Journal
CANCER RESEARCH
Volume 77, Issue 13, Pages 3431-3441Publisher
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/0008-5472.CAN-16-1917
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Funding
- ERC [STARLIN 311263]
- Marie Curie Individual Fellowship (FiBRO)
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The interaction between circulating tumor cells (CTC) and endothelial cells during extravasation is a critical process during metastatic colonization, but its mechanisms remain poorly characterized. Here we report that the luminal side of liver blood vessels contains fibronectin deposits that are enriched in mice bearing primary tumors and are also present in vessels from human livers affected with metastases. Cancer cells attached to endothelial fibronectin deposits via talin1, a major component of focal adhesions. Talin1 depletion impaired cancer cell adhesion to the endothelium and transendothelial migration, resulting in reduced liver metastasis formation in vivo. Talin1 expression levels in patient CTC's correlated with prognosis and therapy response. Together, our findings uncover a new mechanism for liver metastasis formation involving an active contribution of hepatic vascular fibronectin and talin1 in cancer cells. (C) 2017 AACR.
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