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Effect of different contents of extruded linseed in the sow diet on piglet fatty acid composition and hepatic desaturase expression during the post-natal period

Published online by Cambridge University Press:  28 June 2013

F. de Quelen ,
G. Boudry  and
J. Mourot
F. de Quelen
Affiliation:
INRA, UR1341 ADNC, F-35000 Rennes, France INRA, UMR1348 PEGASE, F-35000 Rennes, France Valorex, F-35210 Combourtillé, France
G. Boudry
Affiliation:
INRA, UR1341 ADNC, F-35000 Rennes, France
J. Mourot*
Affiliation:
INRA, UMR1348 PEGASE, F-35000 Rennes, France
*
†E-mail: Jacques.mourot@rennes.inra.fr
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Abstract

n-3 polyunsaturated fatty acids (n-3 PUFA) contribute to the normal growth and development of numerous organs in the piglet. The fatty acid composition of piglet tissues is linked to the fatty acid composition of sow milk and, consequently, to the composition of sow diet during the gestation and lactation period. In this study, we investigated the impact of different contents of extruded linseed in the sow diet on the fatty acid composition and desaturase gene expression of piglets. Sows received a diet containing either sunflower oil (low 18:3n-3 with 18:3n-3 representing 3% of total fatty acids) or a mixture of extruded linseed and sunflower oil (medium 18:3n-3 with 9% of 18:3n-3) or extruded linseed (high 18:3n-3 with 27% of 18:3n-3) during gestation and lactation. Fatty acid composition was evaluated on sow milk and on different piglet tissues at days 0, 7, 14, 21 and 28. The postnatal evolution of delta5 (D5D) and delta6 (D6D) desaturase mRNA expression was also measured in the liver of low 18:3n-3 and high 18:3n-3 piglets. The milk of high 18:3n-3 sows had higher proportions of n-3PUFA than that of low 18:3n-3 and medium 18:3n-3 sows. Piglets suckling the high 18:3n-3 sows had greater proportions of 18:3n-3, 20:5n-3, 22:5n-3 and 22:6n-3 in the liver, and of 22:5n-3 and 22:6n-3 in the brain than low 18:3n-3 and medium 18:3n-3 piglets. D5D and D6D mRNA expressions in piglet liver were not affected by the maternal diet at any age. In conclusion, extruded linseed in the sow diet modifies the n-3PUFA status of piglets during the postnatal period. However, a minimal content of 18:3n-3 in the sow diet is necessary to increase the n-3PUFA level in piglet liver and brain. Moreover, modifications in the n-3PUFA fatty acid composition of piglet tissue seem linked to the availability of 18:3n-3 in maternal milk and not to desaturase enzyme expression.

Keywords

n-3 polyunsaturated fatty acid, sow diet, piglet, fatty acid composition, desaturase gene expression
Type
Physiology and functional biology of systems
Information
animal , Volume 7 , Issue 10 , October 2013 , pp. 1671 - 1680
Copyright
Copyright © The Animal Consortium 2013 

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