Source:http://linkedlifedata.com/resource/pubmed/id/18178551
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
11
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pubmed:dateCreated |
2008-3-10
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pubmed:abstractText |
Transcription factors belonging to the NF-kappaB family regulate inflammation by inducing pro-inflammatory molecules (e.g. interleukin (IL)-8) in response to cytokines (e.g. tumor necrosis factor (TNF) alpha, IL-1) or other stimuli. Several negative regulators of NF-kappaB, including the ubiquitin-editing enzyme A20, participate in the resolution of inflammatory responses. We report that Cezanne, a member of the A20 family of the deubiquitinating cysteine proteases, can be induced by TNFalpha in cultured cells. Silencing of endogenous Cezanne using small interfering RNA led to elevated NF-kappaB luciferase reporter gene activity and enhanced expression of IL-8 transcripts in TNFalpha-treated cells. Thus we conclude that endogenous Cezanne can attenuate NF-kappaB activation and the induction of pro-inflammatory transcripts in response to TNF receptor (TNFR) signaling. Overexpression studies revealed that Cezanne suppressed NF-kappaB nuclear translocation and transcriptional activity by targeting the TNFR signaling pathway at the level of the IkappaB kinase complex or upstream from it. These effects were not observed in a form of Cezanne that was mutated at the catalytic cysteine residue (Cys209), indicating that the deubiquitinating activity of Cezanne is essential for NF-kappaB regulation. Finally, we demonstrate that Cezanne can be recruited to activated TNFRs where it suppresses the build-up of polyubiquitinated RIP1 signal adapter proteins. Thus we conclude that Cezanne forms a novel negative feedback loop in pro-inflammatory signaling and that it suppresses NF-kappaB activation by targeting RIP1 signaling intermediaries for deubiquitination.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/AGFG1 protein, human,
http://linkedlifedata.com/resource/pubmed/chemical/Endopeptidases,
http://linkedlifedata.com/resource/pubmed/chemical/Interleukin-8,
http://linkedlifedata.com/resource/pubmed/chemical/Intracellular Signaling Peptides...,
http://linkedlifedata.com/resource/pubmed/chemical/Lysine,
http://linkedlifedata.com/resource/pubmed/chemical/NF-kappa B,
http://linkedlifedata.com/resource/pubmed/chemical/Nuclear Pore Complex Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Nuclear Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/OTUD7B protein, human,
http://linkedlifedata.com/resource/pubmed/chemical/RNA-Binding Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Receptors, Tumor Necrosis Factor,
http://linkedlifedata.com/resource/pubmed/chemical/TNFAIP3 protein, human,
http://linkedlifedata.com/resource/pubmed/chemical/Ubiquitin
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pubmed:status |
MEDLINE
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pubmed:month |
Mar
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pubmed:issn |
0021-9258
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
14
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pubmed:volume |
283
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
7036-45
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pubmed:dateRevised |
2010-9-20
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pubmed:meshHeading |
pubmed-meshheading:18178551-Endopeptidases,
pubmed-meshheading:18178551-Endothelial Cells,
pubmed-meshheading:18178551-Gene Expression Regulation, Enzymologic,
pubmed-meshheading:18178551-Humans,
pubmed-meshheading:18178551-Inflammation,
pubmed-meshheading:18178551-Interleukin-8,
pubmed-meshheading:18178551-Intracellular Signaling Peptides and Proteins,
pubmed-meshheading:18178551-Lysine,
pubmed-meshheading:18178551-Models, Biological,
pubmed-meshheading:18178551-Mutation,
pubmed-meshheading:18178551-NF-kappa B,
pubmed-meshheading:18178551-Nuclear Pore Complex Proteins,
pubmed-meshheading:18178551-Nuclear Proteins,
pubmed-meshheading:18178551-RNA-Binding Proteins,
pubmed-meshheading:18178551-Receptors, Tumor Necrosis Factor,
pubmed-meshheading:18178551-Signal Transduction,
pubmed-meshheading:18178551-Ubiquitin
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pubmed:year |
2008
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pubmed:articleTitle |
NF-kappaB suppression by the deubiquitinating enzyme Cezanne: a novel negative feedback loop in pro-inflammatory signaling.
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pubmed:affiliation |
British Heart Foundation Cardiovascular Sciences Unit, National Heart and Lung Institute, Imperial College London, London W12 ONN, United Kingdom.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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