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Effects of intramammary arterial infusion of essential amino acids in the lactating goat

Published online by Cambridge University Press:  01 June 2009

J. L. Linzell  and
T. B. Mepham
J. L. Linzell
Affiliation:
A.R.C. Institute of Animal Physiology, Babraham, Cambridge
T. B. Mepham
Affiliation:
University of Nottingham, Faculty of Agricultural Science, Sutton Bonington, Loughborough, LE12 5RD
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Summary

Experiments were performed on 3 lactating goats, in which mammary arterial plasma amino-acid concentrations were elevated by the infusion of a solution of essential amino-acids into the carotid artery supplying a transplanted mammary gland. In 2 experiments there were marked elevations in the arterial concentrations of most essential amino acids, but in one case only did this result in significantly increased uptake of amino acids by the gland, the arterio-venous difference being significantly correlated with arterial concentration for all except one amino acid. In the experiment in which increased amino-acid uptake was observed, infusion also resulted in a significantly increased milk yield and increased milk protein yield. The results are discussed in relation to data from other laboratories and lead to the suggestion that milk protein synthesis may be limited by the availability of either methionine or tryptophan.

Type
Research Article
Information
Journal of Dairy Research , Volume 41 , Issue 1 , February 1974 , pp. 101 - 109
Copyright
Copyright © Proprietors of Journal of Dairy Research 1974

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References

REFERENCES

Annison, E. F. & Linzell, J. L. (1964). Journal of Physiology 175, 372.CrossRefGoogle Scholar
Chalmers, M. I. (1971). Proceedings of the 17th Easter School in Agricultural Science, University of Nottingham, 1970. Lactation, p. 379. (Ed. Falconer, I. R..) London: Butterworths.Google Scholar
Dickman, S. R. & Crockett, A. L. (1956). Journal of Biological Chemistry 220, 957.CrossRefGoogle Scholar
Fisher, L. J. (1972). Canadian Journal of Animal Science 52, 377.CrossRefGoogle Scholar
Glascock, R. F., Welch, V. A., Bishop, C., Davies, T., Wright, E. W. & Noble, R. C. (1966). Bio-chemical Journal 98, 149.CrossRefGoogle Scholar
Linzell, J. L. (1960). Journal of Physiology 153, 492.CrossRefGoogle Scholar
Linzell, J. L. (1963). Quarterly Journal of Experimental Physiology 48, 34.CrossRefGoogle Scholar
Linzell, J. L. (1966). Journal of Physiology 186, 79P.Google Scholar
Linzell, J. L. (1967). Journal of Physiology 190, 333.CrossRefGoogle Scholar
McCarthy, R. D., Patton, R. A. & Griel, L. C. Jr (1970). Federation Proceedings 29, 41.Google Scholar
Mepham, T. B. (1971). Proceedings of the 17th Easter School in Agricultural Science, University of Nottingham, 1970. Lactation, p. 297. (Ed. Falconer, I. R..) London: Butterworths.Google Scholar
Mepham, T. B. & Linzell, J. L. (1966). Biochemical Journal 101, 76.CrossRefGoogle Scholar
Mepham, T. B. & Linzell, J. L. (1974). Journal of Dairy Research 41, 95.CrossRefGoogle Scholar
Reis, P. J. (1967). Australian Journal of Biological Science 20, 809.CrossRefGoogle Scholar