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Duodenal flow of C18:1 and conjugated linoleic acid isomers in beef steers fed high sugar grass, red clover or grass/red clover mix silages

Published online by Cambridge University Press:  20 November 2017

M.R.F. Lee ,
J.K.S. Tweed ,
P. L. Connelly ,
R.J. Merry ,
R.J. Dewhurst  and
N. D. Scollan
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Extract

Biohydrogenation of polyunsaturated fatty acids (PUFA) such as C18:2n-6 and C18:3n-3 results in the formation of C18:0 and numerous intermediary products such as the C18:1 cis and trans isomers and conjugated and non-conjugated C18:2 cis and trans isomers. Interest in these isomers has grown with the identification of biologically active isomers of conjugated linoleic acid (CLA cis 9 trans 11 and CLA trans 10 cis 12) and enzymatic pathways for CLA cis 9 trans 11 formation from C18:1 trans 11, both in the mammary gland and muscle. This abstract reports on the duodenal flow of biohydrogenation intermediates, with the objective of explaining the reduced biohydrogenation with red clover silage (Lee et al. 2004).

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2004 , 2004 , pp. 67
Copyright
Copyright © The British Society of Animal Science 2004

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References

Beaulieu, AD, Drackley, JK, Merchen, NR. 2002. Concentrations of conjugated linoleic acid are not increased in tissue lipids of cattle fed a high-concentrate diet supplemented with soybean oil. J. Ani. Sci. 80: 847–861.CrossRefGoogle Scholar
Kramer, JKG, Zhou, J. 2001. Conjugated linoleic acid and octadecenoic acids: Extraction and isolation of lipids. Eur. J. Lipid Sci. Technol. 103: 600–609.Google Scholar
Lee, MRF, Tweed, JKS, Connelly, PL, Merry, RJ, Dewhurst, RJ, Scollan, ND. 2004. Duodenal flow and biohydrogenation of C18 polyunsaturated fatty acids in beef steers fed high sugar grass, red clover or grass/red clover mix silages. Pro. Bri. Soc. Ani. Sci. (In this meeting).Google Scholar