| First Author | Genet G | Year | 2019 |
| Journal | Nat Commun | Volume | 10 |
| Issue | 1 | Pages | 2350 |
| PubMed ID | 31138815 | Mgi Jnum | J:283500 |
| Mgi Id | MGI:6323877 | Doi | 10.1038/s41467-019-10359-x |
| Citation | Genet G, et al. (2019) Endophilin-A2 dependent VEGFR2 endocytosis promotes sprouting angiogenesis. Nat Commun 10(1):2350 |
| abstractText | 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. |
