Commensal anaerobic gut bacteria attenuate inflammation by regulating nuclear-cytoplasmic shuttling of PPAR-gamma and RelA - PubMed (original) (raw)
doi: 10.1038/ni1018. Epub 2003 Dec 21.
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- PMID: 14691478
- DOI: 10.1038/ni1018
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Commensal anaerobic gut bacteria attenuate inflammation by regulating nuclear-cytoplasmic shuttling of PPAR-gamma and RelA
Denise Kelly et al. Nat Immunol. 2004 Jan.
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Abstract
The human gut microflora is important in regulating host inflammatory responses and in maintaining immune homeostasis. The cellular and molecular bases of these actions are unknown. Here we describe a unique anti-inflammatory mechanism, activated by nonpathogenic bacteria, that selectively antagonizes transcription factor NF-kappaB. Bacteroides thetaiotaomicron targets transcriptionally active NF-kappaB subunit RelA, enhancing its nuclear export through a mechanism independent of nuclear export receptor Crm-1. Peroxisome proliferator activated receptor-gamma (PPAR-gamma), in complex with nuclear RelA, also undergoes nucleocytoplasmic redistribution in response to B. thetaiotaomicron. A decrease in PPAR-gamma abolishes both the nuclear export of RelA and the anti-inflammatory activity of B. thetaiotaomicron. This PPAR-gamma-dependent anti-inflammatory mechanism defines new cellular targets for therapeutic drug design and interventions for the treatment of chronic inflammation.
Comment in
- ComPPARtmentalizing NF-kappaB in the gut.
Beg AA. Beg AA. Nat Immunol. 2004 Jan;5(1):14-6. doi: 10.1038/ni0104-14. Nat Immunol. 2004. PMID: 14699401 No abstract available.
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