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Red blood cell trans-18:1 isomeric profile correlates with subcutaneous fat and muscle profiles in beef cattle

Aldai, N., Dugan, M.E.R., Rolland, D.C., Aalhus, J.L. (2012). Red blood cell trans-18:1 isomeric profile correlates with subcutaneous fat and muscle profiles in beef cattle, 91(2), 203-206. http://dx.doi.org/10.1016/j.meatsci.2012.01.011

Abstract

Due to significant variation in polyunsaturated fatty acid biohydrogenation products in beef it would be useful to determine if levels of trans-18:1 isomers in samples collected ante-mortem are correlated with those collected post-mortem. Beef blood (RBC), subcutaneous fat (SC) and muscle (intramuscular fat; IM) samples were collected from an experiment with dietary vitamin E with/without flaxseed (n = 80) and fatty acids analyzed. Across treatments, correlation analysis of total and individual trans-18:1 isomers were performed between tissues. Correlations between SC and IM were highly significant for all individual and total trans-18:1. RBC trans-18:1 were also well correlated with other tissues except for vaccenic acid. Levels of 10. t-, 12. t- and 13. t/14. t- were amongst the best correlated between RBC and SC and IM profiles. Levels of 6. t/7. t/8. t-, 9. t-, and 15. t-18:1 showed significant but lower correlation factors particularly between RBC and SC. These results confirm the possibility of utilizing blood as a non-destructive sample to predict the total and isomeric profile of trans-18:1 in beef. © 2012.

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