Cited by 85Alcohol Consumption and Health EffectsLiver Disease Diagnosis and TreatmentDrug-Induced Hepatotoxicity and Protection

Cytochrome P4502E1, oxidative stress, JNK, and autophagy in acute alcohol-induced fatty liver

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Yang, Lili, Wu, Defeng, Wang, Xiaodong, Cederbaum, Arthur I.·2012·Free Radical Biology and Medicine

Abstract

Binge alcohol drinking induces hepatic steatosis. Recent studies showed that chronic ethanol-induced fatty liver was, at least in part, CYP2E1 dependent. The mechanism of acute alcohol-induced steatosis and whether CYP2E1 plays any role are still unclear. Increasing oxidative stress by alcohol can activate the JNK MAP kinase signaling pathway, suggesting that JNK might be a target for prevention of alcohol-induced steatosis. We used CYP2E1 knockout (KO) mice, a JNK inhibitor, and JNK1 or JNK2 knockout mice to test the role of CYP2E1, JNK, and the individual role of JNK1 and JNK2 in acute alcohol-induced steatosis. In wild-type (WT) mice, acute alcohol activates CYP2E1 and increases oxidative stress, which reciprocally increases activation of the JNK signaling pathway. Acute alcohol-induced fatty liver and oxidative stress were blunted in CYP2E1 KO mice and by the JNK inhibitor in WT mice. The antioxidant N-acetylcysteine decreased the acute alcohol-induced oxidative stress, the activation of JNK, and the steatosis but not the activation of CYP2E1. Acute alcohol decreased autophagy and increased expression of SREBP, effects blocked by the JNK inhibitor. Acute alcohol-induced fatty liver was the same in JNK1 and JNK2 KO mice as in WT mice; thus either JNK1 or JNK2 per se is sufficient for induction of steatosis by acute alcohol. The results show that acute alcohol elevation of CYP2E1, oxidative stress, and activation of JNK interact to lower autophagy and increase lipogenic SREBP resulting in fatty liver.

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Crossref · 10.1016/j.freeradbiomed.2012.06.029

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  1. [42]Liu J Minemoto Y Lin A c-Jun N-terminal protein kinase 1 (JNK1), but not JNK2, is essential for tumor necrosis factor alpha-induced c-Jun kinase activation and apoptosis Mol Cell Biol 2004 24 10844 10856 15572687 PMC533995

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Authors
Yang, L., Wu, D., Wang, X., & Cederbaum, A. I.
Affiliations
Icahn School of Medicine at Mount Sinai (US)
Corresponding author
Cederbaum, Arthur I.
Venue
Free Radical Biology and Medicine
Publisher
Elsevier BV
Published
2012-09
Volume
53
Issue
5
Pages
1170-1180
ISSN
0891-5849 (ISSN-L)
OpenAlex
W1995917437
Cited by
85
References
50
Citations by year
2026: 1 · 2025: 3 · 2024: 4 · 2023: 9 · 2022: 2 · 2021: 6 · 2020: 4 · 2019: 9 · 2018: 6 · 2017: 5 · 2016: 5 · 2015: 9 · 2014: 12 · 2013: 9 · 2012: 1
FWCI
7.14
Type
journal article
Language
en
Open access
Locations
  • Free Radical Biology and Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • USPHS (AA017425)
  • The National Institute on Alcohol Abuse and Alcoholism (AA 018790)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Alcohol Consumption and Health Effects
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Drug-Induced Hepatotoxicity and Protection
Keywords
hepatic steatosis, CYP2E1, oxidative stress, JNK1, JNK2, autophagy, SREBP, N-acetylcysteine, binge drinking
MeSH terms
Ethanol, Animals, Autophagy, Fatty Liver, Alcoholic, Male, Mice, Inbred C57BL, Mice, Knockout, Oxidative Stress, Cytochrome P-450 CYP2E1, Mitogen-Activated Protein Kinase 8, Mitogen-Activated Protein Kinase 9, Mice, Mice, 129 Strain

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