian A. MacDonald, Ankit I. Mehta, Valerie S. LeBleu, Rajan Dewar, Rafael M. Rocha, Ricardo R. Brentani, Murray B. Resnick, Eric G. Neilson, Michael Zeisberg, Raghu Kalluri*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

192 Scopus citations

Abstract

Increased numbers of S100A4 + cells are associated with poor prognosis in patients who have cancer. Although the metastatic capabilities of S100A4 + cancer cells have been examined, the functional role of S100A4 + stromal cells in metastasis is largely unknown. To study the contribution of S100A4 + stromal cells in metastasis, we used transgenic mice that express viral thymidine kinase under control of the S100A4 promoter to specifically ablate S100A4 + stromal cells. Depletion of S100A4 + stromal cells significantly reduced metastatic colonization without affecting primary tumor growth. Multiple bone marrow transplantation studies demonstrated that these effects of S100A4 + stromal cells are attributable to local non-bone marrow-derived S100A4 + cells, which are likely fibroblasts in this setting. Reduction in metastasis due to the loss of S100A4 + fibroblasts correlated with a concomitant decrease in the expression of several ECM molecules and growth factors, particularly Tenascin-C and VEGF-A. The functional importance of stromal Tenascin-C and S100A4 + fibroblast-derived VEGF-A in metastasis was established by examining Tenascin-C null mice and transgenic mice expressing Cre recombinase under control of the S100A4 promoter crossed with mice carrying VEGF-A alleles flanked by loxP sites, which exhibited a significant decrease in metastatic colonization without effects on primary tumor growth. In particular, S100A4 + fibroblast-derived VEGF-A plays an important role in the establishment of an angiogenic microenvironment at the metastatic site to facilitate colonization, whereas stromal Tenascin-C may provide protection from apoptosis. Our study demonstrates a crucial role for local S100A4 +fibroblasts in providing the permissive "soil" for metastatic colonization, a challenging step in the metastatic cascade.

Original languageEnglish (US)
Pages (from-to)16002-16007
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume108
Issue number38
DOIs
StatePublished - Oct 20 2011

Keywords

  • Metastasis-associated fibroblasts
  • Metastatic microenvironment
  • Stromal fibroblasts
  • Tumor microenvironment

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'VEGF-A and Tenascin-C produced by S100A4 <sup>+</sup> stromal cells are important for metastatic colonization'. Together they form a unique fingerprint.

Cite this