Fig. 2

Endothelial sprouts are formed in TeloHAEC fibrin bead assay in both normoxia and hypoxia. Representative confocal microscopy images of TeloHAEC fibrin bead assay samples at day 5 under A) normoxic and B) hypoxic conditions showing EC sprouting. In all images, F-actin is stained using phalloidin-A635 (red), and nuclei with DAPI (cyan). Scale bar, 200 µm. C-F) Quantitative image analysis showed increased EC sprouting in hypoxic condition. Images were analyzed using SproutAngio tool. n = 12–15 beads/group, 2 independent experiments. G) Human angiogenesis protein array result showed the difference between normoxic and hypoxic conditions in TeloHAEC bead assay (n = 2, 2 independent experiments). VCBM: Vascular cell basal medium.