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An Advanced Murine Model for Nonalcoholic Steatohepatitis in Association with Type 2 Diabetes
Published on: April 26, 2019
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Multiple omics study identifies an interspecies conserved driver for nonalcoholic steatohepatitis
Xiao-Jing Zhang1,2,3, Zhi-Gang She1,2, Junyong Wang1,2
1Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.
Science Translational Medicine
|December 15, 2021
Summary
Lipotoxicity accelerates nonalcoholic steatohepatitis (NASH). Researchers identified arachidonate 12-lipoxygenase (ALOX12) as a key driver, exacerbating NASH by targeting acetyl-CoA carboxylase 1 (ACC1) for degradation.
Area of Science:
- Hepatology
- Molecular Biology
- Biochemistry
Background:
- Lipotoxicity is a known factor in nonalcoholic steatohepatitis (NASH) development and progression.
- The precise molecular mechanisms underlying lipotoxicity-induced NASH are not fully understood.
Purpose of the Study:
- To investigate the hepatic transcriptomic changes associated with lipotoxic insults.
- To identify conserved molecular pathways and key genes involved in NASH pathogenesis across species.
Main Methods:
- Systematic mapping of hepatic transcriptomic landscapes in response to lipotoxic insults.
- Comparative analysis across human, macaque, swine, and mouse NASH models.
- Gain- and loss-of-function studies in mouse and Bama pig models.
- Investigation of the interaction between ALOX12 and acetyl-CoA carboxylase 1 (ACC1).
Main Results:
- A conserved activation of the arachidonic acid pathway, specifically the arachidonate 12-lipoxygenase (ALOX12) gene, strongly correlated with NASH severity.
- ALOX12 significantly worsened NASH in mouse and Bama pig models.
- ALOX12 was found to induce NASH by promoting lysosomal degradation of acetyl-CoA carboxylase 1 (ACC1).
Conclusions:
- ALOX12 is a critical molecular driver of NASH pathogenesis.
- The interaction between ALOX12 and ACC1 represents a potential therapeutic target for NASH treatment.
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