VEGFA and diabetic retinopathy: These studies point to a central role of PDGF in recruiting pericytes to newly built blood vessels in the course of physiological angiogenesis during retinal development, but also in the context of pathological neovascularization as it occurs in diabetic retinopathy and age-related macular degeneration [1,2,3,4].The gold standard therapy of these diseases with medium-term success currently is the intravitreal injection of antibody derivates directed against vascular endothelial growth factor (VEGF; [5]).