Cited by 729Inflammasome and immune disordersImmune Response and InflammationInflammation biomarkers and pathways

TRIF Licenses Caspase-11-Dependent NLRP3 Inflammasome Activation by Gram-Negative Bacteria

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Rathinam, Vijay A.K., Vanaja, Sivapriya Kailasan, Waggoner, Lisa, Sokolovska, Anna, Becker, Christine, Stuart, Lynda M., Leong, John M., Fitzgerald, Katherine A.·2012·Cell

Abstract

Systemic infections with Gram-negative bacteria are characterized by high mortality rates due to the "sepsis syndrome," a widespread and uncontrolled inflammatory response. Though it is well recognized that the immune response during Gram-negative bacterial infection is initiated after the recognition of endotoxin by Toll-like receptor 4, the molecular mechanisms underlying the detrimental inflammatory response during Gram-negative bacteremia remain poorly defined. Here, we identify a TRIF pathway that licenses NLRP3 inflammasome activation by all Gram-negative bacteria. By engaging TRIF, Gram-negative bacteria activate caspase-11. TRIF activates caspase-11 via type I IFN signaling, an event that is both necessary and sufficient for caspase-11 induction and autoactivation. Caspase-11 subsequently synergizes with the assembled NLRP3 inflammasome to regulate caspase-1 activation and leads to caspase-1-independent cell death. These events occur specifically during infection with Gram-negative, but not Gram-positive, bacteria. The identification of TRIF as a regulator of caspase-11 underscores the importance of TLRs as master regulators of inflammasomes during Gram-negative bacterial infection.

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Crossref · 10.1016/j.cell.2012.07.007

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  • Type I IFN and IFNG contribute to pyroptosis by promoting transactivation of CASP11 through an IFNAR1-dependent or IFNGR1-dependent mechanism initiated by TLR4 or IL18 signaling.

    “type I IFN and IFN gamma (IFNG) also contribute to pyroptosis by promoting: (1) the transactivation of CASP11, through an IFNAR1-dependent or IFNGR1-dependent mechanism initiated by TLR4 or IL18 signaling [620, 643, 644]”

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Authors
Rathinam, V. A. K., Vanaja, S. K., Waggoner, L., Sokolovska, A., Becker, C., Stuart, L. M., Leong, J. M., & Fitzgerald, K. A.
Affiliations
  • University of Massachusetts Chan Medical School (US)
  • Tufts University (US)
  • Harvard University (US)
Corresponding author
Fitzgerald, Katherine A.
Venue
Cell
Publisher
Elsevier BV
Published
2012-08
Volume
150
Issue
3
Pages
606-619
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2007747853
Cited by
729
References
46
Citations by year
2026: 31 · 2025: 31 · 2024: 27 · 2023: 52 · 2022: 39 · 2021: 46 · 2020: 59 · 2019: 53 · 2018: 60 · 2017: 51 · 2016: 61 · 2015: 73 · 2014: 62 · 2013: 74 · 2012: 9
FWCI
27.85
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship@UMassChan (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute of Allergy and Infectious Diseases (R01AI079198, AI046454, AI079198, AI083713, U54AI057159, R01AI046454, R01AI083713)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK043351)
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 › Immunology and Microbiology › Immunology › Inflammation biomarkers and pathways
Keywords
TRIF, caspase-11, NLRP3 inflammasome, Gram-negative bacteria, sepsis, type I interferon signaling, caspase-1 activation, Toll-like receptors, bacterial infection
MeSH terms
NLR Family, Pyrin Domain-Containing 3 Protein, Animals, Carrier Proteins, Gram-Negative Bacteria, Gram-Positive Bacteria, Interferons, Signal Transduction, Caspases, Adaptor Proteins, Vesicular Transport, Citrobacter rodentium, Mice, Caspases, Initiator, Enterohemorrhagic Escherichia coli, Inflammasomes

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