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Conjugated linoleic acid decreases fat accretion in pigs evaluation by dual-energy X-ray absorptiometry

Ostrowska, Ewa, Suster, Danny, Muralitharan, Morley, Cross, Reg F., Leury, Brian J., Bauman, Dale E. and Dunshea, Frank R. 2003, Conjugated linoleic acid decreases fat accretion in pigs evaluation by dual-energy X-ray absorptiometry, British journal of nutrition, vol. 89, no. 2, pp. 219-229, doi: 10.1079/BJN2002765.

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Title Conjugated linoleic acid decreases fat accretion in pigs evaluation by dual-energy X-ray absorptiometry
Author(s) Ostrowska, Ewa
Suster, Danny
Muralitharan, Morley
Cross, Reg F.
Leury, Brian J.
Bauman, Dale E.
Dunshea, Frank R.
Journal name British journal of nutrition
Volume number 89
Issue number 2
Start page 219
End page 229
Publisher CABI Publishing
Place of publication Cambridge, England
Publication date 2003-02
ISSN 0007-1145
1475-2662
Keyword(s) conjugated linoleic acid
dual-energy X-ray absorptiometry
body composition
pig
Summary Thirty female Large White × Landrace pigs (average weight 57·2 (SD 1·9) kg) were allocated to one of six dietary treatments containing 0, 1·25, 2·5, 5·0, 7·5 or 10·0 g 55 % conjugated linoleic acids (CLA) isomers (CLA-55)/kg diet and fed for 8 weeks. Each pig was scanned at 0, 28 and 56 d and again at post slaughter using dual-energy X-ray absorptiometry (DXA) to determine the temporal pattern of body composition responses. Values determined by DXA were adjusted using regression equations generated from validation experiments between chemically and DXA-predicted values. Overall, there was a significant linear reduction in fat content with the increasing levels of CLA in the diet (P=0·007, P=0·011, P=0·008 at week 4, week 8 and for the carcass, respectively). The greatest improvement was recorded at the early stages of CLA supplementation and for the highest dose of CLA (week 4, -19·2 % compared with week 8, -13·7 %). In the first 4 weeks of feeding CLA, pigs receiving 10 g CLA-55/kg diet deposited 93 g less fat/d than pigs fed basal diets (P=0·002) compared with only 6 g less fat than control animals in the final 4 weeks. Lean content and lean deposition rate were maximised at 5 and 2·5 g CLA-55/kg diet for the first 4 weeks (P=0·016) and the final 4 weeks of treatment (P=0·17), respectively. DXA estimates of bone mineral content and bone mineral density were not affected by CLA supplementation throughout the experiment. These data demonstrate that dietary CLA decreases body fat in a dose-dependent manner and that the response is greatest over the initial 4 weeks of treatment.
Language eng
DOI 10.1079/BJN2002765
Field of Research 060602 Animal Physiology - Cell
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2003, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30008577

Document type: Journal Article
Collections: School of Biological and Chemical Sciences
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.