Cited by 539Inflammasome and immune disordersImmune Response and InflammationSalmonella and Campylobacter epidemiology

Caspase-11 increases susceptibility to Salmonella infection in the absence of caspase-1

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Broz, Petr, Ruby, Thomas, Belhocine, Kamila, Bouley, Donna M., Kayagaki, Nobuhiko, Dixit, Vishva M., Monack, Denise M.·2012·Nature

Abstract

Inflammasomes are cytosolic multiprotein complexes assembled by intracellular nucleotide-binding oligomerization domain (NOD)-like receptors (NLRs) and they initiate innate immune responses to invading pathogens and danger signals by activating caspase-1 (ref. 1). Caspase-1 activation leads to the maturation and release of the pro-inflammatory cytokines interleukin (IL)-1β and IL-18, as well as lytic inflammatory cell death known as pyroptosis. Recently, a new non-canonical inflammasome was described that activates caspase-11, a pro-inflammatory caspase required for lipopolysaccharide-induced lethality. This study also highlighted that previously generated caspase-1 knockout mice lack a functional allele of Casp11 (also known as Casp4), making them functionally Casp1 Casp11 double knockouts. Previous studies have shown that these mice are more susceptible to infections with microbial pathogens, including the bacterial pathogen Salmonella enterica serovar Typhimurium (S. typhimurium), but the individual contributions of caspase-1 and caspase-11 to this phenotype are not known. Here we show that non-canonical caspase-11 activation contributes to macrophage death during S. typhimurium infection. Toll-like receptor 4 (TLR4)-dependent and TIR-domain-containing adaptor-inducing interferon-β (TRIF)-dependent interferon-β production is crucial for caspase-11 activation in macrophages, but is only partially required for pro-caspase-11 expression, consistent with the existence of an interferon-inducible activator of caspase-11. Furthermore, Casp1(-/-) mice were significantly more susceptible to infection with S. typhimurium than mice lacking both pro-inflammatory caspases (Casp1(-/-) Casp11(-/-)). This phenotype was accompanied by higher bacterial counts, the formation of extracellular bacterial microcolonies in the infected tissue and a defect in neutrophil-mediated clearance. These results indicate that caspase-11-dependent cell death is detrimental to the host in the absence of caspase-1-mediated innate immunity, resulting in extracellular replication of a facultative intracellular bacterial pathogen.

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Authors
Broz, P., Ruby, T., Belhocine, K., Bouley, D. M., Kayagaki, N., Dixit, V. M., & Monack, D. M.
Affiliations
  • Stanford Medicine (US)
  • Genentech (US)
Corresponding author
Monack, Denise M.
Venue
Nature
Published
2012-08-15
Volume
490
Issue
7419
Pages
288-291
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2024591203
Cited by
535
References
23
Citations by year
2026: 13 · 2025: 25 · 2024: 20 · 2023: 35 · 2022: 33 · 2021: 31 · 2020: 47 · 2019: 40 · 2018: 38 · 2017: 40 · 2016: 51 · 2015: 49 · 2014: 53 · 2013: 53 · 2012: 6
FWCI
20.71
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
National Institute of Allergy and Infectious Diseases (F32AI008972, AI095396, R01AI089722, AI08972, R01AI095396)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Salmonella and Campylobacter epidemiology
Keywords
caspase-11, caspase-1, Salmonella typhimurium, non-canonical inflammasome, macrophage cell death, pyroptosis, bacterial dissemination, innate immunity, TLR4, TRIF, NOD2, NOD-like receptors, IL-1β, IL-18
MeSH terms
Adjuvants, Immunologic, Animals, Cells, Cultured, Disease Susceptibility, Gene Expression Regulation, Interferon-gamma, Lipopolysaccharides, Macrophages, Salmonella Infections, Animal, Salmonella typhimurium, Signal Transduction, Cell Death, Mice, Knockout, Caspases, Mice, Caspases, Initiator, Inflammasomes

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