Incorporation of cis-9,trans-11 or trans-10,cis-12 conjugated linoleic acid into plasma and cellular lipids in healthy men

Graham C Burdge, Berit Lupoli, Jennifer J Russell, Sabine Tricon, Samantha Kew, Tapati Banerjee, Kevin J Shingfield, David E Beever, Robert F Grimble, Christine M Williams, Parveen Yaqoob, Philip C Calder

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63 Citations (SciVal)


This study investigated the incorporation of cis-9,trans-11 conjugated linoleic acid (c9,t11 CLA) and trans-10,cis-12-CLA (t10,c12 CLA) into plasma and peripheral blood mononuclear cell (PBMC) lipids when consumed as supplements highly enriched in these isomers. Healthy men (n = 49, age 31 +/- 8 years) consumed one, two, and four capsules containing approximately 600 mg of either c9,t11 CLA or t10,c12 CLA per capsule for sequential 8 week periods followed by a 6 week washout before consuming the alternative isomer. Both isomers were incorporated in a dose-dependent manner into plasma phosphatidylcholine (PC) (c9,t11 CLA r = 0.779, t10,c12 CLA r = 0.738; P <0.0001) and cholesteryl ester (CE) (c9,t11 CLA r = 0.706, t10,c12 CLA r = 0.788; P <0.0001). Only t10,c12 CLA was enriched in plasma nonesterified fatty acids. Both c9,t11 CLA and t10,c12 CLA were incorporated linearly into PBMC total lipids (r = 0.285 and r = 0.273, respectively; P <0.0005). The highest concentrations of c9,t11 CLA and t10,c12 CLA in PBMC lipids were 3- to 4-fold lower than those in plasma PC and CE. These data suggest that the level of intake is a major determinant of plasma and PBMC CLA content, although PBMCs appear to incorporate both CLA isomers less readily.
Original languageEnglish
Pages (from-to)736-41
Number of pages6
JournalJournal of Lipid Research
Issue number4
Early online date01 Feb 2004
Publication statusPublished - Apr 2004


  • Adult
  • Cholesterol Esters
  • Cross-Over Studies
  • Dietary Supplements
  • Double-Blind Method
  • Fatty Acids
  • Humans
  • Leukocytes, Mononuclear
  • Linoleic Acids
  • Linoleic Acids, Conjugated
  • Lipids
  • Male
  • Phosphatidylcholines


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