KDR and neoplasm: Specifically, agrin has been found to act in endothelial cells (ECs) by an ECM stiffness based mechanism similar to that described in tumor cells, although the mechanotransduction axis would not involve the activation of YAP/TAZ but rather the stabilization of VEGFR2 (Vascular Endothelial Growth Factor Receptor 2), a master regulator of ECs migration, proliferation and angiogenesis.