Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2008-3-10
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.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
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
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
14
pubmed:volume
283
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
7036-45
pubmed:dateRevised
2010-9-20
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
pubmed:year
2008
pubmed:articleTitle
NF-kappaB suppression by the deubiquitinating enzyme Cezanne: a novel negative feedback loop in pro-inflammatory signaling.
pubmed:affiliation
British Heart Foundation Cardiovascular Sciences Unit, National Heart and Lung Institute, Imperial College London, London W12 ONN, United Kingdom.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't