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Article Dans Une Revue Nature Communications Année : 2019

Endophilin-A2 dependent VEGFR2 endocytosis promotes sprouting angiogenesis

Résumé

Endothelial cell migration, proliferation and survival are triggered by VEGF-A activation of VEGFR2. However, how these cell behaviors are regulated individually is still unknown. Here we identify Endophilin-A2 (ENDOA2), a BAR-domain protein that orchestrates CLATHRIN-independent internalization, as a critical mediator of endothelial cell migration and sprouting angiogenesis. We show that EndoA2 knockout mice exhibit postnatal angiogenesis defects and impaired front-rear polarization of sprouting tip cells. ENDOA2 deficiency reduces VEGFR2 internalization and inhibits downstream activation of the signaling effector PAK but not ERK, thereby affecting front-rear polarity and migration but not proliferation or survival. Mechanistically, VEGFR2 is directed towards ENDOA2-mediated endocytosis by the SLIT2-ROBO pathway via SLIT-ROBO-GAP1 bridging of ENDOA2 and ROBO1. Blocking ENDOA2-mediated endothelial cell migration attenuates pathological angiogenesis in oxygen-induced retinopathy models. This work identifies a specific endocytic pathway controlling a subset of VEGFR2 mediated responses that could be targeted to prevent excessive sprouting angiogenesis in pathological conditions.
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Dates et versions

hal-02149348 , version 1 (06-06-2019)

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Gaël Genet, Kevin Boyé, Thomas Mathivet, Roxana Ola, Feng Zhang, et al.. Endophilin-A2 dependent VEGFR2 endocytosis promotes sprouting angiogenesis. Nature Communications, 2019, 10 (1), ⟨10.1038/s41467-019-10359-x⟩. ⟨hal-02149348⟩
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