Conjugated linoleic acid and conjugated linolenic acid production in bifidobacteria

Lara Gorissen, Katleen Raes, Frédéric Leroy, Luc De Vuyst, Stefaan De Smet

Research output: Chapter in Book/Report/Conference proceedingConference paper

1 Citation (Scopus)


There is great interest in conjugated linoleic acid (CLA) and conjugated linolenic acid (CLNA) isomers because of their supposed health-promoting properties. Therefore, the differences in production kinetics of CLA and CLNA isomers from linoleic acid (LA) and α-linolenic acid (α-LNA), respectively, by bifidobacteria were investigated. Laboratory fermentations, supplemented with LA or α-LNA in the fermentation medium, were performed with Bifidobacterium bifidum LMG10645, Bifidobacterium breve LMG 11040,B. breve LMG 11084, B. breve
LMG 11613, B. breve LMG 13194, and Bifidobacterium pseudolongum subsp.
pseudolongum LMG 11595. Conversion of LA and α-LNA to CLA and CLNA isomers, respectively, started immediately upon addition of the substrate fatty acids. During the active growth phase, the c9, t11-CLA isomer and the putative
c9, t11, c15-CLNA isomer were formed. Further fermentation resulted in a reduction in the concentration of c9, t11-CLA and c9, t11, c15-CLNA and the subsequent production of the t9, t11-CLA isomer and the putative t9, t11, c15-CLNA isomer, respectively. Modelling of the growth and metabolite data indicated differences in production kinetics among the strains. Some strains displayed a high specific conversion of LA and α-LNA despite poor growth, whereas other strains grew well but displayed lower conversion. Production of specific CLA and CLNA isomers by bifidobacteria holds potential for the production of functional foods and could contribute to their probiotic properties.
© 2012 Elsevier B.V
Original languageEnglish
Title of host publicationCommunications in agricultural and applied biological sciences
Publication statusPublished - 23 Feb 2012


  • Bifidobacteria
  • Conjugated linoleic acid
  • Conjugated linolenic acid
  • Fermentation
  • Kinetics


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