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

Dunn, Joe Dan; Bosmani, Cristina; Barisch, Caroline; Raykov, Lyudmil; Lefrançois, Louise H; Cardenal-Munoz, Elena; López-Jiménez, Ana Teresa; Soldati, Thierry

doi:10.3389/fimmu.2017.01906

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Title		Eat Prey, Live: Dictyostelium discoideum As a Model for Cell-Autonomous Defenses
Authors		Dunn, Joe Dan Bosmani, Cristina Barisch, Caroline Raykov, Lyudmil Lefrançois, Louise H Cardenal-Munoz, Elena López-Jiménez, Ana Teresa Soldati, Thierry
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		DOI: 10.3389/fimmu.2017.01906 PMID: 29354124
Full text		Article (Published version) (9.3 MB) - Free access
Structures		Faculté des sciences / Section de chimie et biochimie / Département de biochimie
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. doi: 10.3389/fimmu.2017.01906 https://archive-ouverte.unige.ch/unige:103007