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Impairing flow-mediated endothelial remodeling reduces extravasation of tumor cells

Paul Nicodème; Busnelli Ignacio; Gensbittel Valentin; Osmani Naël; Larnicol Annabel; Asokan Nandini; Pichot Angelique; Lefebvre Olivier; Garcia-Leon Maria Jesus; Carapito Raphaël; Goetz Jacky G.; Bahram Seiamak; Follain Gautier; Mercier Luc

Impairing flow-mediated endothelial remodeling reduces extravasation of tumor cells

Paul Nicodème
Busnelli Ignacio
Gensbittel Valentin
Osmani Naël
Larnicol Annabel
Asokan Nandini
Pichot Angelique
Lefebvre Olivier
Garcia-Leon Maria Jesus
Carapito Raphaël
Goetz Jacky G.
Bahram Seiamak
Follain Gautier
Mercier Luc
Katso/Avaa
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NATURE RESEARCH
doi:10.1038/s41598-021-92515-2
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Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021093048419
Tiivistelmä

Tumor progression and metastatic dissemination are driven by cell-intrinsic and biomechanical cues that favor the growth of life-threatening secondary tumors. We recently identified pro-metastatic vascular regions with blood flow profiles that are permissive for the arrest of circulating tumor cells. We have further established that such flow profiles also control endothelial remodeling, which favors extravasation of arrested CTCs. Yet, how shear forces control endothelial remodeling is unknown. In the present work, we aimed at dissecting the cellular and molecular mechanisms driving blood flow-dependent endothelial remodeling. Transcriptomic analysis of endothelial cells revealed that blood flow enhanced VEGFR signaling, among others. Using a combination of in vitro microfluidics and intravital imaging in zebrafish embryos, we now demonstrate that the early flow-driven endothelial response can be prevented upon specific inhibition of VEGFR tyrosine kinase and subsequent signaling. Inhibitory targeting of VEGFRs reduced endothelial remodeling and subsequent metastatic extravasation. These results confirm the importance of VEGFR-dependent endothelial remodeling as a driving force of CTC extravasation and metastatic dissemination. Furthermore, the present work suggests that therapies targeting endothelial remodeling might be a relevant clinical strategy in order to impede metastatic progression.

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