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Beta-carotene (BC) uptake by endothelial progenitor cells (EPCs) (A) and human umbilical vein endothelial cells (HUVECs) (B). Cellular BC content was analyzed using high-performance liquid chromatography after a 24 h incubation of HUVECs and EPC with BC (3 μM) and arachidonic acid (AA) (3 μM). Values are expressed as means ± SEM. *P<0.05 versus control (n=10, performed in triplicates). THF/EtOH Tetrahydrofuran/ethanol
