VEGFR1 (Flt1) regulates Rab4 recycling to control fibronectin polymerization and endothelial vessel branching

MC Jones, PT Caswell, K Moran-Jones, M Roberts, ST Barry, A Gampel, H Mellor, JC Norman

Research output: Contribution to journalArticle (Academic Journal)peer-review

34 Citations (Scopus)

Abstract

The cell’s main receptor for VEGF, VEGFR2 (Kdr) is one of the most important positive regulators of new blood vessel growth and its downstream signalling is well characterized. By contrast, VEGFR1 (Flt1) and the mechanisms by which this VEGF receptor promotes branching morphogenesis in angiogenesis remain relatively unclear. Here we report that engagement of VEGFR1 activates a Rab4A-dependent pathway that transports αvβ3 integrin from early endosomes to the plasmamembrane, and that this is required for VEGF-driven fibronectin polymerization in endothelial cells. Furthermore, VEGFR1 acts to promote endothelial tubule branching in an organotypic model of angiogenesis via a mechanism that requires Rab4A and αvβ3 integrin. We conclude that a recycling pathway regulated by Rab4A is a critical effector of VEGFR1 during branching morphogenesis of the vasculature.
Translated title of the contributionVEGFR1 (Flt1) regulates Rab4 recycling to control fibronectin polymerization and endothelial vessel branching
Original languageEnglish
Pages (from-to)754 - 766
Number of pages13
JournalTraffic
Volume10 (6)
DOIs
Publication statusPublished - Jun 2009

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