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The high-output nitric oxide pathway: role and regulation

Xie, Qiao-wen, Nathan, Carl·1994·Journal of Leukocyte Biology

Abstract

Nitric oxide synthase (NOS) catalyzes the production of nitric oxide (NO), a short-lived radical gas with physiological or pathophysiological roles in nearly every organ system. The inducible NO synthase (iNOS) is a high-output isoform compared to the two constitutive NOSs. The iNOS from murine macrophages tightly binds calmodulin as a subunit, and its activity is not dependent on exogenous calmodulin or elevated calcium. This iNOS is induced at the transcriptional level by bacterial lipopolysaccharide (LPS) and interferon-γ. The promoter region of the murine iNOS gene contains at least 24 oligonucleotide motifs corresponding to elements involved in the binding of transcription factors in the promoters of other cytokine-inducible genes. Nuclear factor NF-xB/c-rel, interacting with cycloheximide-sensitive protein(s) and binding to the NF-xBd site in the iNOS promoter, controls the induction of iNOS by LPS. However, iNOS is also regulated posttranscriptionally. Complex regulation of iNOS at multiple levels may reflect the dual role of iNOS in host defense and autotoxicity. J. Leukoc. Biol. 56: 576–582; 1994.

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Metadata

Authors
Xie, Q.-W., & Nathan, C.
Venue
Journal of Leukocyte Biology
Published
1994-11-01
Volume
56
Issue
5
Pages
576-582
ISSN
  • 0741-5400 (ISSN-L)
  • 1938-3673
OpenAlex
W2101392591
Cited by
510
References
5
FWCI
16.87
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: The high-output nitric oxide pathway: role and regulation. https://app.cochat.ai/papers/10.1002/jlb.56.5.576
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Xie, Q.-W., & Nathan, C. (1994). The high-output nitric oxide pathway: role and regulation. Journal of Leukocyte Biology. https://doi.org/10.1002/jlb.56.5.576

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