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- W146458846 abstract "Abstract The Caco-2 cell line grown in bicameral chambers was used to study the effect of transferrin in the basal chamber on the transepithelial transport of iron. We have shown that when iron was offered as59Fe on the apical surface of the Caco-2 cells, transport of 59Fe into the basal chamber was stimulated by 50 μmol/L apotransferrin. Here, we examined the effect on59Fe transport of lower concentrations of apotransferrin, as well as the effects on transport of ovo-, cobalt-, and ferri-transferrin and of iron chelators with an affinity for iron greater than that of transferrin. The stimulation of 59Fe transport was more sensitive to the presence of apotransferrin with a Km of 0.078 ± 0.008 μmol/L compared with ferri-transferrin with a Km of 1.24 ± 0.39 μmol/L (P < .006). 59Fe transport was less sensitive to diethylenetriaminopenta-acetic acid (DTPA) than apotransferrin with Kms of 1.52 ± 0.70. The chelator nitrilotriacetic acid (NTA) exhibited no stimulation of59Fe transport. Analysis of laser scanning confocal micrographs showed that apotransferrin labeled with Texas Red is internalized by Caco-2 cells from the basal side and localizes in distinct vesicles above the nucleus. The sensitivity of apotransferrin in stimulating Fe transport suggests a unique interaction of apotransferrin with the basal surface of the intestinal epithelium." @default.
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- W146458846 date "1998-05-15" @default.
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- W146458846 title "The Effect of Apotransferrin on Iron Release From Caco-2 Cells, an Intestinal Epithelial Cell Line" @default.
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- W146458846 doi "https://doi.org/10.1182/blood.v91.10.3974" @default.
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