Cited by 42Nitric Oxide and Endothelin EffectsRedox biology and oxidative stressNeutrophil, Myeloperoxidase and Oxidative Mechanisms

Autocrine/paracrine pattern of superoxide production through NAD(P)H oxidase in coronary arterial myocytes

Zhang, Guo, Zhang, Fan, Muh, Rachel, Yi, Fan, Chalupsky, Karel, Cai, Hua, Li, Pin-Lan·2007·American Journal of Physiology-Heart and Circulatory Physiology

Abstract

The present study tested the hypothesis that membrane-bound NAD(P)H oxidase in coronary arterial myocytes (CAMs) is capable of producing superoxide (O 2•−) toward extracellular space to exert an autocrine- or paracrine-like action in these cells. Using a high-speed wavelength-switching fluorescent microscopic imaging technique, we simultaneously monitored the binding of dihydroethidium-oxidizing product to exogenous salmon testes DNA trapped outside CAMs and to nuclear DNA as indicators of extra- and intracellular O 2•−production. It was found that a muscarinic agonist oxotremorine (OXO; 80 μM) increased O 2•−levels more rapidly outside than inside CAMs. In the presence of superoxide dismutase (500 U/ml) plus catalase (400 U/ml) and NAD(P)H oxidase inhibitor diphenylene iodonium (50 μM) or apocynin (100 μM), these increases in extra- and intracellular O 2•−levels were substantially abolished or attenuated. The O 2•−increase outside CAMs was also confirmed by detecting oxidation of nitro blue tetrazolium and confocal microscopic localization of Matrigel-trapped OxyBURST H 2 HFF Green BSA staining around these cells. By electron spin resonance spectrometry, the extracellular accumulation of O 2•−was demonstrated as a superoxide dismutase-sensitive component outside CAMs. Furthermore, RNA interference of NAD(P)H oxidase subunits Nox1 or p47 markedly blocked OXO-induced increases in both extra- and intracellular O 2•−levels, whereas small inhibitory RNA of Nox4 only attenuated intracellular O 2•−accumulation. These results suggest that Nox1 represents a major NAD(P)H oxidase isoform responsible for extracellular O 2•−production. This rapid extracellular production of O 2•−seems to be unique to OXO-induced M 1-receptor activation, since ANG II-induced intra- and extracellular O 2•−increases in parallel. It is concluded that the outward production of O 2•−via NAD(P)H oxidase in CAMs may represent an important producing pattern for its autocrine or paracrine actions.

Integrity signals

Registry

Crossref · 10.1152/ajpheart.00632.2006

Cites

61 of 61 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Zhang, G., Zhang, F., Muh, R., Yi, F., Chalupsky, K., Cai, H., & Li, P.-L.
Affiliations
Virginia Commonwealth University Medical Center (US)
Venue
American Journal of Physiology-Heart and Circulatory Physiology
Published
2007-01
Volume
292
Issue
1
Pages
H483-H495
ISSN
  • 0363-6135 (ISSN-L)
  • 1522-1539
OpenAlex
W2114143085
Cited by
42
References
60
Citations by year
2024: 1 · 2021: 1 · 2020: 1 · 2018: 1 · 2017: 1 · 2015: 3 · 2014: 4 · 2013: 6 · 2012: 3
FWCI
3.09
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Heart and Circulatory Physiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Heart, Lung, and Blood Institute (HL-70726, R01HL077440, HL 57244, R01HL070726, HL-75316, R01HL075316)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
Keywords
NADPH oxidase, superoxide production, autocrine signaling, paracrine signaling, NOX1, NOX4, p47phox, M1 muscarinic receptor, oxotremorine, angiotensin II, extracellular superoxide, diphenyleneiodonium, apocynin, superoxide dismutase, catalase
MeSH terms
Animals, Cattle, Cells, Cultured, Coronary Vessels, Oxidation-Reduction, Superoxides, NADPH Oxidases, Paracrine Communication, Myocytes, Cardiac, In Vitro Techniques

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review