Cited by 24Alcohol Consumption and Health EffectsAntioxidant Activity and Oxidative StressRedox biology and oxidative stress

Generation of Aldehyde‐Derived Protein Modifications in Ethanol‐Exposed Heart

Niemelä, Onni, Parkkila, Seppo, Worrall, Simon, Emery, Peter W., Preedy, Victor R.·2003·Alcoholism: Clinical and Experimental Research

Abstract

Background: Although excessive ethanol consumption is known to lead to a variety of adverse effects in the heart, the molecular mechanisms of such effects have remained poorly defined. We hypothesized that posttranslational covalent binding of reactive molecular species to proteins occurs in the heart in response to acute ethanol exposure. Methods: The generation of protein adducts with several aldehydic species was examined by using monospecific antibodies against adducts with malondialdehyde (MDA), acetaldehyde (AA), MDA‐AA hybrids, and hydroxyethyl radicals. Specimens of heart tissue were obtained from rats after intraperitoneal injections with alcohol (75 mmol/kg body weight) with or without pretreatment with cyanamide (0.05 mmol/kg body weight), an aldehyde dehydrogenase inhibitor. Results: The amounts of MDA and unreduced AA adducts were found to be significantly increased in the heart of the rats treated with ethanol, cyanamide, or both, whereas no other adducts were detected in statistically significant quantities. Immunohistochemical studies for characterization of adduct distribution revealed sarcolemmal adducts of both MDA and AA in the rats treated with ethanol and cyanamide in addition to intracellular adducts, which were also present in the group treated with ethanol alone. Conclusions: These findings support the role of enhanced lipid peroxidation and the generation of protein‐aldehyde condensates in vivo as a result of excessive ethanol intake. These findings may have implications in the molecular mechanisms of cardiac dysfunction in alcoholics.

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Crossref · 10.1097/01.alc.0000099260.58926.f2

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Authors
Niemelä, O., Parkkila, S., Worrall, S., Emery, P. W., & Preedy, V. R.
Affiliations
The University of Queensland (AU)
Corresponding author
Niemelä, Onni
Venue
Alcoholism: Clinical and Experimental Research
Publisher
Wiley
Published
2003-12
Volume
27
Issue
12
Pages
1987-1992
ISSN
  • 0145-6008 (ISSN-L)
  • 1530-0277
OpenAlex
W2009972815
Cited by
24
References
61
Citations by year
2024: 1 · 2021: 1 · 2016: 1 · 2015: 2 · 2014: 1 · 2013: 2 · 2012: 1
FWCI
1.97
Type
journal article
Language
en
Open access
closed
Locations
  • Alcoholism Clinical and Experimental Research (publishedVersion)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (submittedVersion)
Funders
University of Nebraska Medical Center
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Alcohol Consumption and Health Effects
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
ethanol, heart, malondialdehyde, acetaldehyde, protein adducts, lipid peroxidation, aldehyde dehydrogenase inhibition, cyanamide, sarcolemma, post-translational modification
MeSH terms
Ethanol, Aldehydes, Animals, Male, Myocardium, Rabbits, Rats, Wistar, Rats

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