Cited by 105Hemoglobin structure and functionNitric Oxide and Endothelin EffectsHeme Oxygenase-1 and Carbon Monoxide

Cytoglobin regulates blood pressure and vascular tone through nitric oxide metabolism in the vascular wall

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Liu, Xiaoping, El-Mahdy, Mohamed A., Boslett, James, Varadharaj, Saradhadevi, Hemann, Craig, Abdelghany, Tamer M., Ismail, Raed S., Little, Sean C. +4 more·2017·Nature Communications

Abstract

The identity of the specific nitric oxide dioxygenase (NOD) that serves as the main in vivo regulator of O 2 -dependent NO degradation in smooth muscle remains elusive. Cytoglobin (Cygb) is a recently discovered globin expressed in fibroblasts and smooth muscle cells with unknown function. Cygb, coupled with a cellular reducing system, efficiently regulates the rate of NO consumption by metabolizing NO in an O 2 -dependent manner with decreased NO consumption in physiological hypoxia. Here we show that Cygb is a major regulator of NO degradation and cardiovascular tone. Knockout of Cygb greatly prolongs NO decay, increases vascular relaxation, and lowers blood pressure and systemic vascular resistance. We further demonstrate that downregulation of Cygb prevents angiotensin-mediated hypertension. Thus, Cygb has a critical role in the regulation of vascular tone and disease. We suggest that modulation of the expression and NOD activity of Cygb represents a strategy for the treatment of cardiovascular disease.

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  • GSNOR catalyzes the denitrosation of glutathione and thus regulates the equilibrium of S-nitrosation.

    “The best characterized enzyme in this class is S-nitrosoglutathione reductase (GSNOR), a member of the aldehyde dehydrogenase enzyme group, which catalyzes the denitrosation of glutathione and thus regulates the equilibrium of S-nitrosation (592).”

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Authors
Liu, X., El-Mahdy, M. A., Boslett, J., Varadharaj, S., Hemann, C., Abdelghany, T. M., Ismail, R. S., Little, S. C., Zhou, D., Thuy, L. T. T., Kawada, N., & Zweier, J. L.
Affiliations
  • The Ohio State University (US)
  • Osaka City University (JP)
Corresponding author
  • Liu, Xiaoping
  • Zweier, Jay L.
Venue
Nature Communications
Published
2017-04-10
Volume
8
Issue
1
Pages
14807-14807
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2605577408
Cited by
105
References
72
Citations by year
2026: 7 · 2025: 9 · 2024: 6 · 2023: 13 · 2022: 11 · 2021: 12 · 2020: 15 · 2019: 9 · 2018: 16 · 2017: 7
FWCI
6.86
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Ohio State University
  • China Scholarship Council
  • National Institutes of Health (EB0169096, HL131941)
  • Japan Society for the Promotion of Science (16K19363)
  • National Heart, Lung, and Blood Institute (R01HL063744, R01HL135648, R01HL038324, R01HL131941)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heme Oxygenase-1 and Carbon Monoxide
Keywords
nitric oxide dioxygenase, nitric oxide metabolism, blood pressure regulation, vascular tone, vascular smooth muscle, systemic vascular resistance, hypoxia, vasorelaxation, cardiovascular disease
MeSH terms
Cytoglobin, Animals, Blood Pressure, Cardiovascular Diseases, Cells, Cultured, Female, Cyclic GMP, Male, Muscle Tonus, Muscle, Smooth, Vascular, Nitric Oxide, Oxygenases, Vascular Resistance, Vasodilation, Down-Regulation, Tunica Intima, Mice, Knockout, Mice, Rats, Nitric Oxide Synthase Type III, Gene Knockdown Techniques

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