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- W2978098693 abstract "Contamination of human and animal diets with different mycotoxins have gained significant attention over the past decade. The intestinal barrier is the first site of exposure and a primary target for nutritional contaminants and hazardous substances including mycotoxins. In this study, the potential impact of ochratoxin A (OTA) on intestinal barrier integrity was highlighted using a human intestinal Caco-2 cell line. Cell viability following OTA exposure was determined by lactate dehydrogenase release and the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Moreover, markers of barrier integrity, such as transepithelial electrical resistance (TEER) as well as the permeability of Lucifer Yellow (LY) and fluorescein isothiocyanate (FITC)-dextran, were assessed. Furthermore, the protein expression of different tight junction (TJ) proteins, as main constituents of barrier integrity, was evaluated by Western blot. Results show that OTA reduces TEER values in a concentration- and time-dependent manner and increase the permeability of LY through the intestinal epithelial layer, while the cell viability did not change significantly. However, the damage was not severe enough to change the permeability to larger molecules, such as FITC-dextran. OTA exposure down-regulated the expression of TJ proteins claudin-1, -3 and -4 and up-regulated the expression of zona occludens 1. The observation that OTA can disrupt the epithelial barrier is of clinical importance as it may lead to an increased passage of luminal antigens into the systemic circulation." @default.
- W2978098693 created "2019-10-10" @default.
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- W2978098693 date "2019-12-04" @default.
- W2978098693 modified "2023-09-25" @default.
- W2978098693 title "Ochratoxin A challenges the intestinal epithelial cell integrity: results obtained in model experiments with Caco-2 cells" @default.
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- W2978098693 doi "https://doi.org/10.3920/wmj2019.2451" @default.
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