Cited by 702Inflammasome and immune disordersinterferon and immune responsesViral-associated cancers and disorders

IFI16 Acts as a Nuclear Pathogen Sensor to Induce the Inflammasome in Response to Kaposi Sarcoma-Associated Herpesvirus Infection

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Kerur, Nagaraj, Veettil, Mohanan Valiya, Sharma-Walia, Neelam, Bottero, Virginie, Sadagopan, Sathish, Otageri, Pushpalatha, Chandran, Bala·2011·Cell Host & Microbe

Abstract

Inflammasomes are cytoplasmic sensors of foreign molecules, including pathogens, and function to induce caspase-1 activation and IL-1β cytokine maturation. Whether such a mechanism exists in the nucleus and is effective against nuclear replicating pathogens is unknown. Nuclear replicating herpesvirus KSHV is associated with Kaposi Sarcoma, an angioproliferative tumor characterized by an inflammatory microenvironment including IL-1β. We demonstrate that during KSHV infection of endothelial cells, interferon gamma-inducible protein 16 (IFI16) interacts with the adaptor molecule ASC and procaspase-1 to form a functional inflammasome. This complex was initially detected in the nucleus and subsequently in the perinuclear area. KSHV gene expression and/or latent KSHV genome is required for inflammasome activation and IFI16 colocalizes with the KSHV genome in the infected cell nucleus. Caspase-1 activation by KSHV was reduced by IFI16 and ASC silencing. Our studies reveal IFI16 as a nuclear pathogen sensor and demonstrate that the inflammasome also functions in the nucleus.

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Crossref · 10.1016/j.chom.2011.04.008

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Authors
Kerur, N., Veettil, M. V., Sharma-Walia, N., Bottero, V., Sadagopan, S., Otageri, P., & Chandran, B.
Affiliations
Rosalind Franklin University of Medicine and Science (US)
Corresponding author
Chandran, Bala
Venue
Cell Host & Microbe
Publisher
Elsevier BV
Published
2011-05
Volume
9
Issue
5
Pages
363-375
ISSN
1931-3128 (ISSN-L)
OpenAlex
W2083093678
Cited by
702
References
35
Citations by year
2026: 14 · 2025: 30 · 2024: 37 · 2023: 36 · 2022: 55 · 2021: 45 · 2020: 45 · 2019: 63 · 2018: 45 · 2017: 49 · 2016: 55 · 2015: 66 · 2014: 47 · 2013: 63 · 2012: 31
FWCI
20.76
Type
journal article
Language
en
Open access
Locations
  • Cell Host & Microbe (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Rosalind Franklin University of Medicine and Science
  • National Cancer Institute (R01CA099925, CA099925, R01CA075911)
  • National Institute of Allergy and Infectious Diseases (AI057349, R01AI057349)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Health Sciences › Medicine › Oncology › Viral-associated cancers and disorders
Keywords
IFI16, inflammasome, Kaposi's sarcoma-associated herpesvirus, caspase-1 activation, ASC, IL-1β, herpesvirus latency, endothelial cells, Kaposi's sarcoma
MeSH terms
Cells, Cultured, Humans, Nuclear Proteins, Phosphoproteins, Protein Binding, Herpesvirus 8, Human, Protein Interaction Mapping, Endothelial Cells, Inflammasomes

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