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Updated: Apr 27, 2026

Optimized Analysis of In Vivo and In Vitro Hepatic Steatosis
Published on: March 11, 2017
A positive feedback loop between RIP3 and JNK controls non-alcoholic steatohepatitis
Jérémie Gautheron1, Mihael Vucur2, Florian Reisinger3
1Department of Gastroenterology, Digestive Diseases and Intensive Care Medicine (Department of Medicine III), University Hospital RWTH Aachen, Aachen, Germany Interdisciplinary Centre for Clinical Research Aachen, University Hospital RWTH Aachen, Aachen, Germany.
RIP3-dependent necroptosis drives liver fibrosis in non-alcoholic steatohepatitis (NASH). This pathway, involving JNK activation and inflammation, presents a potential therapeutic target for NASH patients.
Area of Science:
- Hepatology
- Molecular Biology
- Immunology
Background:
- Non-alcoholic fatty liver disease (NAFLD) is common and can progress to non-alcoholic steatohepatitis (NASH), fibrosis, and cancer.
- Hepatocyte apoptosis is a known step in NASH progression.
- The role of RIP3-dependent necroptosis in NASH and fibrosis is unknown.
Purpose of the Study:
- To investigate the role of RIP3-dependent necroptosis in NASH and NASH-induced liver fibrosis.
Main Methods:
- Analysis of RIP3 expression in human NASH and a dietary mouse model.
- Investigating the signaling pathway involving RIP3, Caspase-8, and JNK.
- Assessing the impact on liver injury, inflammation, progenitor cell induction, and fibrosis.
Main Results:
- RIP3 is upregulated in human NASH and a mouse model.
- RIP3 mediates liver injury, inflammation, progenitor cell induction, and fibrosis via a Caspase-8-suppressed pathway.
- RIP3 activates a positive feedback loop with JNK, promoting MCP-1 release and macrophage recruitment, exacerbating fibrosis.
Conclusions:
- RIP3-dependent necroptosis is a key driver of NASH-induced liver fibrosis.
- The RIP3/JNK pathway represents a potential therapeutic target for NASH.
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