Conjugated Linoleic Acid (CLA) Production in the Rumen -Roles of Butyrivibrio fibrisolvens A38

  • Kim, Dae-Ok (Department of Food Science and Technology, Cornell University) ;
  • Kim, Tae-Wan (Department of Food Science and Technology, Cornell University) ;
  • Heo, Ho-Jin (Department of Food Science and Technology, Cornell University) ;
  • Imm, Jee-Young (Department of Food and Nutrition, Kookmin University) ;
  • Hwang, Han-Joon (Department of Food and Biotechnology, Korea University) ;
  • Oh, Sejong (Department of Applied Animal Science, Chonnam University) ;
  • Kim, Young-Jun (Department of Food and Biotechnology, Korea University)
  • Published : 2004.09.01


Conjugated linoleic acid (CLA) is currently under intensive investigation due to its health benefits. A great deal of interest has been paid to the possible health-promoting roles of CLA, but there are not many studies available on the mechanism of CLA production by ruminal microorganisms. CLA is produced as an intermediate of the characteristic biohydrogenation process of linoleic acid(LA) in the rumen and its production has direct relationship to numerous environmental factors including particle association, substrate concentration, forage-to-grain ratio, pH, ionopore, bacterial cell density, etc. Some of these factors were known to affect hydrogenating activities of Butyrivibrio fibrisolvens A38 which is an active rumen bacterium in CLA production. Dairy cow is a main source of CLA, and its level could be increased by dietary manipulation changing the physiological environment of rumen bacteria such as B. fibrisolvens A38. Therefore, the effects of various factors on. ruminal biohydrogenation should be carefully considered to optimize not only CLA production, but also other fatty acid metabolism, both of which are directly affecting nutritional quality and functionality of dairy products. In this review, the relationship between various environmental factors and ruminal CLA production is discussed focusing on the CLA production of B. fibrisolvens A38.



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