Vaccenic acid and cis-9 -11 CLA in the rumen and different tissues of pasture- and concentrate-feed beef cattle

Authors Organisations
  • Xiangzhen Shen(Author)
    Nanjing Agricultural University
  • Karin Nuernberg(Author)
    Research Institute for Biology of Farm Animals, Germany
  • Gerd Nuernberg(Author)
    Research Institute for Biology of Farm Animals, Germany
  • Ruqian Zhao(Author)
    Nanjing Agricultural University
  • Nigel Scollan(Author)
  • Klaus Ender(Author)
    Research Institute for Biology of Farm Animals, Germany
  • Dirk Dannenberger(Author)
    Research Institute for Biology of Farm Animals, Germany
Type Article
Original languageEnglish
Pages (from-to)1093-1103
Number of pages11
JournalLipids
Volume42
Issue number12
Early online date03 Oct 2007
DOI
Publication statusPublished - 01 Dec 2007
Links
Permanent link
View graph of relations
Citation formats

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.

Keywords

  • CLA, vaccenic acid, beef, pasture, rumen, digesta, blood, muscle