Cited by 6,066Inflammasome and immune disordersImmune Response and InflammationCell death mechanisms and regulation

The Inflammasome

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Martinon, Fabio, Burns, Kimberly, Tschopp, Jürg·2002·Molecular Cell

Abstract

Generation of Interleukin (IL)-1beta via cleavage of its proform requires the activity of caspase-1 (and caspase-11 in mice), but the mechanism involved in the activation of the proinflammatory caspases remains elusive. Here we report the identification of a caspase-activating complex that we call the inflammasome. The inflammasome comprises caspase-1, caspase-5, Pycard/Asc, and NALP1, a Pyrin domain-containing protein sharing structural homology with NODs. Using a cell-free system, we show that proinflammatory caspase activation and proIL-1beta processing is lost upon prior immunodepletion of Pycard. Moreover, expression of a dominant-negative form of Pycard in differentiated THP-1 cells blocks proIL-1beta maturation and activation of inflammatory caspases induced by LPS in vivo. Thus, the inflammasome constitutes an important arm of the innate immunity.

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Crossref · 10.1016/s1097-2765(02)00599-3

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  • Caspase-1, activated inside the inflammasome, cleaves proIL-1β to yield mature IL-1β.

    “Mature IL-1β is produced by cleavage of the inactive proIL-1β precursor by caspase-1, which is activated within a large multi-protein complex, termed the inflammasome (8).”
  • The Nalp3 inflammasome contains Nalp3, Cardinal, ASC, and caspase-1, and has been linked to mature IL-1β generation after diverse stimuli.

    “The Nalp3 inflammasome, composed of the Nod-like receptor (NLR) protein Nalp3 (Cryopyrin/NLRP3), Cardinal, the adaptor ASC and caspase-1, is implicated in the production of mature IL-1β in response to a variety of signals.”
  • Caspase-1 belongs to the inflammatory caspases and leads to the processing and secretion of IL-1β and IL-18 into their active forms.

    “Caspase-1 belongs to the inflammatory caspases and leads to the processing and secretion of the pro-inflammatory cytokines interleukin-1 beta (IL-1β) and IL-18 into their active forms (21).”
  • The inflammasome is a high-molecular-weight complex present in the cytosol of immune cells.

    “Among the different types of PRRs, the newest described is the inflammasome, a high-molecular-weight complex, present in the cytosol of immune cells [132].”

    From P2X7 Receptor Signaling in Stress and Depression (2019) · cites this paper as [132]

  • Caspase-1 requires cleavage from pro-caspase-1 via formation of a multimeric protein complex termed the inflammasome.

    “Caspase-1 is also regulated in a similar manner and requires cleavage from pro-caspase-1.This occurs via the formation of a multimeric protein complex termed the inflammasome.”

    From Repeated Social Defeat, Neuroinflammation, and Behavior: Monocytes Carry the Signal (2017) · cites this paper as Martinon et al, 2002

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Authors
Martinon, F., Burns, K., & Tschopp, J.
Affiliations
University of Lausanne (CH)
Corresponding author
Tschopp, Jürg
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2002-08
Volume
10
Issue
2
Pages
417-426
ISSN
1097-2765 (ISSN-L)
OpenAlex
W1529674879
Cited by
6,066
References
49
Citations by year
2026: 260 · 2025: 343 · 2024: 431 · 2023: 450 · 2022: 466 · 2021: 417 · 2020: 457 · 2019: 397 · 2018: 315 · 2017: 315 · 2016: 285 · 2015: 300 · 2014: 256 · 2013: 230 · 2012: 200
FWCI
16.27
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • IRIS (submittedVersion)
  • SERVAL (Université de Lausanne) (submittedVersion)
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 › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
inflammasome, caspase-1, caspase-5, PYCARD, ASC, NALP1, interleukin-1β processing, caspase activation, innate immunity, pyrin domain, THP-1 cells, lipopolysaccharide, dominant-negative mutant
MeSH terms
NLR Proteins, Cell Line, Cell-Free System, Cytoskeletal Proteins, Enzyme Activation, HeLa Cells, Humans, Inflammation, Interleukin-1, Lipopolysaccharides, Protein Precursors, Protein Processing, Post-Translational, Proteins, Blotting, Western, Caspases, Caspase 1, Macromolecular Substances, Adaptor Proteins, Signal Transducing, Apoptosis Regulatory Proteins, CARD Signaling Adaptor Proteins

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