Identification of nitric oxide synthase as a protective locus against tuberculosis
Open accessAbstract
Mutagenesis of the host immune system has helped identify response pathways necessary to combat tuberculosis. Several such pathways may function as activators of a common protective gene: inducible nitric oxide synthase (NOS2). Here we provide direct evidence for this gene controlling primary Mycobacterium tuberculosis infection using mice homozygous for a disrupted NOS2 allele. NOS2 −/− mice proved highly susceptible, resembling wild-type littermates immunosuppressed by high-dose glucocorticoids, and allowed Mycobacterium tuberculosis to replicate faster in the lungs than reported for other gene-deficient hosts. Susceptibility appeared to be independent of the only known naturally inherited antimicrobial locus, NRAMP1 . Progression of chronic tuberculosis in wild-type mice was accelerated by specifically inhibiting NOS2 via administration of N 6 -(1-iminoethyl)- l -lysine. Together these findings identify NOS2 as a critical host gene for tuberculostasis.
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Highly reactive intermediates execute their microbicidal activity by oxidative destruction of membrane lipids, DNA, thiol and tyrosine residues, whereas NO can exert toxicity by directly targeting iron sulfur clusters of central metabolic enzymes.
“Nonetheless, these highly reactive intermediates execute their microbicidal activity by oxidative destruction of membrane lipids, DNA, thiol and tyrosine residues, whereas NO can exert toxicity by directly targeting iron sulfur cluster of central metabolic enzymes (57, 58, 70–72).”
From Macrophage defense mechanisms against intracellular bacteria (2015) · cites this paper as [72]
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- Authors
- MacMicking, J. D., North, R. J., LaCourse, R., Mudgett, J. S., Shah, S. K., & Nathan, C. F.
- Affiliations
- Trudeau Institute (US)
- Beatrice & Samuel A. Seaver Laboratory, Department of Medicine, Cornell University Medical College, New York, NY 10021; Trudeau Institute, Saranac Lake, NY 12983; and Departments of Immunology and Inflammation and Medicinal Chemistry, Merck Research Laboratories, Rahway, NJ 07065
- Corresponding author
- MacMicking, John D.
- Nathan, Carl F.
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 1997-05-13
- Volume
- 94
- Issue
- 10
- Pages
- 5243-5248
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC24663
- OpenAlex
- W2019255399
- Cited by
- 1,180
- References
- 49
- Citations by year
- 2026: 28 · 2025: 16 · 2024: 23 · 2023: 22 · 2022: 23 · 2021: 41 · 2020: 33 · 2019: 42 · 2018: 43 · 2017: 39 · 2016: 46 · 2015: 46 · 2014: 50 · 2013: 43 · 2012: 44
- FWCI
- 39.49
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Proceedings of the National Academy of Sciences (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (1r01hl051960-01, 5r01hl051967-08)
- National Heart, Lung, and Blood Institute (HL51967, HL-51960)
- National Institute of Allergy and Infectious Diseases (AI-34543)
- Topics
- Health Sciences › Medicine › Infectious Diseases › Tuberculosis Research and Epidemiology
- Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
- Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
- Keywords
- inducible nitric oxide synthase, NOS2, tuberculosis, Mycobacterium tuberculosis, host resistance, NOS2 knockout mice, glucocorticoid-induced immunosuppression, NRAMP1, chronic tuberculosis, nitric oxide inhibition, host immune response
- MeSH terms
- Natural Resistance-associated Macrophage Protein 1, Alleles, Animals, Carrier Proteins, Crosses, Genetic, Disease Susceptibility, Exons, Female, Genotype, Glucocorticoids, Haplotypes, Heterozygote, Homozygote, Immunity, Innate, Immunosuppression Therapy, Isoenzymes, Lung, Male, Membrane Proteins, Mice, Inbred C57BL, Mice, Inbred Strains, Mycobacterium tuberculosis, Polymorphism, Genetic, Tuberculosis, Polymerase Chain Reaction, Mice, Knockout, Nitric Oxide Synthase, Cation Transport Proteins, Mice
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