Effect of a linseed diet on lipogenesis, fatty acid composition and stearoyl-CoA-desaturase in rabbits
Benatmane , Fatiha (INRA , Saint Gilles (France). UMR 1079 Systèmes d'Elevage, Nutrition Animale et Humaine) | Kouba , Marilyne(auteur de correspondance) (INRA , Saint Gilles (France). UMR 1079 Systèmes d'Elevage, Nutrition Animale et Humaine) | Youyou , A. (Institut National Agronomique, Algiers El-Harrach(Algérie). Département de Technologie Alimentaire) | Mourot , Jacques (INRA , Saint Gilles (France). UMR 1079 Systèmes d'Elevage, Nutrition Animale et Humaine)
The aim of the study was to examine the effect of a linseed diet on meat quality and on lipogenesis in rabbits. Twelve rabbits were fed a control or a linseed diet. There was no diet effect on growth, food consumption, carcass characteristics and meat ultimate pH and colour. Feeding the linseed diet increased the n-3 polyunsaturated fatty acids (PUFA) levels in perirenal and interscapular fats, in the Longissimus dorsi muscle and in the liver. The linseed diet produced lower linoleic acid/alpha-linolenic acid ratios in adipose tissues and in the Longissimus dorsi muscle, but not in the liver. Diet did not affect lipogenic enzyme activities in the Longissimus dorsi muscle, whereas the linseed diet decreased the lipogenic potential in perirenal and interscapular fats, and in the liver. Feeding rabbits with a high n-3 PUFA diet led to a decrease in the oxidative stability of perirenal fat and the Longissimus dorsi muscle, and to an inhibition of stearoyl-CoA-desaturase activity in liver and in adipose tissues, but not in muscle.
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