Cited by 1,344Immune Response and InflammationGenomics and Chromatin DynamicsImmune responses and vaccinations

Gene-specific control of inflammation by TLR-induced chromatin modifications

Foster, Simmie L., Hargreaves, Diana C., Medzhitov, Ruslan·2007·Nature

Abstract

Toll-like receptors (TLRs) induce a multi-component inflammatory response that must be tightly regulated to avoid tissue damage. Most known regulatory mechanisms target TLR signalling pathways and thus broadly inhibit multiple aspects of the inflammatory response. Given the functional diversity of TLR-induced genes, we proposed that additional, gene-specific regulatory mechanisms exist to allow individual aspects of the TLR-induced response to be differentially regulated. Using an in vitro system of lipopolysaccharide tolerance in murine macrophages, we show that TLR-induced genes fall into two categories on the basis of their functions and regulatory requirements. We demonstrate that representatives from the two classes acquire distinct patterns of TLR-induced chromatin modifications. These gene-specific chromatin modifications are associated with transient silencing of one class of genes, which includes pro-inflammatory mediators, and priming of the second class, which includes antimicrobial effectors. These findings illustrate an adaptive response in macrophages and reveal component-specific regulation of inflammation.

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Crossref · 10.1038/nature05836

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  • LPS-stimulated classically activated macrophages become TLR-tolerant and unable to produce similarly elevated pro-inflammatory cytokines upon second LPS exposure, but retain ability to produce anti-inflammatory cytokines like IL-10.

    “For example, in vitro experiments have shown that LPS stimulated, classically activated macrophages, become Toll-like receptor (TLR)-tolerant and unable to produce similarly elevated levels of pro-inflammatory cytokines upon second exposure to LPS [16–18].”

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Authors
Foster, S. L., Hargreaves, D. C., & Medzhitov, R.
Affiliations
Howard Hughes Medical Institute (US)
Corresponding author
Medzhitov, Ruslan
Venue
Nature
Published
2007-05-30
Volume
447
Issue
7147
Pages
972-978
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2041308303
Cited by
1,344
References
1
Citations by year
2026: 63 · 2025: 81 · 2024: 73 · 2023: 69 · 2022: 75 · 2021: 96 · 2020: 86 · 2019: 75 · 2018: 75 · 2017: 50 · 2016: 80 · 2015: 60 · 2014: 78 · 2013: 71 · 2012: 57
FWCI
23.69
Type
journal article
Language
en
Update notices
erratum (2008-01-03)
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
Keywords
Toll-like receptors, chromatin modification, gene-specific regulation, inflammation, lipopolysaccharide tolerance, macrophages, gene silencing, transcriptional priming, pro-inflammatory mediators, adaptive immunity
MeSH terms
Animals, Cells, Cultured, Chromatin, Gene Expression Regulation, Histones, Inflammation, Lipopolysaccharides, Macrophages, Models, Genetic, Promoter Regions, Genetic, Transcription, Genetic, Chromatin Assembly and Disassembly, Toll-Like Receptor 4, Mice

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