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. 2016 Oct;57(10):1865–1878. doi: 10.1194/jlr.M070193

Fig. 7.

Fig. 7.

Interactions of carotenoids during cell uptake. Impact of increasing concentrations (1, 3, and 5 μM) of lutein or β-carotene on cell uptake of 1 μM zeaxanthin (A) and impact of increasing concentrations (1, 3, and 5 μM) of zeaxanthin or β-carotene on cell uptake of 1 μM lutein (B). Xanthophyll cell uptake is represented as a percentage of the control without the added carotenoid [1 μM zeaxanthin (A) or 1 μM lutein (B) only]. Whole serum was separately enriched with the given amounts of carotenoids and added at the same time. The total amount of whole serum added to each treatment was the same. Cells were analyzed for carotenoid content after 4 h using HPLC. Data are mean ± SD of three independent experiments. *P < 0.05 compared with the control treatment.