Cited by 246Alcohol Consumption and Health EffectsAntioxidant Activity and Oxidative StressProtein Interaction Studies and Fluorescence Analysis

Acetaldehyde and malondialdehyde react together to generate distinct protein adducts in the liver during long-term ethanol administration

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Tuma, D J, Thiele, G M, Xu, D, Klassen, L W, Sorrell, M F·1996·Hepatology

Abstract

Acetaldehyde and the lipid peroxidation-derived aldehyde malondialdehyde (MDA), are reactive compounds that are generated during ethanol metabolism in the liver, and both aldehydes have been shown to be capable of binding to proteins and forming stable adducts. Because similar concentrations of MDA and acetaldehyde can coexist in the liver during ethanol oxidation, protein adduct formation in the presence of both of these aldehydes was studied under both in vitro and in vivo conditions. When proteins were incubated in the presence of both MDA and acetaldehyde, MDA caused a marked and concentration-dependent increase in the stable binding of acetaldehyde to proteins. Maximum stimulation of binding occurred at approximately a fourfold molar excess of MDA relative to acetaldehyde when concentrations of 1.0 mmol/L and 0.1 mmol/L were tested. The formation of highly fluorescent product or products was associated with the MDA stimulation of acetaldehyde binding, indicating that new and distinct products were being generated. These hybrid adducts of MDA and acetaldehyde have been designated as MAA adducts. An affinity-purified polyclonal antibody was produced that specifically recognized MAA epitopes on proteins and did not cross-react with carrier proteins or proteins modified with either acetaldehyde or MDA alone. A quantitative competitive enzyme-linked immunosorbent assay (ELISA) was developed and detected the presence of MAA-modified proteins in liver cytosol from ethanol-fed rats but not in pair-fed controls. Quantification of the data from the competitive ELISA indicated the presence of approximately 75 pmoles protein-bound MAA per milligram liver cytosol proteins of the ethanol-fed animals. These results indicate that acetaldehyde and MDA can react together in a synergistic manner and generate hybrid adducts (MAA-adducts) and further suggest that MAA adducts may represent a major species of adducts formed in the liver during ethanol metabolism in vivo .

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Crossref · 10.1002/hep.510230431

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  • Interactions between acetaldehyde or MDA and cellular proteins lead to formation of MAA adducts, which are highly stable and resistant to rapid degradation; increased MAA adducts from alcohol exposure stimulate protein dysfunction and immune-induced tissue injury through interactions with TLR-3, TLR-6, calpain, collagen alpha-1 (XII) chain, procollagen type XIV alpha-1, protocadherin beta, or补体成分.

    “Interactions between acetaldehyde or MDA and cellular proteins lead to the formation of MAA adducts, which are highly stable and resistant to rapid degradation178,179.”

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Authors
Tuma, D. J., Thiele, G. M., Xu, D., Klassen, L. W., & Sorrell, M. F.
Affiliations
United States Department of Veterans Affairs (US)
Venue
Hepatology
Published
1996-04
Volume
23
Issue
4
Pages
872-880
ISSN
0270-9139 (ISSN-L)
OpenAlex
W2021937351
Cited by
245
References
0
Citations by year
2026: 5 · 2025: 4 · 2024: 5 · 2023: 7 · 2022: 12 · 2021: 6 · 2020: 7 · 2019: 2 · 2018: 8 · 2017: 7 · 2016: 6 · 2015: 7 · 2014: 10 · 2013: 18 · 2012: 8
FWCI
4.18
Type
journal article
Language
en
Open access
Locations
  • Hepatology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01aa004961-18)
  • National Institute on Alcohol Abuse and Alcoholism (AA-04961, AA07818)
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 › Protein Interaction Studies and Fluorescence Analysis
Keywords
acetaldehyde, malondialdehyde, protein adducts, alcohol metabolism, liver, lipid peroxidation, polyclonal antibodies, competitive ELISA, liver cytosol
MeSH terms
Acetaldehyde, Ethanol, Animals, Enzyme-Linked Immunosorbent Assay, Liver, Male, Malondialdehyde, Protein Binding, Rabbits, Serum Albumin, Bovine, Rats, Wistar, Rats

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