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Cdc42 promotes transendothelial migration of cancer cells through β1 integrin.

Reymond, N; Im, JH; Garg, R; Vega, FM; Borda d'Agua, B; Riou, P; Cox, S; Valderrama, F; Muschel, RJ; Ridley, AJ (2012) Cdc42 promotes transendothelial migration of cancer cells through β1 integrin. J Cell Biol, 199 (4). 653 - 668. https://doi.org/10.1083/jcb.201205169
SGUL Authors: Valderrama, Ferran

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Abstract

Cancer cells interact with endothelial cells during the process of metastatic spreading. Here, we use a small interfering RNA screen targeting Rho GTPases in cancer cells to identify Cdc42 as a critical regulator of cancer cell-endothelial cell interactions and transendothelial migration. We find that Cdc42 regulates β1 integrin expression at the transcriptional level via the transcription factor serum response factor (SRF). β1 integrin is the main target for Cdc42-mediating interaction of cancer cells with endothelial cells and the underlying extracellular matrix, as exogenous β1 integrin expression was sufficient to rescue the Cdc42-silencing phenotype. We show that Cdc42 was required in vivo for cancer cell spreading and protrusion extension along blood vessels and retention in the lungs. Interestingly, transient Cdc42 depletion was sufficient to decrease experimental lung metastases, which suggests that its role in endothelial attachment is important for metastasis. By identifying β1 integrin as a transcriptional target of Cdc42, our results provide new insight into Cdc42 function.

Item Type: Article
Additional Information: PMCID: PMC3494849
Keywords: Animals, Antigens, CD29, Cell Adhesion, Cell Line, Tumor, Cells, Cultured, Endothelial Cells, Fibronectins, Gene Expression Regulation, Neoplastic, Humans, Lung Neoplasms, Mice, Mice, SCID, Neoplasm Metastasis, Neoplasm Transplantation, Protein Transport, Serum Response Factor, Transcription, Genetic, Transendothelial and Transepithelial Migration, cdc42 GTP-Binding Protein, rac1 GTP-Binding Protein, rhoA GTP-Binding Protein
SGUL Research Institute / Research Centre: Academic Structure > Institute of Medical & Biomedical Education (IMBE)
Academic Structure > Institute of Medical & Biomedical Education (IMBE) > Centre for Biomedical Education (INMEBE)
Journal or Publication Title: J Cell Biol
Dates:
DateEvent
12 November 2012Published
PubMed ID: 23148235
Web of Science ID: 23148235
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URI: https://openaccess.sgul.ac.uk/id/eprint/101249
Publisher's version: https://doi.org/10.1083/jcb.201205169

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