RhoJ integrates attractive and repulsive cues in directional migration of endothelial cells

ABSTRACT: During angiogenesis, VEGF acts an attractive cue for endothelial cells (ECs) while Sema3E mediates repulsive cues. Here, we show that the small GTPase RhoJ integrates these opposing signals in directional EC migration. In the GTP-bound state, RhoJ interacts with the cytoplasmic domain of PlexinD1. Upon Sema3E stimulation, RhoJ is released from PlexinD1 inducing cell contraction. PlexinD1-bound RhoJ further facilitates Sema3E-induced PlexinD1-VEGFR2 association, VEGFR2 transphosphorylation at Y1214, and p38 MAPK activation, leading to reverse EC migration. Upon VEGF stimulation, RhoJ is required for the formation of the holoreceptor complex comprising VEGFR2, PlexinD1, and neuropilin-1, thereby preventing degradation of internalized VEGFR2, prolonging downstream signal transductions via PLC

SUBMITTER: Dr. Yoko Fukushima 

PROVIDER: S-SCDT-EMBOJ-2019-102930 | biostudies-other |

REPOSITORIES: biostudies-other