Cited by 457Nitric Oxide and Endothelin EffectsImmune cells in cancerNeutrophil, Myeloperoxidase and Oxidative Mechanisms

Activated murine macrophages secrete a metabolite of arginine with the bioactivity of endothelium-derived relaxing factor and the chemical reactivity of nitric oxide

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Stuehr, D J, Gross, S S, Sakuma, I, Levi, R, Nathan, C F·1989·The Journal of experimental medicine

Abstract

L-arginine-dependent synthesis of nitrite (NO2-) and nitrate (NO3-) by macrophages correlates with and is required for their execution of nonspecific cytotoxicity toward some tumor cells and microbes. However, the bioactive L-arginine metabolites responsible for cytotoxicity are unknown. Mammalian endothelial cells have recently been shown to release nitric oxide (NO.); we therefore determined if this reactive metabolite was synthesized by activated murine macrophages. Macrophage-derived NO. was detected by two independent methods: a bioassay for NO.-mediated relaxation of preconstricted rings of rabbit aorta; and a spectroscopic measurement of the reaction of NO. with clostridial ferredoxin, an Fe-S protein. After activation with IFN-gamma and LPS, macrophages continuously secreted a substance that relaxed rabbit aortic rings denuded of endothelium. Production of the vasorelaxant was enhanced by 0.5 mM L-arginine and inhibited reversibly by NG-methylated L-arginine analogs that block macrophage NO2-/NO3- synthesis. The vasorelaxant was scavenged by ferrous myoglobin, was labile, and was neither NO2- nor a cyclooxygenase metabolite. Activated M phi also secreted a substance that bleached Fd, a reaction carried out by NO. and NO2, but not NO2-. Macrophage bleaching of Fd correlated directly with time, cell number, and concomitant NO2-/NO3- production, required L-arginine, and was independent of reactive oxygen intermediates. Thus, activated murine M phi release NO. and/or a closely related, highly reactive nitrogen oxide such as NO2, during their conversion of L-arginine to NO2-/NO3-. NO. and NO2 may mediate L-arginine-dependent pathologic effects of M phi, as well as physiologic effects not previously considered for this widely distributed cell type.

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Authors
Stuehr, D. J., Gross, S. S., Sakuma, I., Levi, R., & Nathan, C. F.
Affiliations
Cornell University (US)
Venue
The Journal of experimental medicine
Published
1989-03-01
Volume
169
Issue
3
Pages
1011-1020
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W1975644913
Cited by
457
References
35
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 3 · 2021: 6 · 2020: 5 · 2019: 4 · 2018: 5 · 2017: 2 · 2016: 6 · 2015: 8 · 2014: 9 · 2013: 10 · 2012: 4
FWCI
30.53
Type
journal article
Language
en
Open access
Locations
  • The Journal of Experimental Medicine (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL37407, HL-34215)
  • National Cancer Institute (CA-43610)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
Keywords
macrophages, nitric oxide, arginine metabolism, endothelium-derived relaxing factor, nitrite, nitrate, vasorelaxation, myoglobin, interferon-gamma, LPS, macrophage activation, reactive nitrogen species, macrophage cytotoxicity
MeSH terms
Animals, Aorta, Arginine, Biological Assay, Biological Factors, Chemistry, Endothelium, Vascular, Ferredoxins, Macrophage Activation, Macrophages, Mice, Inbred C3H, Muscle Relaxation, Muscle, Smooth, Vascular, Nitrates, Nitric Oxide, Nitrites, Nitrogen Dioxide, Rabbits, Spectrophotometry, Mice, Chemical Phenomena

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