J. Anim Sci.
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J. Anim Sci. 1971. 32:1143-1152.
© 1971 American Society of Animal Science
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Influence of Site of Sampling and Stage of Fast on Concentrations of All Free Amino Acids in the Plasma and Liver in the Young Pig1

W. L. Stockland2, R. J. Meade, M. E. Tumbleson3 and B. W. Palm4

University of Minnesota, St. Paul 55101

Abstract

TYPPO et al. (1970) and Nordstrom et al. (1970) reported that peak levels of free essential amino acids in the plasma of young swine were reached at 2 to 4 hr. post-feeding. Free essential amino acids in the plasma had attained baseline levels by 8 to 12 hr. postfeeding, except for amino acids that were present in the diet in excess. Some amino acids increased in the plasma during the period from 18 to 36 hr. of fast, apparently as a result of tissue protein catabolism.

Patterns for concentrations of isoleucine, leucine, lysine, methionine, threonine and valine in plasma from the portal vein, abdominal aorta, posterior vena cava and jugular vein were similar during the posffeeding period (Nordstrom et al., 1970). With allowance for dilution of blood as it enters the general circulation, removal, of the six amino acids by the liver was indicated by the greater levels of amino acids in the portal vein than the abdominal aorta during the first 6 to 8 hr. post-feeding.

Footnotes

1 Paper No.7380 of the Scientific Journal Series of the Minnesota Agricultural Experiment Station.

2 Current address: Supersweet Feeds, International Multifoods Corp., Courtland, Minnesota.

3 Current address: College of Veterinary Medicine, University of Missouri, Columbia.

4 Current address: 8317 Goodrich Road, Minneapolis, Minnesota.






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Copyright © 1971 by the American Society of Animal Science.