Cited by 240Tuberculosis Research and EpidemiologyMycobacterium research and diagnosisInfectious Diseases and Tuberculosis

ESX-1 and phthiocerol dimycocerosates of Mycobacterium tuberculosis act in concert to cause phagosomal rupture and host cell apoptosis

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Augenstreich, Jacques, Arbues, Ainhoa, Simeone, Roxane, Haanappel, Evert, Wegener, Alice, Sayes, Fadel, Le Chevalier, Fabien, Chalut, Christian +4 more·2017·Cellular Microbiology

Abstract

Although phthiocerol dimycocerosates (DIM) are major virulence factors of Mycobacterium tuberculosis (Mtb), the causative agent of human tuberculosis, little is known about their mechanism of action. Localized in the outer membrane of mycobacterial pathogens, DIM are predicted to interact with host cell membranes. Interaction with eukaryotic membranes is a property shared with another virulence factor of Mtb, the early secretory antigenic target EsxA (also known as ESAT-6). This small protein, which is secreted by the type VII secretion system ESX-1 (T7SS/ESX-1), is involved in phagosomal rupture and cell death induced by virulent mycobacteria inside host phagocytes. In this work, by the use of several knock-out or knock-in mutants of Mtb or Mycobacterium bovis BCG strains and different cell biological assays, we present conclusive evidence that ESX-1 and DIM act in concert to induce phagosomal membrane damage and rupture in infected macrophages, ultimately leading to host cell apoptosis. These results identify an as yet unknown function for DIM in the infection process and open up a new research field for the study of the interaction of lipid and protein virulence factors of Mtb.

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Crossref · 10.1111/cmi.12726

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  • Besides ESX-1, the mycobacterial virulence lipids phthiocerol dimycocerosates also contribute to phagosomal rupture.

    “However, ESX-1 is not the only factor involved in the process; it has been shown that besides ESX-1, the mycobacterial virulence lipids phthiocerol dimycocerosates also contribute to phagosomal rupture (76)(77)(78).”

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  1. Sanchez, S. A., Tricerri, M. A., Gunther, G., & Gratton, E. (2007). Laurdan Generalized Polarization: from cuvette to microscope. In E. A. Méndez-Vilas, & J. Díaz (Eds.), In modern research and educational topics in microscopy (pp. 1007-1014).

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Authors
Augenstreich, J., Arbues, A., Simeone, R., Haanappel, E., Wegener, A., Sayes, F., Le Chevalier, F., Chalut, C., Malaga, W., Guilhot, C., Brosch, R., & Astarie-Dequeker, C.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Institut de Pharmacologie et de Biologie Structurale (IPBS); CNRS-Université de Toulouse (UPS); Toulouse France
  • Unit for Integrated Mycobacterial Pathogenomics; Institut Pasteur; Paris France
  • Institut Pasteur (FR)
Corresponding author
Brosch, Roland
Venue
Cellular Microbiology
Publisher
Wiley
Published
2017-02-15
Volume
19
Issue
7
Pages
e12726
ISSN
1462-5814 (ISSN-L)
OpenAlex
W2580358075
Cited by
240
References
85
Citations by year
2026: 26 · 2025: 19 · 2024: 25 · 2023: 25 · 2022: 30 · 2021: 23 · 2020: 31 · 2019: 23 · 2018: 22 · 2017: 15
FWCI
19.15
Type
journal article
Language
en
Open access
Locations
  • Cellular Microbiology (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
  • Zenodo (CERN European Organization for Nuclear Research) (submittedVersion, other-oa)
Funders
  • TRI-Genotoul Imaging facility (Toulouse, France)
  • BEI Resources, NIAID, NIH: Recombinant Protein Reference Standard, NR-14868
  • European Community's (TBVAC2020, 643381)
  • Agence Nationale de la Recherche (ANR-10-LABX-62-IBEID, ANR-14-JAMR-001-02, ANR-16-CE15-0003)
  • Fondation pour la Recherche Médicale (DEQ20090515399, DEQ20130326471, ING20140129051)
  • Centre National de la Recherche Scientifique
Topics
  • Health Sciences › Medicine › Infectious Diseases › Tuberculosis Research and Epidemiology
  • Health Sciences › Medicine › Epidemiology › Mycobacterium research and diagnosis
  • Health Sciences › Medicine › Surgery › Infectious Diseases and Tuberculosis
Keywords
Mycobacterium tuberculosis, phthiocerol dimycocerosate, ESX-1, ESAT-6, type VII secretion system, host cell apoptosis, macrophages, virulence factors, protein-lipid interactions, Mycobacterium bovis BCG, membrane damage
MeSH terms
THP-1 Cells, Antigens, Bacterial, Bacterial Proteins, Cell Membrane, Humans, Lipids, Macrophages, Mycobacterium bovis, Mycobacterium tuberculosis, Phagosomes, Apoptosis, Virulence Factors, Cell Line, Tumor

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