Polyunsaturated fatty acid saturation by gut lactic acid bacteria affecting host lipid composition

Shigenobu Kishino, Michiki Takeuchi, Si Bum Park, Akiko Hirata, Nahoko Kitamura, Jun Kunisawa, Hiroshi Kiyono, Ryo Iwamoto, Yosuke Isobe, Makoto Arita, Hiroyuki Arai, Kazumitsu Ueda, Jun Shima, Satomi Takahashi, Kenzo Yokozeki, Sakayu Shimizu, Jun Ogawa

Research output: Contribution to journalArticlepeer-review

273 Citations (Scopus)


In the representative gut bacterium Lactobacillus plantarum, we identified genes encoding the enzymes involved in a saturation metabolism of polyunsaturated fatty acids and revealed in detail the metabolic pathway that generates hydroxy fatty acids, oxo fatty acids, conjugated fatty acids, and partially saturated transfatty acids as intermediates. Furthermore, we observed these intermediates, especially hydroxy fatty acids, in host organs. Levels of hydroxy fatty acids were much higher in specific pathogen-free mice than in germ-free mice, indicating that these fatty acids are generated through polyunsaturated fatty acids metabolism of gastrointestinal microorganisms. These findings suggested that lipid metabolism by gastrointestinal microbes affects the health of the host by modifying fatty acid composition.

Original languageEnglish
Pages (from-to)17808-17813
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number44
Publication statusPublished - 2013 Oct 29
Externally publishedYes

ASJC Scopus subject areas

  • General


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