10-oxo-12(Z)-octadecenoic acid, a linoleic acid metabolite produced by gut lactic acid bacteria, potently activates PPARγ and stimulates adipogenesis

Biochem Biophys Res Commun. 2015 Apr 17;459(4):597-603. doi: 10.1016/j.bbrc.2015.02.154. Epub 2015 Mar 5.

Abstract

Our previous study has shown that gut lactic acid bacteria generate various kinds of fatty acids from polyunsaturated fatty acids such as linoleic acid (LA). In this study, we investigated the effects of LA and LA-derived fatty acids on the activation of peroxisome proliferator-activated receptors (PPARs) which regulate whole-body energy metabolism. None of the fatty acids activated PPARδ, whereas almost all activated PPARα in luciferase assays. Two fatty acids potently activated PPARγ, a master regulator of adipocyte differentiation, with 10-oxo-12(Z)-octadecenoic acid (KetoA) having the most potency. In 3T3-L1 cells, KetoA induced adipocyte differentiation via the activation of PPARγ, and increased adiponectin production and insulin-stimulated glucose uptake. These findings suggest that fatty acids, including KetoA, generated in gut by lactic acid bacteria may be involved in the regulation of host energy metabolism.

Keywords: 10-oxo-12(Z)-octadecenoic acid; Adipocyte differentiation; Fatty acid; Gut lactic acid bacteria; Obesity; PPARγ.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adipogenesis / drug effects*
  • Animals
  • Energy Metabolism
  • Lactobacillus / metabolism*
  • Linoleic Acids / biosynthesis*
  • Linoleic Acids / pharmacology
  • Mice
  • NIH 3T3 Cells
  • PPAR gamma / metabolism*
  • Polymerase Chain Reaction

Substances

  • 10-oxo-12-octadecenoic acid
  • Linoleic Acids
  • PPAR gamma