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Effect of diet on the metabolism of labelled tocopherol in sheep*

Published online by Cambridge University Press:  06 August 2007

M. Hidiroglou
M. Hidiroglou
Affiliation:
Animal Research Institute, Agriculture Canada, Ottawa, Ontario KIA OC6, Canada
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Abstract

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1. Eighteen crossbred wethers were allotted at random (six per treatment) to each of the following diets: (1) maize-silage; (2) grass-silage; and (3) chopped hay. After 6 months a single oral dose of D-α-[5-Me-3H]tocopherol was given to each sheep on these three treatments.

2. Blood plasma, rumen liquor and urine radioactivity were measured for 4 d and, at the end of this period, the animals were killed and tissue distribution of 3H was determined.

3. Maize-silage generally contained less α-tocopherol than grass-silage or hay. Tissue uptake of 3H was greater on maize-silage than other diets.

4. In muscle, spleen and liver, tocopherol concentrations were lower in the maize-silage than the grass-silage fed animals.

5. A tendency to higher uptake of radioactivity was recorded at all times in the plasma and its lipid extract of sheep fed on maize-silage than those fed on grass-silage or hay.

6. Urine clearance of radioactivity tended to be higher in animals fed on the maize-silage than those fed on grass-silage or hay. This difference of magnitude in urinary excretion was probably related to the rate of metabolism of the ingested radiotocopherol.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 37 , Issue 2 , March 1977 , pp. 215 - 225
Copyright
Copyright © The Nutrition Society 1977

References

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