Cited by 67Air Quality and Health ImpactsNitric Oxide and Endothelin EffectsPlant responses to elevated CO2

Ozone inhalation impairs coronary artery dilation via intracellular oxidative stress: evidence for serum-borne factors as drivers of systemic toxicity

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Paffett, Michael L., Zychowski, Katherine E., Sheppard, Lianne, Robertson, Sarah, Weaver, John M., Lucas, Selita N., Campen, Matthew J.·2015·Toxicological Sciences

Abstract

Ambient ozone (O3) levels are associated with cardiovascular morbidity and mortality, but the underlying pathophysiological mechanisms driving extrapulmonary toxicity remain unclear. This study examined the coronary vascular bed of rats in terms of constrictive and dilatory responses to known agonists following a single O3 inhalation exposure. In addition, serum from exposed rats was used in ex vivo preparations to examine whether bioactivity and toxic effects of inhaled O3 could be conveyed to extrapulmonary systems via the circulation. We found that 24 h following inhalation of 1 ppm O3, isolated coronary vessels exhibited greater basal tone and constricted to a greater degree to serotonin stimulation. Vasodilation to acetylcholine (ACh) was markedly diminished in coronary arteries from O3-exposed rats, compared with filtered air-exposed controls. Dilation to ACh was restored by combined superoxide dismutase and catalase treatment, and also by NADPH oxidase inhibition. When dilute (10%) serum from exposed rats was perfused into the lumen of coronary arteries from unexposed, naïve rats, the O3-induced reduction in vasodilatory response to ACh was partially recapitulated. Furthermore, following O3 inhalation, serum exhibited a nitric oxide scavenging capacity, which may partially explain blunted ACh-mediated vasodilatory responses. Thus, bioactivity from inhalation exposures may be due to compositional changes of the circulation. These studies shed light on possible mechanisms of action that may explain O3-associated cardiac morbidity and mortality in humans.

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Crossref · 10.1093/toxsci/kfv093

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  • Animal studies with high ozone exposures have generated more consistent findings on cardiovascular effects of ozone through altering vascular tone, mRNA for genes encoding thrombogenic factors, and atherogenesis.

    “In contrast, animal studies with high ozone exposures have generated more consistent findings on cardiovascular effects of ozone through altering vascular tone (60–62), mRNA for genes encoding thrombogenic factors (63), and atherogenesis (60).”

    From Ozone pollution: A Major health hazard worldwide (2019) · cites this paper as [61]

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Authors
Paffett, M. L., Zychowski, K. E., Sheppard, L., Robertson, S., Weaver, J. M., Lucas, S. N., & Campen, M. J.
Affiliations
  • University of New Mexico (US)
  • University of Washington (US)
  • Public Health England (GB)
Venue
Toxicological Sciences
Published
2015-05-11
Volume
146
Issue
2
Pages
244-253
ISSN
  • 1096-0929 (ISSN-L)
  • 1096-6080
OpenAlex
W2103398685
Cited by
67
References
51
Citations by year
2025: 3 · 2024: 4 · 2023: 7 · 2022: 4 · 2021: 9 · 2020: 9 · 2019: 7 · 2018: 5 · 2017: 9 · 2016: 8 · 2015: 2
FWCI
5.01
Type
journal article
Language
en
Open access
Locations
  • Toxicological Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (P30GM103400, K12GM088021)
  • National Institute of Environmental Health Sciences (R01ES014639)
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Air Quality and Health Impacts
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant responses to elevated CO2
Keywords
ozone inhalation, coronary artery dilation, oxidative stress, acetylcholine-induced vasodilation, serotonin-induced vasoconstriction, systemic toxicity, nitric oxide scavenging, superoxide dismutase, catalase, NADPH oxidase, cardiovascular effects of air pollution, coronary vasomotor tone
MeSH terms
Acetylcholine, Animals, Blood, Coronary Vessels, Male, Ozone, Serotonin, Vasodilation, Rats, Sprague-Dawley, Oxidative Stress, Inhalation Exposure, Mice, Rats

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