The effects of dietary conjugated linoleic acid (CLA) on fatty acid composition and key enzymes of fatty acid oxidation in liver and muscle of geese

Authors : Xuhui ZHANG, Baowei WANG, Fangyu LONG, Lei WANG, Zhigang YANG

Pages : 215-222

View : 20 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The objective of this study was to determine the influence of conjugated linoleic acid insert ignore into journalissuearticles values(CLA); on fatty acid composition and key enzymes of fatty acid oxidation in liver and muscle of geese. A total of 192 1-day-old geese were randomly assigned to 1 of 4 dietary groups, and were fed for 56 days on diets containing 2.5% soybean oil insert ignore into journalissuearticles values(group A, control group); or 2.0% soybean oil with 0.5% CLA insert ignore into journalissuearticles values(group B);, 1.0% soybean oil with 1.5% CLA insert ignore into journalissuearticles values(group C);, and 2.5 % CLA insert ignore into journalissuearticles values(group D);. Geese fed CLA had a decreased abdominal fat percentage insert ignore into journalissuearticles values(AFP); insert ignore into journalissuearticles values(P < 0.01); compared with the control. It was observed that dietary CLA levels had a significant effect on the body weight, weight gain, feed conversion rate insert ignore into journalissuearticles values(FCR); insert ignore into journalissuearticles values(P < 0.05);, and feed intake insert ignore into journalissuearticles values(P < 0.01);. Fatty acid composition showed a significant increase of the biologically active cis-9, trans-11 and trans-10, and cis-12 CLA isomers in both liver and muscle of geese fed CLA insert ignore into journalissuearticles values(P < 0.01);. Dietary CLA led to an increase insert ignore into journalissuearticles values(P < 0.01); in saturated fatty acid insert ignore into journalissuearticles values(SFA); and a reduction in monounsaturated fatty acid insert ignore into journalissuearticles values(MUFA); insert ignore into journalissuearticles values(P < 0.05); concentrations in both liver and muscle. In liver, dietary CLA increased insert ignore into journalissuearticles values(P < 0.05); acyl CoA oxidase insert ignore into journalissuearticles values(ACO); activity, but did not affect carnitine palmitoyltransferase-I insert ignore into journalissuearticles values(CPT-I); activity compared with the control. CPT-I activity was significantly increased by 2.5% dietary CLA in muscle, where ACO activity was decreased at 1.5% CLA level. The results obtained suggested that geese can successfully incorporate CLA in both liver and muscle, which could be beneficial in the human diet, through provision of bioactive fatty acids with no detrimental effects on n-3 PUFA levels.
Keywords : Conjugated linoleic acid, CLA, fatty acid oxidation, key enzymes, geese