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Effects of diets containing casein and rapeseed on enzyme secretion from the exocrine pancreas in the pig

Published online by Cambridge University Press:  09 March 2007

P. Valette ,
H. Malouin ,
T. Corring ,
L. Savoie ,
A. M. Gueugneau  and
S. Berot
P. Valette
Affiliation:
Laboratoire d'Ecologie et de Physiologie du Système Digestif, INRA-CRJ, 78352 Jouy en Josas cédex, France
H. Malouin
Affiliation:
Departement de nutrition humaine et de consommation FSAA, Université Laval, Québec, Canada G1K 7P4
T. Corring
Affiliation:
Laboratoire d'Ecologie et de Physiologie du Système Digestif, INRA-CRJ, 78352 Jouy en Josas cédex, France
L. Savoie
Affiliation:
Departement de nutrition humaine et de consommation FSAA, Université Laval, Québec, Canada G1K 7P4
A. M. Gueugneau
Affiliation:
Laboratoire d'Ecologie et de Physiologie du Système Digestif, INRA-CRJ, 78352 Jouy en Josas cédex, France
S. Berot
Affiliation:
Laboratoire d'Ecologie et de Physiologie du Système Digestif, INRA-CRJ, 78352 Jouy en Josas cédex, France
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Abstract

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The effect of dietary protein on enzyme activity of pancreatic juice was studied in ten growing, castrated, Large White male pigs. Animals, fitted with permanent cannulas in the pancreatic duct and in the duodenum, were divided into two groups receiving either casein or rapeseed concentrate as a protein source. After a 15 d adaptation period to the experimental diet, the volume of pancreatic secretion was significantly higher, whereas the protein concentration was lower in the casein group compared with the rapeseed group. No statistical difference was observed in the daily protein output between groups. Total secreted activities of carboxypeptidase A (EC 3.4.17.1), and elastase (EC 3.4.21.36) were higher in the casein group during the nocturnal period, whereas total activities of trypsin (EC 3.4.21.4), chymotrypsin (EC 3.4.21.1), carboxypeptidase B (EC 3.4.17.2) and amylase (EC 3.2.1.1) in pancreatic secretions during the post-prandial periods were increased by the ingestion of the rapeseed diet. It is concluded that the pancreatic enzyme secretion is sensitive to the nature of the protein ingested.

Keywords

Dietary proteinsCaseinRapeseedPancreatic juicePigs
Type
Metabolism Effects of Diet
Information
British Journal of Nutrition , Volume 67 , Issue 2 , March 1992 , pp. 215 - 222
Copyright
Copyright © The Nutrition Society 1992

References

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