Krüppel-like factor 6 is a transcriptional activator of autophagy in acute liver injury.

Abstract:

:Krüppel-like factor 6 (KLF6) is a transcription factor and tumor suppressor. We previously identified KLF6 as mediator of hepatocyte glucose and lipid homeostasis. The loss or reduction of KLF6 is linked to the progression of hepatocellular carcinoma, but its contribution to liver regeneration and repair in acute liver injury are lacking so far. Here we explore the role of KLF6 in acute liver injury models in mice, and in patients with acute liver failure (ALF). KLF6 was induced in hepatocytes in ALF, and in both acetaminophen (APAP)- and carbon tetrachloride (CCl4)-treated mice. In mice with hepatocyte-specific Klf6 knockout (DeltaKlf6), cell proliferation following partial hepatectomy (PHx) was increased compared to controls. Interestingly, key autophagic markers and mediators LC3-II, Atg7 and Beclin1 were reduced in DeltaKlf6 mice livers. Using luciferase assay and ChIP, KLF6 was established as a direct transcriptional activator of ATG7 and BECLIN1, but was dependent on the presence of p53. Here we show, that KLF6 expression is induced in ALF and in the regenerating liver, where it activates autophagy by transcriptional induction of ATG7 and BECLIN1 in a p53-dependent manner. These findings couple the activity of an important growth inhibitor in liver to the induction of autophagy in hepatocytes.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Sydor S,Manka P,Best J,Jafoui S,Sowa JP,Zoubek ME,Hernandez-Gea V,Cubero FJ,Kälsch J,Vetter D,Fiel MI,Hoshida Y,Bian CB,Nelson LJ,Moshage H,Faber KN,Paul A,Baba HA,Gerken G,Friedman SL,Canbay A,Bechmann LP

doi

10.1038/s41598-017-08680-w

subject

Has Abstract

pub_date

2017-08-14 00:00:00

pages

8119

issue

1

issn

2045-2322

pii

10.1038/s41598-017-08680-w

journal_volume

7

pub_type

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