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- W2080828655 abstract "The effect of polyphenols (PPs) on the absorption of ochratoxin A (OTA), a food-borne mycotoxin, was investigated in an in vitro model of the human intestinal barrier based on Caco-2 cells cultivated in a bicameral system. Two intraluminal concentrations of OTA approaching physiological levels were chosen (0.75 nM and 7.5 nM) through calculations based on estimated daily intakes. The transport of OTA from the apical to the basolateral side of Caco-2 cells, i.e. absorption, was directly proportional to its initial apical concentration. Very significant increase in both OTA absorption and cellular accumulation was observed upon co-incubation with certain PPs, i.e. chrysin, quercetin, genistein, biochanin A, resveratrol, at concentrations that should be encountered in the gastrointestinal tract, as well as with MK571, a specific inhibitor of MRPs efflux pumps. As these PPs have been reported to be metabolized in Caco-2 cells into substrates of MRP-2, we hypothesize that PPs and/or metabolites could impair the OTA efflux, previously proposed to be mediated by the MRP-2, through competitive inhibition for the pump. These data imply that interactions between OTA and PPs may lead to a greater bioavailability of the mycotoxin in the bloodstream with possible adverse effects for human health." @default.
- W2080828655 created "2016-06-24" @default.
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- W2080828655 date "2005-10-01" @default.
- W2080828655 modified "2023-10-15" @default.
- W2080828655 title "Differential modulation of ochratoxin A absorption across Caco-2 cells by dietary polyphenols, used at realistic intestinal concentrations" @default.
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- W2080828655 doi "https://doi.org/10.1016/j.toxlet.2005.04.013" @default.
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