Details

Autor(en) / Beteiligte

• Iannucci, Liliana F.
• Sun, Jingfeng
• Singh, Brijesh K.
• Zhou, Jin
• Kaddai, Vincent A.
• Lanni, Antonia
• Yen, Paul M.
• Sinha, Rohit A.

Titel

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

Ist Teil von

• Biochemical and biophysical research communications, 2016-11, Vol.480 (3), p.461-467

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2016

Quelle

MEDLINE

Beschreibungen/Notizen

• 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. [Display omitted] •SCFAs (Propionate and Butyrate) induce hepatic autophagy.•SCFAs induced autophagy is UCP2 dependent.•Loss of gut microbiome impairs basal liver autophagy.