Cited by 69Research on Leishmaniasis StudiesLeprosy Research and TreatmentParasitic Diseases Research and Treatment

Hypoxia in Leishmania major Skin Lesions Impairs the NO-Dependent Leishmanicidal Activity of Macrophages

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Mahnke, Alexander, Meier, Robert J., Schatz, Valentin, Hofmann, Julian, Castiglione, Kirstin, Schleicher, Ulrike, Wolfbeis, Otto S., Bogdan, Christian +1 more·2014·Journal of Investigative Dermatology

Abstract

Cure of infections with Leishmania major is critically dependent on the ability of macrophages to induce the type 2 nitic oxide (NO) synthase (NOS2) that produces high levels of NO in the presence of ample oxygen. Therefore, we analyzed the oxygen levels found in leishmanial skin lesions and their effect on the NOS2-dependent leishmanicidal activity of macrophages (MΦ). When L. major skin lesions of self-healing C57BL/6 mice reached their maximum size, the infected tissue displayed low oxygen levels (pO2∼21 Torr). MΦ activated under these oxygen tensions failed to produce sufficient amounts of NO to clear L. major. Nos2-deficient and hypoxic wild-type macrophages displayed a similar phenotype. Killing was restored when MΦ were reoxygenated or exposed to a NO donor. The resolution of the lesion in C57BL/6 mice was paralleled by an increase of lesional pO2. When mice were kept under normobaric hypoxia, this caused a persistent suppression of the lesional pO2 and a concurrent increase of the parasite load. In Nos2-deficient mice, there was no effect of atmospheric hypoxia. Low oxygen levels found at leishmanial skin lesions impaired the NOS2-dependent leishmanicidal activity of MΦ. Hence, tissue oxygenation represents an underestimated local milieu factor that participates in the persistence of Leishmania.

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Research works printed but not linked: 2

  1. A Mahnke et al. Skin Tissue Oxygen in Leishmaniasis www.jidonline.org 2345 https://www.sciencedirect.com/journal/journal-of-investigative-dermatology
  2. Sheffield PJ (1988) Tissue Oxygen Measurements. In: Davis JC, Hunt TK (eds). Elsevier: New York, NY, USA, 17-52

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Authors
Mahnke, A., Meier, R. J., Schatz, V., Hofmann, J., Castiglione, K., Schleicher, U., Wolfbeis, O. S., Bogdan, C., & Jantsch, J.
Affiliations
  • Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
  • University of Regensburg (DE)
Corresponding author
Jantsch, Jonathan
Venue
Journal of Investigative Dermatology
Publisher
Elsevier BV
Published
2014-09
Volume
134
Issue
9
Pages
2339-2346
ISSN
0022-202X (ISSN-L)
OpenAlex
W2085963325
Cited by
69
References
49
Citations by year
2026: 5 · 2025: 8 · 2024: 7 · 2023: 5 · 2022: 7 · 2021: 4 · 2020: 3 · 2019: 3 · 2018: 5 · 2017: 5 · 2016: 6 · 2015: 6 · 2014: 5
FWCI
7.30
Type
journal article
Language
en
Open access
Locations
  • Journal of Investigative Dermatology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Deutsche Forschungsgemeinschaft (JA 1993/1-1)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Research on Leishmaniasis Studies
  • Health Sciences › Medicine › Infectious Diseases › Leprosy Research and Treatment
  • Health Sciences › Medicine › Infectious Diseases › Parasitic Diseases Research and Treatment
Keywords
Leishmania major, cutaneous leishmaniasis, hypoxia, tissue oxygen tension, nitric oxide, NOS2, parasite clearance, reoxygenation, infection intensity, host-parasite interactions
MeSH terms
Animals, Hypoxia, Arginase, Atmosphere Exposure Chambers, Macrophages, Mice, Inbred BALB C, Mice, Inbred C57BL, Nitric Oxide, Oxygen, Phenotype, Skin, Leishmaniasis, Cutaneous, Leishmania major, Mice, Knockout, Nitric Oxide Synthase Type II

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