Cited by 555Drug-Induced Hepatotoxicity and ProtectionPharmacogenetics and Drug MetabolismBioactive Compounds and Antitumor Agents

Role of cytochromes P450 in chemical toxicity and oxidative stress: studies with CYP2E1

Gonzalez, Frank J.·2005·Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis

Abstract

Cytochromes P450 are responsible for metabolism of most xenobiotics and are required for the efficient elimination of foreign chemicals from the body. Paradoxically, these enzymes also metabolically activate biologically inert compounds to electrophilic derivatives that can cause toxicity, cell death and sometimes cellular transformation resulting in cancer. To establish the role of these enzymes in toxicity and carcinogenicity in vivo, gene knockout mice have been developed. To illustrate the role of P450s in toxicity, CYP2E1-null mice were employed with the commonly used analgesic drug acetaminophen. CYP2E1 is the rate-limiting enzyme that initiates the cascade of events leading to acetaminophen hepatotoxicity; in the absence of this P450, toxicity will only be apparent at high concentrations. Other enzymes and nuclear receptors are also involved in activation or inactivating chemicals. CYP2E1 is induced by alcohol and the primary P450 that carries out ethanol oxidation that can lead to the production of activated oxygen species and oxidative stress that elevate ERK1/2 phosphorylation through EGRF/c-Raf signaling. Paradoxically, activation of this pathway inhibits apoptotic cell death stimulated by reactive oxygen generating chemicals but accelerates necrotic cell death produced by polyunsaturated fatty acids. CYP2E1 is thought to contribute to liver pathologies that result from alcoholic liver disease and non-alcoholic steatohepatitis.

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Crossref · 10.1016/j.mrfmmm.2004.04.021

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  • In chronic pancreatitis, metabolism of alcohol leads to production of reactive oxygen species and fatty acid ethyl esters that activate stellate cells and damage acinar cells of the pancreas.

    “Specifically, in chronic pancreatitis, metabolism of alcohol leads to production of reactive oxygen species 304 and fatty acid ethyl esters 305, 306 that activate stellate cells and damage acinar cells of the pancreas.”

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Authors
Gonzalez, F. J.
Affiliations
National Institutes of Health (US)
Corresponding author
Gonzalez, Frank J.
Venue
Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis
Publisher
Elsevier BV
Published
2005-01
Volume
569
Issue
1-2
Pages
101-110
ISSN
  • 0027-5107 (ISSN-L)
  • 1386-1964
OpenAlex
W1967251260
Cited by
555
References
72
Citations by year
2026: 3 · 2025: 16 · 2024: 19 · 2023: 19 · 2022: 32 · 2021: 29 · 2020: 17 · 2019: 26 · 2018: 34 · 2017: 35 · 2016: 28 · 2015: 23 · 2014: 37 · 2013: 34 · 2012: 24
FWCI
2.78
Type
journal article
Language
en
Open access
closed
Locations
  • Mutation research. Fundamental and molecular mechanisms of mutagenesis (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Drug-Induced Hepatotoxicity and Protection
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Bioactive Compounds and Antitumor Agents
Keywords
cytochrome P450, CYP2E1, acetaminophen hepatotoxicity, xenobiotic metabolism, metabolic activation, oxidative stress, knockout mice, alcoholic liver disease, nonalcoholic steatohepatitis, ERK1/2 phosphorylation, EGF receptor signaling, reactive oxygen species, necrosis, apoptosis, carcinogenesis
MeSH terms
Acetaminophen, Animals, Humans, Inactivation, Metabolic, Xenobiotics, Apoptosis, Reactive Oxygen Species, Oxidative Stress, Cytochrome P-450 CYP2E1, Chemical and Drug Induced Liver Injury, Drug-Related Side Effects and Adverse Reactions

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