Cited by 198Legionella and Acanthamoeba researchSlime Mold and Myxomycetes ResearchAmoebic Infections and Treatments

Dictyostelium discoideum: a new host model system for intracellular pathogens of the genus Legionella

Hagele, Sonja, Kohler, Rolf, Merkert, Hilde, Schleicher, Michael, Hacker, Jorg, Steinert, Michael·2000·Cellular Microbiology

Abstract

The soil amoeba Dictyostelium discoideum is a haploid eukaryote that, upon starvation, aggregates and enters a developmental cycle to produce fruiting bodies. In this study, we infected single-cell stages of D. discoideum with different Legionella species. Intracellular growth of Legionella in this new host system was compared with their growth in the natural host Acanthamoeba castellanii. Transmission electron microscopy of infected D. discoideum cells revealed that legionellae reside within the phagosome. Using confocal microscopy, it was observed that replicating, intracellular, green fluorescent protein (GFP)-tagged legionellae rarely co-localized with fluorescent antibodies directed against the lysosomal protein DdLIMP of D. discoideum. This indicates that the bacteria inhibit the fusion of phagosomes and lysosomes in this particular host system. In addition, Legionella infection of D. discoideum inhibited the differentiation of the host into the multicellular fruiting stage. Co-culture studies with profilin-minus D. discoideum mutants and Legionella resulted in higher rates of infection when compared with infections of wild-type amoebae. Because the amoebae are amenable to genetic manipulation as a result of their haploid genome and because a number of cellular markers are available, we show for the first time that D. discoideum is a valuable model system for studying intracellular pathogenesis of microbial pathogens.

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Crossref · 10.1046/j.1462-5822.2000.00044.x

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  • Several bacterial pathogens for humans, such as legionella, mycobacteria and salmonella, are pathogenic also for Dictyostelium.

    “Several bacterial pathogens for humans, such as legionella, mycobacteria and salmonella, are pathogenic also for Dictyostelium, favouring the use of this model to study host-pathogen interactions [9-19].”

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Authors
Hagele, S., Kohler, R., Merkert, H., Schleicher, M., Hacker, J., & Steinert, M.
Affiliations
  • University of Würzburg (DE)
  • Ludwig-Maximilians-Universität München (DE)
Corresponding author
Steinert, Michael
Venue
Cellular Microbiology
Published
2000-04
Volume
2
Issue
2
Pages
165-171
ISSN
  • 1462-5814 (ISSN-L)
  • 1462-5822
OpenAlex
W2035842134
Cited by
198
References
35
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 5 · 2020: 5 · 2019: 7 · 2018: 13 · 2017: 11 · 2016: 1 · 2015: 5 · 2014: 16 · 2013: 15 · 2012: 6
FWCI
5.25
Type
journal article
Language
en
Open access
closed
Locations
  • Cellular Microbiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Endocrinology › Legionella and Acanthamoeba research
  • Physical Sciences › Engineering › Biomedical Engineering › Slime Mold and Myxomycetes Research
  • Health Sciences › Medicine › Infectious Diseases › Amoebic Infections and Treatments
Keywords
Dictyostelium discoideum, Legionella, intracellular pathogens, host-pathogen interaction, profilin, Acanthamoeba castellanii, intracellular bacterial growth
MeSH terms
Acanthamoeba, Animals, Dictyostelium, Disease Models, Animal, Flow Cytometry, Humans, Legionella, Legionellosis, In Situ Hybridization, Microscopy, Confocal

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