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Li, Xiujuan; Padhan, Narendra; Sjöström, Elisabet O; Roche, Francis P; Testini, Chiara; Honkura, Naoki; Sáinz-Jaspeado, Miguel; Gordon, Emma; Bentley, Katie; Philippides, Andrew; Tolmachev, Vladimir; Dejana, Elisabetta; Stan, Radu V; Vestweber, Dietmar; Ballmer-Hofer, Kurt; Betsholtz, Christer; Pietras, Kristian; Jansson, Leif; Claesson-Welsh, Lena
Nature communications, 03/2016, Letnik: 7, Številka: 1Journal Article
The specific role of VEGFA-induced permeability and vascular leakage in physiology and pathology has remained unclear. Here we show that VEGFA-induced vascular leakage depends on signalling initiated via the VEGFR2 phosphosite Y949, regulating dynamic c-Src and VE-cadherin phosphorylation. Abolished Y949 signalling in the mouse mutant Vegfr2(Y949F/Y949F) leads to VEGFA-resistant endothelial adherens junctions and a block in molecular extravasation. Vessels in Vegfr2(Y949F/Y949F) mice remain sensitive to inflammatory cytokines, and vascular morphology, blood pressure and flow parameters are normal. Tumour-bearing Vegfr2(Y949F/Y949F) mice display reduced vascular leakage and oedema, improved response to chemotherapy and, importantly, reduced metastatic spread. The inflammatory infiltration in the tumour micro-environment is unaffected. Blocking VEGFA-induced disassembly of endothelial junctions, thereby suppressing tumour oedema and metastatic spread, may be preferable to full vascular suppression in the treatment of certain cancer forms.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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