Cited by 260Vitamin C and Antioxidants ResearchAntioxidant Activity and Oxidative StressNitric Oxide and Endothelin Effects

Aortic wall damage in mice unable to synthesize ascorbic acid

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Maeda, Nobuyo, Hagihara, Hiroyuki, Nakata, Yukiko, Hiller, Sylvia, Wilder, Jennifer, Reddick, Robert·2000·Proceedings of the National Academy of Sciences

Abstract

By inactivating the gene for l -gulono-γ-lactone oxidase, a key enzyme in ascorbic acid synthesis, we have generated mice that, like humans, depend on dietary vitamin C. Regular chow, containing about 110 mg/kg of vitamin C, is unable to support the growth of the mutant mice, which require l -ascorbic acid supplemented in their drinking water (330 mg/liter). Upon withdrawal of supplementation, plasma and tissue ascorbic acid levels decreased to 10–15% of normal within 2 weeks, and after 5 weeks the mutants became anemic, began to lose weight, and die. Plasma total antioxidative capacities were approximately 37% normal in homozygotes after feeding the unsupplemented diet for 3–5 weeks. As plasma ascorbic acid decreased, small, but significant, increases in total cholesterol and decreases in high density lipoprotein cholesterol were observed. The most striking effects of the marginal dietary vitamin C were alterations in the wall of aorta, evidenced by the disruption of elastic laminae, smooth muscle cell proliferation, and focal endothelial desquamation of the luminal surface. Thus, marginal vitamin C deficiency affects the vascular integrity of mice unable to synthesize ascorbic acid, with potentially profound effects on the pathogenesis of vascular diseases. Breeding the vitamin C-dependent mice with mice carrying defined genetic mutations will provide numerous opportunities for systematic studies of the role of antioxidants in health and disease.

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Crossref · 10.1073/pnas.97.2.841

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Authors
Maeda, N., Hagihara, H., Nakata, Y., Hiller, S., Wilder, J., & Reddick, R.
Affiliations
University of North Carolina at Chapel Hill (US)
Venue
Proceedings of the National Academy of Sciences
Published
2000-01-18
Volume
97
Issue
2
Pages
841-846
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1997409763
Cited by
260
References
36
Citations by year
2026: 3 · 2025: 11 · 2024: 17 · 2023: 8 · 2022: 12 · 2021: 8 · 2020: 14 · 2019: 11 · 2018: 10 · 2017: 12 · 2016: 8 · 2015: 11 · 2014: 10 · 2013: 24 · 2012: 18
FWCI
4.63
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
  • American Heart Association
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL 42630, R37HL042630, R01HL042630)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Vitamin C and Antioxidants Research
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
Keywords
scurvy, ascorbic acid biosynthesis, elastic lamina, smooth muscle cell proliferation, endothelial desquamation, plasma antioxidant capacity, total cholesterol, HDL cholesterol, vascular integrity, antioxidants
MeSH terms
Animals, Antioxidants, Aorta, Thoracic, Ascorbic Acid, Ascorbic Acid Deficiency, Cell Division, Cholesterol, Diet, Elastic Tissue, Female, Genotype, Homozygote, Cholesterol, HDL, Male, Mice, Inbred C57BL, Mice, Mutant Strains, Microscopy, Electron, Muscle, Smooth, Vascular, Sugar Alcohol Dehydrogenases, Mutagenesis, Site-Directed, L-Gulonolactone Oxidase, Mice, Rats

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