Cited by 263Nitric Oxide and Endothelin EffectsCardiovascular Health and Disease PreventionMitochondrial Function and Pathology

Mitochondria-targeted antioxidant (MitoQ) ameliorates age-related arterial endothelial dysfunction in mice

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Gioscia‐Ryan, Rachel A., LaRocca, Thomas J., Sindler, Amy L., Zigler, Melanie C., Murphy, Michael P., Seals, Douglas R.·2014·The Journal of Physiology

Abstract

Key points The development of age‐related arterial endothelial dysfunction, a key antecedent of increased cardiovascular disease (CVD) risk, is mediated largely by reduced nitric oxide bioavailability as a consequence of oxidative stress. Mitochondria are critical signalling organelles in the vasculature, which, when dysregulated, become a source of excessive reactive oxygen species; the role of mitochondria‐derived oxidative stress in age‐related vascular dysfunction is unknown. We show that a mitochondria‐targeted antioxidant, MitoQ, ameliorates vascular endothelial dysfunction in old mice and that these improvements are associated with the normalization of mitochondria‐derived oxidative stress and markers of arterial mitochondrial health. These results indicate that mitochondria‐derived oxidative stress is an important mechanism underlying the development of age‐related vascular endothelial dysfunction and therefore may be a promising therapeutic target. Mitochondria‐targeted antioxidants represent a novel strategy for preserving healthy vascular endothelial function in primary ageing and preventing age‐related CVD in humans. Abstract Age‐related arterial endothelial dysfunction, a key antecedent of the development of cardiovascular disease (CVD), is largely caused by a reduction in nitric oxide (NO) bioavailability as a consequence of oxidative stress. Mitochondria are a major source and target of vascular oxidative stress when dysregulated. Mitochondrial dysregulation is associated with primary ageing, but its role in age‐related endothelial dysfunction is unknown. Our aim was to determine the efficacy of a mitochondria‐targeted antioxidant, MitoQ, in ameliorating vascular endothelial dysfunction in old mice. Ex vivo carotid artery endothelium‐dependent dilation (EDD) to increasing doses of acetylcholine was impaired by ∼30% in old (∼27 months) compared with young (∼8 months) mice as a result of reduced NO bioavailability ( P < 0.05). Acute ( ex vivo ) and chronic (4 weeks in drinking water) administration of MitoQ completely restored EDD in older mice by improving NO bioavailability. There were no effects of age or MitoQ on endothelium‐independent dilation to sodium nitroprusside. The improvements in endothelial function with MitoQ supplementation were associated with the normalization of age‐related increases in total and mitochondria‐derived arterial superoxide production and oxidative stress (nitrotyrosine abundance), as well as with increases in markers of vascular mitochondrial health, including antioxidant status. MitoQ also reversed the age‐related increase in endothelial susceptibility to acute mitochondrial damage (rotenone‐induced impairment in EDD). Our results suggest that mitochondria‐derived oxidative stress is an important mechanism underlying the development of endothelial dysfunction in primary ageing. Mitochondria‐targeted antioxidants such as MitoQ represent a promising novel strategy for the preservation of vascular endothelial function with advancing age and the prevention of age‐related CVD.

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Crossref · 10.1113/jphysiol.2013.268680

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  • Both the conditions of hyperlipidemia and hyperglycemia impair mitochondrial dynamics by shifting the balance to excessive mitochondrial fission, leading to mitochondrial ROS over production and ETC impairment.

    “Both the conditions of hyperlipidemia and hyperglycemia impair mitochondrial dynamics by shifting the balance to excessive mitochondrial fission, leading to mitochondrial ROS over production and ETC impairment [221,222,223].”

    From AMPK, Mitochondrial Function, and Cardiovascular Disease (2020) · cites this paper as [221]

  • Mitochondrial dynamics plays a pivotal role in endothelial dysfunction during macrovascular complications.

    “A line of evidence indicates that mitochondrial dynamics plays a pivotal role in endothelial dysfunction during macrovascular complications [220,221].”

    From AMPK, Mitochondrial Function, and Cardiovascular Disease (2020) · cites this paper as [221]

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Authors
Gioscia‐Ryan, R. A., LaRocca, T. J., Sindler, A. L., Zigler, M. C., Murphy, M. P., & Seals, D. R.
Affiliations
  • University of Colorado Boulder (US)
  • MRC Mitochondrial Biology Unit (GB)
Corresponding author
Seals, Douglas R.
Venue
The Journal of Physiology
Publisher
Wiley
Published
2014-04-23
Volume
592
Issue
12
Pages
2549-2561
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W1492660023
Cited by
263
References
59
Citations by year
2026: 18 · 2025: 24 · 2024: 23 · 2023: 28 · 2022: 24 · 2021: 22 · 2020: 27 · 2019: 22 · 2018: 25 · 2017: 12 · 2016: 22 · 2015: 9 · 2014: 6
FWCI
10.89
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institutes of Health (AG000279, AG039210, AG013038)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
MitoQ, mitochondria-targeted antioxidants, endothelial dysfunction, age-related vascular dysfunction, oxidative stress, nitric oxide bioavailability, superoxide, mitochondrial dysfunction, nitrotyrosine, endothelium-dependent dilation, cardiovascular disease prevention, aging, mitochondrial health, antioxidant status, acetylcholine, sodium nitroprusside, carotid artery, reactive oxygen species
MeSH terms
Aging, Animals, Antioxidants, Aorta, Thoracic, Endothelium, Vascular, Male, Mice, Inbred C57BL, Mitochondria, Nitric Oxide, Organophosphorus Compounds, Superoxides, Ubiquinone, Vascular Diseases, Vasodilation, Oxidative Stress, Nitric Oxide Synthase

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