Figure 3.

VPF/VEGF induced VEGFR-2 phosphorylation is required for Src phosphorylation. (A) Kinase inhibitor (250 nM) inhibits VPF/VEGF induced VEGFR-2 Y1175 phosphorylatin. In the figure C-V is control, HUVEC without any VPF/VEGF or dopamine treatment, C+V is the HUVEC treated with only VEGF (10 ng/ml) for 15 min, C+KI+V is the HUVEC pretreated with kinase inhibitor (KINASE IV) for 30 min and treated with VPF/VEGF (10 ng/ml) for another 15 min (B) Pre-treatment of HUVEC with kinase inhibitor inhibits VEGF induced Src Y418 phosphorylation. In the figure C-V is control, HUVEC without any VPF/VEGF or dopamine treatment, C+V is the HUVEC treated with only VPF/VEGF (10 ng/ml) for 15 min, C+KI+V is the HUVEC pre-treated with kinase inhibitor for 30 min and treated with VPF/VEGF (10 ng/ml) for another 15 min and D+V is the HUVEC pretreated with 10 μM dopamine for 15 min and then treated with VPF/VEGF (10 ng/ml) for 15 min. The figures are representative of three separate experiments with similar results.