Cited by 2,627Inflammasome and immune disordersinterferon and immune responsesImmune Response and Inflammation

AIM2 recognizes cytosolic dsDNA and forms a caspase-1-activating inflammasome with ASC

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Hornung, Veit, Ablasser, Andrea, Charrel-Dennis, Marie, Bauernfeind, Franz, Horvath, Gabor, Caffrey, Daniel. R., Latz, Eicke, Fitzgerald, Katherine A.·2009·Nature

Abstract

The innate immune system senses nucleic acids by germline-encoded pattern recognition receptors. RNA is sensed by Toll-like receptor members TLR3, TLR7 and TLR8, or by the RNA helicases RIG-I (also known as DDX58) and MDA-5 (IFIH1). Little is known about sensors for cytoplasmic DNA that trigger antiviral and/or inflammatory responses. The best characterized of these responses involves activation of the TANK-binding kinase (TBK1)-interferon regulatory factor 3 (IRF3) signalling axis to trigger transcriptional induction of type I interferon genes. A second, less well-defined pathway leads to the activation of an 'inflammasome' that, via caspase-1, controls the catalytic cleavage of the pro-forms of the cytokines IL1beta and IL18 (refs 6, 7). Using mouse and human cells, here we identify the PYHIN (pyrin and HIN domain-containing protein) family member absent in melanoma 2 (AIM2) as a receptor for cytosolic DNA, which regulates caspase-1. The HIN200 domain of AIM2 binds to DNA, whereas the pyrin domain (but not that of the other PYHIN family members) associates with the adaptor molecule ASC (apoptosis-associated speck-like protein containing a caspase activation and recruitment domain) to activate both NF-kappaB and caspase-1. Knockdown of Aim2 abrogates caspase-1 activation in response to cytoplasmic double-stranded DNA and the double-stranded DNA vaccinia virus. Collectively, these observations identify AIM2 as a new receptor for cytoplasmic DNA, which forms an inflammasome with the ligand and ASC to activate caspase-1.

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  • AIM2 has a pyrin domain that allows it to interact with the adaptor protein ASC to form the inflammasome.

    “Although distinct from NLRs, AIM2 has a pyrin domain that allows it to interact with the adaptor protein ASC (apoptosis-associated speck-like protein containing a CARD) to form the inflammasome50.”

    From Sterile inflammation: sensing and reacting to damage (2010) · cites this paper as [50]

  • The AIM2 inflammasome has been shown to recognize cytoplasmic double-stranded DNA (dsDNA) that is not necessarily microbial in origin, resulting in caspase 1 activation and IL-1β secretion.

    “The AIM2 inflammasome has been recently shown to recognize cytoplasmic double-stranded DNA (dsDNA) that is not necessarily microbial in origin, resulting in caspase 1 activation and IL-1β secretion48–50.”

    From Sterile inflammation: sensing and reacting to damage (2010) · cites this paper as [50]

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Authors
Hornung, V., Ablasser, A., Charrel-Dennis, M., Bauernfeind, F., Horvath, G., Caffrey, D. R., Latz, E., & Fitzgerald, K. A.
Affiliations
  • University of Massachusetts Chan Medical School (US)
  • Pfizer (United States) (US)
Corresponding author
  • Hornung, Veit
  • Fitzgerald, Katherine A.
Venue
Nature
Published
2009-01-21
Volume
458
Issue
7237
Pages
514-518
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2042816890
Cited by
2,627
References
30
Citations by year
2026: 108 · 2025: 164 · 2024: 187 · 2023: 152 · 2022: 168 · 2021: 162 · 2020: 158 · 2019: 146 · 2018: 142 · 2017: 137 · 2016: 142 · 2015: 144 · 2014: 147 · 2013: 168 · 2012: 140
FWCI
66.64
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • The Journal of the American Medical Association (JAMA) Network (American Medical Association) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Funders
National Institute of Allergy and Infectious Diseases (AI065483, R01AI067497, R37AI067497, AI-067497, R01AI065483, R56AI067497)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
AIM2, cytosolic DNA sensing, inflammasome, caspase-1 activation, ASC, pyrin domain, double-stranded DNA, vaccinia virus, NF-κB activation, innate immunity, autoinflammation, autoimmunity, IL-1β, IL-18
MeSH terms
Animals, Cell Line, Cytoskeletal Proteins, Cytosol, DNA, DNA-Binding Proteins, Enzyme Activation, Humans, Inflammation, Nuclear Proteins, Poly dA-dT, Protein Binding, Vaccinia virus, Cell Death, Caspase 1, Apoptosis Regulatory Proteins, Mice, CARD Signaling Adaptor Proteins

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