Cited by 55Cardiac Ischemia and ReperfusionMitochondrial Function and PathologyNeurological Disorders and Treatments

Nitroalkenes Confer Acute Cardioprotection via Adenine Nucleotide Translocase 1

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Nadtochiy, Sergiy M., Zhu, Qiuyu, Urciuoli, William, Rafikov, Ruslan, Black, Stephen M., Brookes, Paul S.·2012·Journal of Biological Chemistry

Abstract

Electrophilic nitrated lipids (nitroalkenes) are emerging as an important class of protective cardiovascular signaling molecules. Although species such as nitro-linoleate (LNO(2)) and nitro-oleate can confer acute protection against cardiac ischemic injury, their mechanism of action is unclear. Mild uncoupling of mitochondria is known to be cardioprotective, and adenine nucleotide translocase 1 (ANT1) is a key mediator of mitochondrial uncoupling. ANT1 also contains redox-sensitive cysteines that may be targets for modification by nitroalkenes. Therefore, in this study we tested the hypothesis that nitroalkenes directly modify ANT1 and that nitroalkene-mediated cardioprotection requires ANT1. Using biotin-tagged LNO(2) infused into intact perfused hearts, we obtained mass spectrometric (MALDI-TOF-TOF) evidence for direct modification (nitroalkylation) of ANT1 on cysteine 57. Furthermore, in a cell model of ischemia-reperfusion injury, siRNA knockdown of ANT1 inhibited the cardioprotective effect of LNO(2). Although the molecular mechanism linking ANT1-Cys(57) nitroalkylation and uncoupling is not yet known, these data suggest that ANT1-mediated uncoupling may be a mechanism for nitroalkene-induced cardioprotection.

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Authors
Nadtochiy, S. M., Zhu, Q., Urciuoli, W., Rafikov, R., Black, S. M., & Brookes, P. S.
Affiliations
University of Rochester Medicine (US)
Corresponding author
Brookes, Paul S.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2012-01
Volume
287
Issue
5
Pages
3573-3580
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2064096645
Cited by
55
References
68
Citations by year
2025: 6 · 2024: 3 · 2023: 2 · 2022: 3 · 2021: 2 · 2020: 2 · 2019: 5 · 2018: 2 · 2017: 4 · 2016: 5 · 2015: 7 · 2014: 5 · 2013: 4 · 2012: 3
FWCI
2.93
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • University of Rochester
  • National Institutes of Health (5T32HL06699, HL101902)
  • Medical Center, University of Rochester
  • National Heart, Lung, and Blood Institute (5T32-HL06699, HL101902, R01HL067841, HL-071158, HL067841, P01HL101902, R01HL071158)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Neuroscience › Neurology › Neurological Disorders and Treatments
Keywords
nitroalkenes, cardioprotection, mitochondrial uncoupling, cysteine modification, ischemia-reperfusion injury, redox signaling
MeSH terms
Animals, Cardiotonic Agents, Cell Line, Linoleic Acids, Mitochondria, Heart, Nitro Compounds, Myocardial Ischemia, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Adenine Nucleotide Translocator 1, Mice

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