Cited by 67Tuberculosis Research and EpidemiologyImmune responses and vaccinationsImmune Response and Inflammation

ESAT-6–dependent cytosolic pattern recognition drives noncognate tuberculosis control in vivo

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Kupz, Andreas, Zedler, Ulrike, Stäber, Manuela, Perdomo, Carolina, Dorhoi, Anca, Brosch, Roland, Kaufmann, Stefan H.E.·2016·Journal of Clinical Investigation

Abstract

IFN-γ is a critical mediator of host defense against Mycobacterium tuberculosis (Mtb) infection. Antigen-specific CD4+ T cells have long been regarded as the main producer of IFN-γ in tuberculosis (TB), and CD4+ T cell immunity is the main target of current TB vaccine candidates. However, given the recent failures of such a TB vaccine candidate in clinical trials, strategies to harness CD4-independent mechanisms of protection should be included in future vaccine design. Here, we have reported that noncognate IFN-γ production by Mtb antigen-independent memory CD8+ T cells and NK cells is protective during Mtb infection and evaluated the mechanistic regulation of IFN-γ production by these cells in vivo. Transfer of arenavirus- or protein-specific CD8+ T cells or NK cells reduced the mortality and morbidity rates of mice highly susceptible to TB in an IFN-γ-dependent manner. Secretion of IFN-γ by these cell populations required IL-18, sensing of mycobacterial viability, Mtb protein 6-kDa early secretory antigenic target-mediated (ESAT-6-mediated) cytosolic contact, and activation of NLR family pyrin domain-containing protein 3 (NLRP3) inflammasomes in CD11c+ cell subsets. Neutralization of IL-18 abrogated protection in susceptible recipient mice that had received noncognate cells. Moreover, improved Mycobacterium bovis bacillus Calmette-Guérin (BCG) vaccine-induced protection was lost in the absence of ESAT-6-dependent cytosolic contact. Our findings provide a comprehensive mechanistic framework for antigen-independent IFN-γ secretion in response to Mtb with critical implications for future intervention strategies against TB.

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  • Due to the absence of ESX-1, BCG does not gain access to the host cell cytosol and thus lacks the induction of certain immune signaling pathways.

    “Due to the absence of ESX-1, BCG does not gain access to the host cell cytosol and thus lacks the induction of certain immune signaling pathways (74,86).”

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  1. tionally distinct T cell subsets via T cell repertoire diversity. Mol Immunol. 2008;45(3):607-618. · DOI

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Authors
Kupz, A., Zedler, U., Stäber, M., Perdomo, C., Dorhoi, A., Brosch, R., & Kaufmann, S. H. E.
Affiliations
  • Australian Institute of Tropical Health and Medicine (AU)
  • Max Planck Institute for Infection Biology (DE)
  • Institut Pasteur (FR)
Corresponding author
  • Kupz, Andreas
  • Kaufmann, Stefan H.E.
Venue
Journal of Clinical Investigation
Published
2016-04-25
Volume
126
Issue
6
Pages
2109-2122
ISSN
  • 0021-9738 (ISSN-L)
  • 1558-8238
OpenAlex
W2343808808
Cited by
67
References
86
Citations by year
2026: 5 · 2025: 3 · 2024: 3 · 2022: 4 · 2021: 4 · 2020: 8 · 2019: 11 · 2018: 10 · 2017: 11 · 2016: 7
FWCI
11.99
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • ResearchOnline - JCU (James Cook University) (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
  • Max Planck Digital Library (submittedVersion)
Funders
  • University of Washington
  • European Commission (EU-FP7)
  • Max-Planck-Gesellschaft
  • Université de Lausanne
  • Rheinische Friedrich-Wilhelms-Universität Bonn
  • Genentech
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
tuberculosis, Mycobacterium tuberculosis, ESAT-6, CD8+ T cells, natural killer cells, IL-18, NLRP3 inflammasome, pattern recognition, CD11c+ cells, BCG vaccine, host defense
MeSH terms
Animals, Antigens, Bacterial, Bacterial Proteins, BCG Vaccine, Cytosol, Dendritic Cells, Disease Models, Animal, Female, Humans, Immunity, Innate, Immunologic Memory, Interferon-gamma, Male, Mice, Inbred C57BL, Mycobacterium tuberculosis, Tuberculosis, Pulmonary, Virulence, CD4-Positive T-Lymphocytes, Mice, Knockout, CD8-Positive T-Lymphocytes, Interleukin-18, Mice

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