Cited by 955Liver Disease Diagnosis and TreatmentDrug-Induced Hepatotoxicity and ProtectionLiver physiology and pathology

Role of oxidative stress in the pathogenesis of nonalcoholic steatohepatitis

Rolo, Anabela P., Teodoro, João S., Palmeira, Carlos M.·2012·Free Radical Biology and Medicine

Abstract

The worldwide rising prevalence of obesity and insulin resistance is associated with a parallel increase in nonalcoholic fatty liver disease (NAFLD). NAFLD is characterized by excess accumulation of triglyceride in the hepatocyte due to increased inflow of free fatty acids and/or de novo lipogenesis caused by various drugs and multiple defects in energy metabolism. Accumulation of lipids in the hepatocyte impairs the oxidative capacity of the mitochondria, increasing the reduced state of the electron transport chain (ETC) complexes and stimulating peroxisomal and microsomal pathways of fat oxidation. The consequent increased generation of reactive oxygen species (ROS) and reactive aldehydic derivatives causes oxidative stress and cell death, via ATP, NAD, and glutathione depletion and DNA, lipid, and protein damage. Oxidative stress also triggers production of inflammatory cytokines, causing inflammation and a fibrogenic response. This ultimately results in the development of nonalcoholic steatohepatitis (NASH), which can result in end-stage liver disease. The current therapeutic strategies for NASH treatment are mostly directed toward correction of the risk factors. Stimulation of mitochondrial function may also prevent NASH development, protecting the cell against the increased flux of reduced substrates to the ETC and ROS generation.

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Crossref · 10.1016/j.freeradbiomed.2011.10.003

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Authors
Rolo, A. P., Teodoro, J. S., & Palmeira, C. M.
Affiliations
  • University of Aveiro (PT)
  • University of Coimbra (PT)
Corresponding author
Palmeira, Carlos M.
Venue
Free Radical Biology and Medicine
Publisher
Elsevier BV
Published
2012-01
Volume
52
Issue
1
Pages
59-69
ISSN
0891-5849 (ISSN-L)
OpenAlex
W2061662539
Cited by
955
References
221
Citations by year
2026: 39 · 2025: 51 · 2024: 56 · 2023: 73 · 2022: 58 · 2021: 74 · 2020: 68 · 2019: 75 · 2018: 73 · 2017: 66 · 2016: 67 · 2015: 70 · 2014: 78 · 2013: 76 · 2012: 27
FWCI
6.80
Type
journal article
Language
en
Open access
closed
Locations
  • Free Radical Biology and Medicine (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Drug-Induced Hepatotoxicity and Protection
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
nonalcoholic steatohepatitis, oxidative stress, non-alcoholic fatty liver disease, reactive oxygen species, mitochondrial dysfunction, electron transport chain, lipid accumulation, insulin resistance, obesity, inflammation, liver fibrosis, mitochondrial function, NAD+ depletion, glutathione depletion, end-stage liver disease
MeSH terms
Animals, DNA Damage, Fatty Acids, Nonesterified, Fatty Liver, Humans, Inflammation, Insulin Resistance, Mitochondria, Oxidation-Reduction, Triglycerides, Lipid Peroxidation, Cytokines, Reactive Oxygen Species, Oxidative Stress, Hepatocytes, Mice, Rats, Proteolysis, Non-alcoholic Fatty Liver Disease

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