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- W143184498 abstract "Protein breakdown products have a high affinity for Zn and may play a role in the intestinal absorption of this element. Na participates in the transport of certain amino acids and oligopeptides. Therefore, the authors investigated by intestinal perfusion the effectiveness of a protein hydrolysate (PrH) on rat jejunal (J) and ileal (I) absorption of Zn, in the absence or the presence of Na. When isotonic NaCl was present in perfusates containing 0.153 mM Zn, and PrH at a 2:1 molar ratio to the metal, Zn uptake in the J (means +/- SEM, in pmoles Zn/min x cm) declined from 389+/-14 in PrH-free to 254+/-11 with PrH, P<0.001. A comparable decline occurred in the I: 360+/-27 in PrH-free vs. 264+/-17 with PrH, P<0.001. In the absence of Na (isotonicity with glycerol), Zn absorption in the J was unchanged by the addition of PrH in the perfusates (436+/-25 in PrH-free vs. 469+/-21 with PrH, P=NS). In the I there was significant enhancement of Zn absorption (362+/-17 in PrH-free vs. 453+/-16 with PrH, P<0.01). These data indicate that, in both the J and the I, Na-linked uptake of PrH products may compete for transport sites with PrH:Zn complexes and thus reduce overallmore » Zn absorption. In the I, the enhancement of Zn absorption by PrH in the absence of Na is compatible with a Na-independent uptake of PrH:Zn chelates.« less" @default.
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- W143184498 date "1986-03-05" @default.
- W143184498 modified "2023-09-28" @default.
- W143184498 title "Zinc intestinal absorption: effect of protein hydrolysate" @default.
- W143184498 hasPublicationYear "1986" @default.
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