ORIGINAL PAPER
Comparison of the influence of different chemical forms of selenium and the profiles of CLA isomers in the diet on the fatty acid and amino acid contents in the liver and femoral muscles of rats
 
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The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 05-110 Jabłonna, Poland
CORRESPONDING AUTHOR
M. Czauderna   

The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 05-110 Jabłonna, Poland
Publication date: 2007-11-21
 
J. Anim. Feed Sci. 2007;16(4):678–695
 
KEYWORDS
ABSTRACT
The influence of diets enriched in 2% CLA isomer mixture (as CLAmixA or CLAmixB) and/or Se as selenate (SeVI) or selenized yeast (Se-Y) on the concentration of fatty acids (FA) and amino acids (AA) in the liver and femoral muscles was studied on 8 groups of 7-8 rats aged 8 weeks. Rats were fed a basal diet for 29 days or diets enriched with two combinations of 2% CLAmixA with/without 2 ppm Se (as SeVI) or 2% CLAmixB with/without 1.2 ppm Se (as Se-Y). The dietary CLAmixB containing the higher concentration of trans10cis12CLA (t10c12CLA) resulted in a higher decrease of body weight gain (BWG) (P<0.1) than the dietary CLAmixA with the lower concentration of t10c12CLA. The diet enriched in SeVI reduced the BWG (P<0.05) in rats. The dietary CLAmixA lowered the concentration of saturated FA (SFA), atherogenic SFA and thrombogenic SFA in the liver and muscles. The value of the Δ9-desaturase index decreased in the liver and muscles of rats fed the diet enriched in CLAmix A or CLAmixB compared with that in the control rats. There were significantly higher (P<0.01) concentrations of c9t11CLA, t10c12CLA, ccCLA and ttCLA in the muscles compared with the concentrations of these isomers in the liver of rats fed the diets enriched in CLAmix A or CLAmix B, regardless the presence of extra Se as SeVI or Se-Y. The ratio (Rt10c12/c9t11) of t10c12CLA and c9t11CLA in the liver and muscles of rats fed the diets enriched in CLA isomers was, regardless of the presence of Se, smaller compared with the values of Rt10c12/c9t11 in the dietary CLA isomers. The concentrations of CLA isomers tended to or significantly increased in the liver and muscles of rats fed diets containing Se and CLA isomers compared with rats fed the diets enriched in CLA isomers. The concentrations of PUFAn-3, PUFAn-6, PUFA and the ratio of PUFA/SFA decreased in the muscles of rats fed the diet with CLAmix A. The results suggest that the dietary CLAmixA containing the higher concentration of ttCLA, regardless of the presence of SeVI, more efficiently reduced the magnitude of lipoprotein synthesis in muscles than the diet containing CLAmixB with/without Se-Y, while dietary Se-Y most effectively reduced the anti-obesity properties of CLA isomers in rats. The diets enriched in CLA isomers (as CLAmixA or CLAmixB), regardless of the presence of SeVI, led to a decrease in the concentration of methionine (Met) in the liver and the concentration of all amino acids in the muscles, while increasing the concentration of Met in muscles.
 
CITATIONS (1):
1.
Effect of dietary organic selenium on fatty acid composition in nutria (Myocastor coypusMol.) livers
Robert Głogowski, Marian Czauderna, Agnieszka Rozbicka-Wieczorek, Katarzyna A. Krajewska
European Journal of Lipid Science and Technology
 
ISSN:1230-1388