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J Cell Biol. 2015 Mar 30;208(7):975-86. doi: 10.1083/jcb.201408103. Epub 2015 Mar 23.

Intramembrane binding of VE-cadherin to VEGFR2 and VEGFR3 assembles the endothelial mechanosensory complex.

Author information

1
Yale Cardiovascular Research Center and Department of Internal Medicine, Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT 06510 Yale Cardiovascular Research Center and Department of Internal Medicine, Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT 06510.
2
Université Pierre and Marie Curie-Paris 6, 75005 Paris, France Institut National de la Santé et de la Recherche Médicale/Centre National de la Recherche Scientifique U-1127/UMR-7225, 75654 Paris, France Assistance Publique-Hôpitaux de Paris, Groupe Hospitalier Pitié-Salpètrière, 75013 Paris, France Department of Cell Biology, Department of Biomedical Engineering, and Department of Neurology, Yale University, New Haven, CT 06520.
3
Yale Cardiovascular Research Center and Department of Internal Medicine, Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT 06510 Yale Cardiovascular Research Center and Department of Internal Medicine, Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT 06510 Department of Cell Biology, Department of Biomedical Engineering, and Department of Neurology, Yale University, New Haven, CT 06520 Department of Cell Biology, Department of Biomedical Engineering, and Department of Neurology, Yale University, New Haven, CT 06520 Martin.Schwartz@yale.edu.

Abstract

Endothelial responses to fluid shear stress are essential for vascular development and physiology, and determine the formation of atherosclerotic plaques at regions of disturbed flow. Previous work identified VE-cadherin as an essential component, along with PECAM-1 and VEGFR2, of a complex that mediates flow signaling. However, VE-cadherin's precise role is poorly understood. We now show that the transmembrane domain of VE-cadherin mediates an essential adapter function by binding directly to the transmembrane domain of VEGFR2, as well as VEGFR3, which we now identify as another component of the junctional mechanosensory complex. VEGFR2 and VEGFR3 signal redundantly downstream of VE-cadherin. Furthermore, VEGFR3 expression is observed in the aortic endothelium, where it contributes to flow responses in vivo. In summary, this study identifies a novel adapter function for VE-cadherin mediated by transmembrane domain association with VEGFRs.

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PMID:
25800053
PMCID:
PMC4384728
DOI:
10.1083/jcb.201408103
[Indexed for MEDLINE]
Free PMC Article

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