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The effect of glucose infusion on the plasma free amino acids in sheep

Published online by Cambridge University Press:  09 March 2007

N. W. Offer ,
M. V. Tas ,
R. F. E. Axford  and
R. A. Evans
N. W. Offer
Affiliation:
Department of Biochemistry and Soil Science, Memorial Buildings, Bangor, Gwynedd LL57 2UW, Wales
M. V. Tas
Affiliation:
Department of Biochemistry and Soil Science, Memorial Buildings, Bangor, Gwynedd LL57 2UW, Wales
R. F. E. Axford
Affiliation:
Department of Biochemistry and Soil Science, Memorial Buildings, Bangor, Gwynedd LL57 2UW, Wales
R. A. Evans
Affiliation:
Department of Biochemistry and Soil Science, Memorial Buildings, Bangor, Gwynedd LL57 2UW, Wales
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Abstract

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1. Glucose in solution in saline, or saline alone, was administered to a group of twenty ewes during late pregnancy and again after lambing. Sequential blood samples were taken before and after the infusion and the concentration of plasma free amino acids was determined.

2. The effect of glucose was to reduce the concentrations of all amino acids except alanine. The reduction was greatest for tryptophan in the pregnant sheep, but this amino acid showed no significant change in the lactating animals.

3. An attempt to rank the amino acids on the basis of their response to glucose infusion indicated that, with the exception of tryptophan for the preparturient ewes, groups of essential amino acids could not be distinguished from each other. These groups were, for the preparturient sheep, valine, leucine, phenylalanine and isoleucine, and for the postparturient animals, isoleucine, lysine, methionine, valine and phenylalanine.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 34 , Issue 3 , November 1975 , pp. 375 - 382
Copyright
Copyright © The Nutrition Society 1975

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