Cellular senescence drives age-dependent hepatic steatosis.

Abstract:

:The incidence of non-alcoholic fatty liver disease (NAFLD) increases with age. Cellular senescence refers to a state of irreversible cell-cycle arrest combined with the secretion of proinflammatory cytokines and mitochondrial dysfunction. Senescent cells contribute to age-related tissue degeneration. Here we show that the accumulation of senescent cells promotes hepatic fat accumulation and steatosis. We report a close correlation between hepatic fat accumulation and markers of hepatocyte senescence. The elimination of senescent cells by suicide gene-meditated ablation of p16Ink4a-expressing senescent cells in INK-ATTAC mice or by treatment with a combination of the senolytic drugs dasatinib and quercetin (D+Q) reduces overall hepatic steatosis. Conversely, inducing hepatocyte senescence promotes fat accumulation in vitro and in vivo. Mechanistically, we show that mitochondria in senescent cells lose the ability to metabolize fatty acids efficiently. Our study demonstrates that cellular senescence drives hepatic steatosis and elimination of senescent cells may be a novel therapeutic strategy to reduce steatosis.

journal_name

Nat Commun

journal_title

Nature communications

authors

Ogrodnik M,Miwa S,Tchkonia T,Tiniakos D,Wilson CL,Lahat A,Day CP,Burt A,Palmer A,Anstee QM,Grellscheid SN,Hoeijmakers JHJ,Barnhoorn S,Mann DA,Bird TG,Vermeij WP,Kirkland JL,Passos JF,von Zglinicki T,Jurk D

doi

10.1038/ncomms15691

subject

Has Abstract

pub_date

2017-06-13 00:00:00

pages

15691

issn

2041-1723

pii

ncomms15691

journal_volume

8

pub_type

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