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Lookup NU author(s): Professor Helen ReevesORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Non-alcoholic fatty liver disease (NAFLD) represents the most common liver disease in Western countries and often progresses to non-alcoholic steatohepatitis (NASH) leading ultimately to liver fibrosis and liver cancer. The occurrence of hepatocyte cell deathso far characterized as hepatocyte apoptosisrepresents a fundamental step from benign steatosis toward progressive steatohepatitis. In contrast, the function of RIP3-dependent necroptosis in NASH and NASH-induced fibrosis is currently unknown. We show that RIP3 is upregulated in human NASH and in a dietary mouse model of steatohepatitis. RIP3 mediates liver injury, inflammation, induction of hepatic progenitor cells/activated cholangiocytes, and liver fibrosis through a pathway suppressed by Caspase-8. This function of RIP3 is mediated by a positive feedback loop involving activation of Jun-(N)-terminal Kinase (JNK). Furthermore, RIP3-dependent JNK activation promotes the release of pro-inflammatory mediators like MCP-1, thereby attracting macrophages to the injured liver and further augmenting RIP3-dependent signaling, cell death, and liver fibrosis. Thus, RIP3-dependent necroptosis controls NASH-induced liver fibrosis. This pathway might represent a novel and specific target for pharmacological strategies in patients with NASH.
Author(s): Gautheron J, Vucur M, Reisinger F, Cardenas DV, Roderburg C, Koppe C, Kreggenwinkel K, Schneider AT, Bartneck M, Neumann UP, Canbay A, Reeves HL, Luedde M, Tacke F, Trautwein C, Heikenwalder M, Luedde T
Publication type: Article
Publication status: Published
Journal: EMBO Molecular Medicine
Print publication date: 01/08/2014
Online publication date: 24/06/2014
Acceptance date: 22/05/2014
Date deposited: 02/10/2014
ISSN (print): 1757-4676
ISSN (electronic): 1757-4684
Publisher: Wiley-Blackwell Publishing Ltd.
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