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Effect of soya-bean protein on the ability of gnotobiotic pig intestine to digest and absorb nutrients

Published online by Cambridge University Press:  27 March 2009

B. Ratcliffe
Affiliation:
Department of Applied Chemistry and Life Sciences, The Polytechnic of North London, Holloway Road, London N7 8DB
M. W. Smith
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Babraham, Cambridge CB2 4 AT
B. G. Miller
Affiliation:
Department of Veterinary Medicine, University of Bristol, Langford, Bristol BS18 7DU
P. S. James
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Babraham, Cambridge CB2 4 AT
F. J. Bourne
Affiliation:
Department of Veterinary Medicine, University of Bristol, Langford, Bristol BS18 7DU

Summary

Gnotobiotic pigs were fed control and soya-bean protein containing diets in an attempt to identify direct effects of this protein on intestinal structure and function.

Feeding diets containing soya-bean protein for 4 days to 21-day-old gnotobiotic pigs increased crypt depth in the lower half of the small intestine. This increase was accompanied by a corresponding reduction in lactase activity, brought about mainly by a decrease in the apparent rate at which this enzyme appeared in the luminal membrane of developing enterocytes. Sucrase and maltase II and III activities increased slightly in tissue taken from pigs fed soya-bean protein. Alanine transport measured in the presence and absence of Na remained unaffected by change of diet.

The structure and function of control gnotobiotic pig intestine differed from that found in normal unweaned piglets. The possible source of these differences and the probable role played by enteric microflora in amplifying initial effects of soya-bean protein on intestinal function is discussed.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1989

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