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The assessment of zinc status of an animal from the uptake of 65Zn by the cells of whole blood in vitro

Published online by Cambridge University Press:  24 July 2007

J. K. Chesters
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
Marie Will
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Abstract

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1. 65Zn uptake by blood cells in vitro has been compared with plasma Zn concentration and plasma alkaline phosphatase (EC 3.1.3.1) activity as indicators of an animal's Zn status.

2. Dietary Zn deficiency, low food intake, reduced dietary protein content and endotoxin administration all reduced plasma Zn concentration in the rat. In each case there was a parallel reduction in plasma alkaline phosphatase activity and an increase in 65Zn uptake in vitro by cells of whole blood.

3. A similar relationship between the three measurements existed in sheep with lowered plasma Zn concentrations whether these were caused by dietary deficiency or by post-surgical stress.

4. 65Zn uptake by cells of whole blood did not differentiate dietary Zn deficiency from the other factors which reduce plasma Zn under ‘field’ conditions.

5. 65Zn uptake by the cells in whole blood in vitro was three to five times less rapid in blood of ruminant origin than in that from non-ruminants. This difference related to the erythrocytes rather than to the leukocytes or the plasma.

Type
Papers on General Nutrition
Copyright
Copyright © The Nutrition Society 1978

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