Cadherin-5

Cadherin-5, widely called VE-cadherin and encoded by CDH5, is the endothelium-specific classical cadherin that defines vascular adherens junctions. Homophilic VE-cadherin bonds control endothelial monolayer integrity, and their regulated disassembly governs vascular permeability. The cytoplasmic tail binds p120-catenin and beta-catenin, and VE-cadherin forms complexes with VEGFR-2 that amplify VEGF signaling, tying adhesion directly to angiogenic sprouting. Genetic ablation in mice blocks vascular remodeling and causes embryonic lethality. Because VE-cadherin also stabilizes nascent tumor vessels, antibodies and inhibitors directed at the molecule are explored as vascular-disrupting and anti-angiogenic agents. The junctional molecule is therefore central to both developmental angiogenesis and vascular normalization strategies in tumors.