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Molecular Cell
Article
License: Elsevier Non-Commercial
Data sources: UnpayWall
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Molecular Cell
Article . 2009
License: Elsevier Non-Commercial
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Molecular Cell
Article . 2009 . Peer-reviewed
License: Elsevier Non-Commercial
Data sources: Crossref
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Transcriptional Integration of TLR2 and TLR4 Signaling at the NCoR Derepression Checkpoint

Authors: Huang W; Ghisletti S; Perissi V; Rosenfeld MG; Glass CK;

Transcriptional Integration of TLR2 and TLR4 Signaling at the NCoR Derepression Checkpoint

Abstract

Activation of toll-like receptors (TLRs) leads to derepression and subsequent activation of inflammatory response genes that play essential roles in innate and acquired immunity. Derepression requires signal-dependent turnover of the nuclear receptor corepressor NCoR from target promoters, but the mechanisms remain poorly understood. Here, we report that TLR4 uses NFkappaB to deliver IKKepsilon to target promoters that contain "integrated circuits" of kappaB and AP-1 sites, resulting in local phosphorylation of c-Jun and subsequent NCoR clearance. In contrast, TLR2 signaling leads to rapid activation of CaMKII and phosphorylation of the TBLR1 component of NCoR complexes, bypassing the requirement for c-Jun phosphorylation and enabling NCoR clearance from promoters lacking integrated kappaB elements. Intriguingly, the IKKvarepsilon-dependent clearance pathway is sensitive to transrepression by liver X receptors, while the CaMKII-dependent pathway is not. These findings reveal mechanisms for integration of TLR, calcium, and nuclear receptor signaling pathways that underlie pathogen-specific responses and disease-specific programs of inflammation.

Keywords

Lipopolysaccharides, Chromatin Immunoprecipitation, Immunoblotting, Receptors, Cytoplasmic and Nuclear, Cell Line, Lipopeptides, Mice, Animals, Nuclear Receptor Co-Repressor 1, Nuclear Receptor Co-Repressor 2, Phosphorylation, Molecular Biology, Cells, Cultured, Liver X Receptors, PROTEINS; RNA, Nuclear Proteins, Cell Biology, Orphan Nuclear Receptors, DNA-Binding Proteins, Mice, Inbred C57BL, Mutation, RNA Interference, Calcium-Calmodulin-Dependent Protein Kinase Type 2

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
100
Top 10%
Top 10%
Top 1%
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hybrid