GMPPA and neoplasm: Phosphorylation of Ser33/Ser37/Thr41 β-catenin and the endothelial cell apoptosis observed after treatment on HUVECs in vitro and on murine microvessels of tumor xenografts in vivo, support strongly that αAM and αAMR might act in the same manner on murine endothelial cells and HUVECs.