Growth factors—proteins regulating the divisions and differentiations of cells—involved in asthma include: Epidermal Growth Factor (EGF), Fibroblast Growth Factor (FGF), Transforming Growth Factors (TGFs), Vascular Endothelial Growth Factor (VEGF), Platelet Derived Growth Factor (PDGF)—described in more detail in this article—and other. This evidence concerns the gene VEGFA and asthma.