UNIGE document Scientific Article
previous document  unige:103007  next document
add to browser collection
Title

Eat Prey, Live: Dictyostelium discoideum As a Model for Cell-Autonomous Defenses

Authors
Lefrançois, Louise H
López-Jiménez, Ana Teresa
Published in Frontiers in Immunology. 2018, vol. 8, no. 1906
Abstract The soil-dwelling social amoebaDictyostelium discoideumfeeds on bacteria. Each meal is a potential infection because some bacteria have evolved mechanisms to resist predation. To survive such a hostile environment,D. discoideumhas in turn evolved efficient antimicrobial responses that are intertwined with phagocytosis and autophagy, its nutrient acquisition pathways. The core machinery and antimicrobial functions of these pathways are conserved in the mononuclear phagocytes of mammals, which mediate the initial, innate-immune response to infection. In this review, we discuss the advantages and relevance ofD. discoideumas a model phagocyte to study cell-autonomous defenses. We cover the antimicrobial functions of phagocytosis and autophagy and describe the processes that create a microbicidal phagosome: acidification and delivery of lytic enzymes, generation of reactive oxygen species, and the regulation of Zn2+, Cu2+, and Fe2+availability. High concentrations of metals poison microbes while metal sequestration inhibits their metabolic activity. We also describe microbial interference with these defenses and highlight observations made first inD. discoideum. Finally, we discuss galectins, TNF receptor-associated factors, tripartite motif-containing proteins, and signal transducers and activators of transcription, microbial restriction factors initially characterized in mammalian phagocytes that have either homologs or functional analogs inD. discoideum.
Identifiers
PMID: 29354124
Full text
Article (Published version) (9.3 MB) - public document Free access
Structures
Citation
(ISO format)
DUNN, Joe Dan et al. Eat Prey, Live: Dictyostelium discoideum As a Model for Cell-Autonomous Defenses. In: Frontiers in Immunology, 2018, vol. 8, n° 1906. https://archive-ouverte.unige.ch/unige:103007

65 hits

19 downloads

Update

Deposited on : 2018-03-19

Export document
Format :
Citation style :