Abstract
The objective of present study was the comparison of trans-11 18:1 (VA) and cis-9,trans-11 CLA concentrations in the rumen and different tissues in beef cattle, and to examine the diet and breed effects on the compound concentration and deposition. Sixty-four German Holstein and German Simmental bulls were randomly assigned to two dietary treatments, based on concentrate or pasture. The concentration of cis-9,trans-11 CLA and VA in rumen, duodenal digesta and different tissues was determined by gas chromatography. The results showed that pasture relative to concentrate feeding significantly increased the concentration of VA in duodenal digesta, plasma and erythrocyte phospholipids. Pasture-based feeding resulted in a significant enrichment of cis-9,trans-11 CLA in plasma lipids and erythrocyte phospholipids, but not in rumen and duodenal digesta, compared to concentrate-fed diet. Diet did not affect the cis-9,trans-11 CLA concentrations (mg/100 g fresh tissue) in semitendinosus muscle and subcutaneous fat. There was a breed effect on the deposition of cis-9,trans-11 CLA in longissimus muscle with lower concentration in pasture-fed German Simmental bulls compared to concentrate-fed bulls. However, pasture feeding significantly increased both, the VA and cis-9,trans-11 CLA concentrations in liver and heart tissues. Both diet and breed effects on Δ9-desaturase index was observed in muscle and subcutaneous fat tissues. There was a linear relationship between the concentration of VA and cis-9,trans-11 CLA and the coefficients of determination (R 2) varied between 0.29 and 0.87 from rumen to the different tissues.
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Abbreviations
- CLA:
-
Conjugated linoleic acids
- DM:
-
Dry matter
- FAME:
-
Fatty acid methyl esters
- GH:
-
German Holstein
- GC:
-
Gas chromatography
- GS:
-
German Simmental
- LSM:
-
Least square mean
- ME:
-
Methyl ester
- PL:
-
Phospholipids
- SEM:
-
Standard error of LSM
- PUFA:
-
Polyunsaturated fatty acids
- VA:
-
Vaccenic acid
- vol:
-
Volume
- wt:
-
Weight
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Acknowledgments
We thank B. Jentz and H. Rooch of the Department of Muscle Biology and Growth, who conducted the sample preparation and GC measurements. Funding: The research was supported by grants from the European Commission (Research Project QLRT-CT-2000-31423), the Agricultural Ministry of China (Grant No. 26/2005–2006 “Adipogenesis”) and the National Natural Science Foundation of China (Project No. 30371040).
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Shen, X., Nuernberg, K., Nuernberg, G. et al. Vaccenic Acid and cis-9,trans-11 CLA in the Rumen and Different Tissues of Pasture- and Concentrate-Fed Beef Cattle. Lipids 42, 1093–1103 (2007). https://doi.org/10.1007/s11745-007-3115-8
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DOI: https://doi.org/10.1007/s11745-007-3115-8