Cited by 207Nitric Oxide and Endothelin EffectsMitochondrial Function and PathologyCardiovascular Health and Disease Prevention

Manganese superoxide dismutase and aldehyde dehydrogenase deficiency increase mitochondrial oxidative stress and aggravate age-dependent vascular dysfunction

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Wenzel, Philip, Schuhmacher, Swenja, Kienhöfer, Joachim, Müller, Johanna, Hortmann, Marcus, Oelze, Matthias, Schulz, Eberhard, Treiber, Nicolai +6 more·2008·Cardiovascular Research

Abstract

AIMS: Imbalance between pro- and antioxidant species (e.g. during aging) plays a crucial role for vascular function and is associated with oxidative gene regulation and modification. Vascular aging is associated with progressive deterioration of vascular homeostasis leading to reduced relaxation, hypertrophy, and a higher risk of thrombotic events. These effects can be explained by a reduction in free bioavailable nitric oxide that is inactivated by an age-dependent increase in superoxide formation. In the present study, mitochondria as a source of reactive oxygen species (ROS) and the contribution of manganese superoxide dismutase (MnSOD, SOD-2) and aldehyde dehydrogenase (ALDH-2) were investigated. METHODS AND RESULTS: Age-dependent effects on vascular function were determined in aortas of C57/Bl6 wild-type (WT), ALDH-2(-/-), MnSOD(+/+), and MnSOD(+/-) mice by isometric tension measurements in organ chambers. Mitochondrial ROS formation was measured by luminol (L-012)-enhanced chemiluminescence and 2-hydroxyethidium formation with an HPLC-based assay in isolated heart mitochondria. ROS-mediated mitochondrial DNA (mtDNA) damage was detected by a novel and modified version of the fluorescent-detection alkaline DNA unwinding (FADU) assay. Endothelial dysfunction was observed in aged C57/Bl6 WT mice in parallel to increased mitochondrial ROS formation and oxidative mtDNA damage. In contrast, middle-aged ALDH-2(-/-) mice showed a marked vascular dysfunction that was similar in old ALDH-2(-/-) mice suggesting that ALDH-2 exerts age-dependent vasoprotective effects. Aged MnSOD(+/-) mice showed the most pronounced phenotype such as severely impaired vasorelaxation, highest levels of mitochondrial ROS formation and mtDNA damage. CONCLUSION: The correlation between mtROS formation and acetylcholine-dependent relaxation revealed that mitochondrial radical formation significantly contributes to age-dependent endothelial dysfunction.

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  • In one study, 16-month-old MnSOD+/− mice showed elevated reactive oxygen species production and mtDNA damage followed by endothelial dysfunction.

    “In one study, 16-month-old MnSOD+/− mice consistently showed elevated ROS production and mtDNA damage, followed by the development of dramatic endothelial dysfunction182.”

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Authors
Wenzel, P., Schuhmacher, S., Kienhöfer, J., Müller, J., Hortmann, M., Oelze, M., Schulz, E., Treiber, N., Kawamoto, T., Scharffetter-Kochanek, K., Münzel, T., Bürkle, A., Bachschmid, M. M., & Daiber, A.
Affiliations
  • Johannes Gutenberg University Mainz (DE)
  • University of Konstanz (DE)
  • Universität Ulm (DE)
  • University of Occupational and Environmental Health Japan (JP)
  • Boston University (US)
Corresponding author
Daiber, Andreas
Venue
Cardiovascular Research
Published
2008-07-02
Volume
80
Issue
2
Pages
280-289
ISSN
  • 0008-6363 (ISSN-L)
  • 1755-3245
OpenAlex
W2139020323
Cited by
207
References
45
Citations by year
2026: 1 · 2025: 8 · 2024: 6 · 2023: 6 · 2022: 9 · 2021: 7 · 2020: 8 · 2019: 10 · 2018: 10 · 2017: 14 · 2016: 16 · 2015: 15 · 2014: 17 · 2013: 12 · 2012: 17
FWCI
11.32
Type
journal article
Language
en
Open access
Locations
  • Cardiovascular Research (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • KOPS (University of Konstanz) (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft
  • Deutsche Herzstiftung
  • National Institute on Aging (R01AG027080)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
Keywords
manganese superoxide dismutase, ALDH2, mitochondrial oxidative stress, vascular aging, endothelial dysfunction, mitochondrial reactive oxygen species, mitochondrial DNA damage, vasorelaxation, acetylcholine, nitric oxide, superoxide, aorta
MeSH terms
Aldehyde Dehydrogenase, Mitochondrial, Superoxide Dismutase 2, Age Factors, Aging, Aldehyde Dehydrogenase, Animals, Aorta, DNA Damage, DNA, Mitochondrial, Dose-Response Relationship, Drug, Endothelium, Vascular, Male, Mice, Inbred C57BL, Mitochondria, Heart, Muscle, Smooth, Vascular, Superoxide Dismutase, Vasodilation, Vasodilator Agents, Reactive Oxygen Species, Mice, Knockout, Oxidative Stress, Mice

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