Figure 3: Stabilization of endothelial VE-cadherin junctions blocks melanoma-induced gap formation and subsequent endothelial barrier breakdown.

HPMEC monolayers were treated with FGF1 for 1 hour and immediately cultured in direct contact with A2058 melanoma cells for 0, 10, 45 and 90 min. Endothelial cell junctions were immunostained with anti-VE-cadherin and gap formation was quantified as the number of pixels within gap regions over the number of pixels within the entire image. Results represent the mean +/−SEM, (***p < 0.001 in comparison to monolayers treated with FGF-1 at equal times, n = 3).