Lipids

, Volume 31, Issue 2, pp 165–168

Identification of noveltrans isomers of 20∶5n−3 in liver lipids of rats fed a heated oil

  • Jean-Michel Chardigny
  • Jean-Louis Sébédio
  • André Grandgirard
  • Lucy Martine
  • Olivier Berdeaux
  • Jean-Michel Vatèle
Articles

DOI: 10.1007/BF02522616

Cite this article as:
Chardigny, JM., Sébédio, JL., Grandgirard, A. et al. Lipids (1996) 31: 165. doi:10.1007/BF02522616

Abstract

Trans polyunsaturated n−3 fatty acids are formed as a result of the heat treatment of vegetable oils. It was demonstrated previously that the 18∶3 Δ9cis, 12cis, 15trans containing acis Δ9 ethylenic bond was converted to a geometrical isomer of 20∶5n−3, the 20∶5 Δ5cis, 8cis, 11cis, 14cis, 17trans. In the present study, we have identified two new isomers of eicosapentaenoic acid, the Δ11 monotrans and the Δ11, 17 ditrans isomers in liver of rats fed a heated oil. These are formed as a result of the conversion of two of the main isomers of linolenic acid which are present in refined and frying oils, the 18∶3 Δ9trans, 12cis, 15cis and the 18∶3 Δ9trans, 12cis, 15trans.

Abbreviations

DMOX

dimethyl oxazoline derivatives

ECL

equivalent chain length

EPA

eicosapentaenoic acid

FAME

fatty acid methyl esters

FTIR

Fourier transform infrared

GLC

gas-liquid chromatography

PUFA

polyunsaturated fatty acids

Copyright information

© AOCS Press 1996

Authors and Affiliations

  • Jean-Michel Chardigny
    • 1
  • Jean-Louis Sébédio
    • 1
  • André Grandgirard
    • 1
  • Lucy Martine
    • 1
  • Olivier Berdeaux
    • 1
  • Jean-Michel Vatèle
    • 2
  1. 1.Unité de Nutrition LipidiqueINRADijonFrance
  2. 2.Laboratoire de Chimie Organique IESCILVilleurbanneFrance

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