VEGF Ligand mRNA Expression. Mean (± SEM) mRNA expression for (A) PlGF, (B) VEGFB, (C) VEGFA, (D) VEGF Receptor 1 and (E) VEGF Receptor 2 in control and hypoxic rat lungs. All values are normalised to matched control group. * signifies significant difference from matched control (P < 0.05, ANOVA, post hoc Student Newman Keuls). N = 6-8 per group.