Gene expression of VEGF and vWF in EPC cultured on PLA, BG20 and BG40 over a period of 5 days.

The values are given as fold change to the expression of the GAPDH gene which served as housekeeping gene (median value (25% quartile/75% quartile). Day 0 demonstrates the gene expression of the EPC before seeding on the biomaterials. Generally, gene epression of VEGF declined over the time whereas gene expression of vWF increased during the observation period. The experiment was performed with 4 independent EPC preparations. ↑ = increased gene expression; ↓ = decreased gene expression.