Effect of acute stress on the absorption and distribution of zinc and on Zn-metallothionein production in the liver of the chick.
A study has been made of the effects of chloroform inhalation, Escherichia coli endotoxin injection and hydrocortisone injection on the absorption of a single intragastric dose of 65Zn by the chick. Injection of hydrocortisone increased the absorption of the 65Zn by 30-55% in both Zn-deficient and Zn-supplemented chicks. The influence of chloroform and endotoxin was less consistent; the former treatment only increased 65Zn absorption and endotoxin was less consistent; the former treatment only increased 65Zn absorption in Zn-supplemented chicks fed ad libitum whereas endotoxin only increased that in Zn-supplemented chicks on a restricted food intake. Injection of endotoxin increased the hepatic uptake of the absorbed 65Zn in both Zn-deficient and Zn-supplemented chicks, whereas hydrocortisone had a similar effect in the Zn-supplemented birds only. Chloroform inhalation increased hepatic 65Zn uptake in Zn-deficient chicks only. The increase in hepatic Zn concentrations in the stressed chicks was mainly associated with a protein in the cytosol identified as metallothionein. Both endotoxin and hydrocortisone decreased total plasma Zn concentrations in Zn-supplemented and Zn-deficient chicks; chloroform decreased plasma 65Zn content only.
D000818:Animals; D002645:Chickens; D002725:Chloroform / Q000494:pharmacology; D004731:Endotoxins / Q000494:pharmacology; D004926:Escherichia coli; D006854:Hydrocortisone / Q000494:pharmacology; D007408:Intestinal Absorption / Q000187:drug effects; D008070:Lipopolysaccharides / Q000494:pharmacology; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D008667:Metalloproteins / Q000378:metabolism*; D008668:Metallothionein / Q000378:metabolism*; D015032:Zinc / Q000378:metabolism*
D004731:Endotoxins; D008070:Lipopolysaccharides; D008667:Metalloproteins; D002725:Chloroform; D008668:Metallothionein; D015032:Zinc; D006854:Hydrocortisone