Author:
Newbold J.R.,Robertshaw K.L.,Morris H.W.
Abstract
Rumen bacteria convert polyunsaturated C18 fatty acids to stearic acid (CI8:0) by biohydrogenation. Intermediates include a family of cis/trans isomers of linoleic acid known as conjugated linoleic acid (CLA) and a family of trans isomers of oleic acid (C18:1), chiefly trans-11 C18:1. Trans fatty acids inhibit milk fat synthesis in cows, an effect which Griinari et al. (1997) attributed specifically to trans-10 C18:1. Biohydrogenation intermediates can be incorporated directly into milk. In humans, trans C18:1 in hydrogenated vegetable oil (chiefly trans-9 C18:1) mimic saturated fatty acids as a risk factor for heart disease (Judd et al., 1994) and may inhibit milk fat synthesis. CLA may be anticarcinogenic (Parodi, 1997). It is important, therefore, to understand the effect of dairy cow nutrition on biohydrogenation intermediates.
Publisher
Cambridge University Press (CUP)
Reference3 articles.
1. Trans-10 isomer of octadecenoic acid corresponds with milk fat depression;Griinari;Journal of Dairy Science,1997
2. Dietary trans fatty acids: effects on plasma lipids and lipoproteins of healthy men and women;Judd;American Journal of Clinical Nutrition,1994
3. Cow's milk fat components as potential anticarcinogenic agents;Parodi;Journal of Nutrition,1997
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