Short chain fatty acids induce UCP2-mediated autophagy in hepatic cells.

Published

Journal Article

Short-chain fatty acids (SCFAs) are gut microbial fermentation products derived from dietary fiber sources. Although depletion of gut microflora has been linked to the development of liver disease, the direct effects of SCFAs on intracellular hepatic processes are not well understood. In this study, we demonstrated that the SCFAs, propionate and butyrate, regulated autophagic flux in hepatic cells in a cell-autonomous manner. Induction of autophagy by SCFAs required PPARγ stimulation of Uncoupling Protein 2 (UCP2) expression that was associated with reduced intracellular ATP levels and activation of PRKAA1/AMPK (protein kinase, AMP-activated, alpha 1 catalytic subunit). In addition, elimination of gut flora by chronic antibiotic treatment diminished basal hepatic autophagy in mice suggesting that gut microbiota can regulate hepatic autophagy. These findings provide novel insights into the interplay between diet, gut microbiota, short chain fatty acids, and hepatic autophagic signaling.

Full Text

Duke Authors

Cited Authors

  • Iannucci, LF; Sun, J; Singh, BK; Zhou, J; Kaddai, VA; Lanni, A; Yen, PM; Sinha, RA

Published Date

  • November 18, 2016

Published In

Volume / Issue

  • 480 / 3

Start / End Page

  • 461 - 467

PubMed ID

  • 27773823

Pubmed Central ID

  • 27773823

Electronic International Standard Serial Number (EISSN)

  • 1090-2104

Digital Object Identifier (DOI)

  • 10.1016/j.bbrc.2016.10.072

Language

  • eng

Conference Location

  • United States