Document Detail

Effect of dietary fat sources on fatty acid deposition and lipid metabolism in broiler chickens.
MedLine Citation:
PMID:  20952707     Owner:  NLM     Status:  MEDLINE    
The hypothesis tested was that dietary vegetable fats rich in saturated fatty acids, when compared with a vegetable oil rich in linoleic acid, increase fat deposition in broiler chickens and affect synthesis or oxidation, or both, of individual fatty acids. Diets with native sunflower oil (SO), a 50:50 mix of hydrogenated and native SO, palm oil, and randomized palm oil were fed to broiler chickens. Intake of digestible fat and fatty acids, whole body fatty acid deposition, hepatic fatty acid profile, and hepatic enzyme activities involved in fatty acid oxidation and synthesis were measured. The fat deposition:digestible fat intake ratio was significantly lower for the SO group in comparison with the groups fed the vegetable fats rich in saturated fatty acids. The difference between digestible intake and deposition of C18:2, reflecting its maximum disappearance rate, was highest for the SO group and lowest for the palm oil- and randomized palm oil-fed birds. The calculated minimal rate of de novo synthesis of monounsaturated fatty acids (MUFA), calculated as deposition minus digestible intake, was more than 50% lower for the SO group than for the other 3 dietary groups. Based on the fatty acid profiles in the liver, it would appear that increasing contents of C18:2 decrease the desaturation of saturated fatty acids into MUFA. It is concluded that a diet rich in C18:2 in comparison with different kinds of vegetable saturated fatty acids decreases the deposition of fat, especially of MUFA. It appears to be caused by a higher β-oxidation and a reduced de novo synthesis of MUFA, but this conclusion is not fully supported by the measured activities of enzymes involved in fatty acid synthesis and oxidation.
W Smink; W J J Gerrits; R Hovenier; M J H Geelen; M W A Verstegen; A C Beynen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Poultry science     Volume:  89     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-10-18     Completed Date:  2010-12-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2432-40     Citation Subset:  IM    
Feed Innovation Services (FIS) BV, Generaal Foulkesweg 72, 6703 BW, Wageningen, Netherlands.
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MeSH Terms
Acetyl-CoA Carboxylase / metabolism
Chickens / metabolism*
Citrate (si)-Synthase / metabolism
Dietary Fats / pharmacology*
Fatty Acid Synthetase Complex / metabolism
Fatty Acids / metabolism*
Fatty Acids, Monounsaturated / metabolism
Fatty Acids, Unsaturated / metabolism*
Lipid Metabolism* / drug effects
Liver / enzymology,  metabolism
Plant Oils / metabolism
Reg. No./Substance:
0/Dietary Fats; 0/Fatty Acids; 0/Fatty Acids, Monounsaturated; 0/Fatty Acids, Unsaturated; 0/Plant Oils; EC (si)-Synthase; EC 6.-/Fatty Acid Synthetase Complex; EC Carboxylase

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