Journal of Nutrition

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Journal of Nutrition Vol. 109 No. 10 October 1979, pp. 1752-1758
Copyright © 1979 by American Society for Nutrition
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The Relationship of Plasma Arginine and Kidney Arginase Activity to Arginine Degradation in Chickens1

Shu-Heh W. Chu2 and M. C. Nesheim

Division of Nutritional Sciences, Savage Hall, Cornell University, Ithaca, New York 14853

Experiments were carried out to study urea excretion during arginine or ornithine infusion into wing veins of hens previously fed diets that induced different arginase levels in their kidneys. Urea excretion was found to increase as plasma arginine increased. Hens with high levels of arginase activity in their kidneys had a greater increase in urea excretion than hens with low kidney arginase activity. Arginine degradation was also dependent on both the kidney arginase activity and on the plasma level of arginine. Ornithine infusion did not inhibit urea excretion even when high levels of plasma ornithine were reached. Even though ornithine was an in vitro inhibitor of arginase, no evidence was obtained of in vivo inhibition.

KEY WORDS: • arginine • arginase • ornithine • arginine degradation

1 Supported in part by National Institutes of Health Grant No. AM06850.

2 Present address: Department of Nutrition, Harvard School of Publie Health, Boston, Massachusetts 02115.

Manuscript received 6 November 1978.


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R. O. Ball, K. L. Urschel, and P. B. Pencharz
Nutritional Consequences of Interspecies Differences in Arginine and Lysine Metabolism
J. Nutr., June 1, 2007; 137(6): 1626S - 1641S.
[Abstract] [Full Text] [PDF]


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