These results demonstrate for the first time that P-Rex1 expressed in endothelial cells is activated downstream of TNF-α, which is not a G protein-coupled receptor agonist. Our data identify P-Rex1 as a critical mediator of vascular barrier disruption. Targeting P-Rex1 may effectively protect against TNF-α- and lipopolysaccharide-induced endothelial junction disruption and vascular hyperpermeability.
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Naikawadi et al. (2012) studied this question.
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