Salmonella and the Inflammasome: Battle for Intracellular Dominance
Inflammasomes are macromolecular cytoplasmic complexes that act as signaling platforms for the activation of inflammatory caspases. Their activation triggers the processing and secretion of the pro-inflammatory cytokines IL-1β and IL-18, as well as the in
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Abstract Inflammasomes are macromolecular cytoplasmic complexes that act as signaling platforms for the activation of inflammatory caspases. Their activation triggers the processing and secretion of the pro-inflammatory cytokines IL-1β and IL-18, as well as the induction of a specialized form of inflammatory cell death termed pyroptosis. Here, we review the mechanisms of inflammasome activation triggered by the intracellular pathogen Salmonella enterica serovar Typhimurium. We highlight the different inflammasome subfamilies utilized by macrophages, neutrophils, dendritic cells, and intestinal epithelial cells response to a Salmonella infection as well as the Salmonella ligands that trigger each inflammasome’s formation. We also discuss the evasion strategies utilized by Salmonella to avoid inflammasome detection. Overall, inflammasomes play a key and multilayered role at distinct stages of host cell defense against Salmonella infection.
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1 Introduction.................................................................................................................... 1.1 Salmonella .................................................................................................................. 1.2 Inflammasomes ........................................................................................................... 2 Salmonella and the Immune Cell Inflammasome......................................................... 2.1 Macrophages ............................................................................................................... 2.2 Dendritic Cells (DCs) ................................................................................................. 2.3 Neutrophils..................................................................................................................
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S.M. Crowley B.A. Vallance (&) Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, University of British Columbia, Vancouver, BC V6H 3V4, Canada e-mail: [email protected] L.A. Knodler Paul G. Allen School for Global Animal Health, College of Veterinary Medicine, Washington State University, Pullman, WA 99164-7090, USA © Springer International Publishing Switzerland 2016 S. Backert (ed.), Inflammasome Signaling and Bacterial Infections, Current Topics in Microbiology and Immunology 397, DOI 10.1007/978-3-319-41171-2_3
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S.M. Crowley et al. 3 Salmonella and the Intestinal Epithelial Inflammasome............................................... 4 Inflammasome Evasion by Salmonella ......................................................................... 5 Concluding Remarks .....................................................................................................
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References ..................................................................................................................................
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1 Introduction 1.1
Salmonella
Salmonella is a genus of pathogenic, motile, Gram-negative bacteria that are
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