- Loss of placental growth factor protects mice against vascular permeability in pathological conditions. Luttun, A., Brusselmans, K., Fukao, H., Tjwa, M., Ueshima, S., Herbert, J.M., Matsuo, O., Collen, D., Carmeliet, P., Moons, L. Biochem. Biophys. Res. Commun. (2002)