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Canavan, Mary; McCarthy, Ciara; Larbi, Nadia Ben; Dowling, Jennifer K; Collins, Laura; O’Sullivan, Finbarr; Hurley, Grainne; Murphy, Carola; Quinlan, Aoife; Moloney, Gerry; Darby, Trevor; MacSharry, John; Kagechika, Hiroyuki; Moynagh, Paul; Melgar, Silvia; Loscher, Christine E

Activation of liver X receptor suppresses the production of the IL-12 family of cytokines by blocking nuclear translocation of NF-κBp50

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  • Media type: E-Article
  • Title: Activation of liver X receptor suppresses the production of the IL-12 family of cytokines by blocking nuclear translocation of NF-κBp50
  • Contributor: Canavan, Mary; McCarthy, Ciara; Larbi, Nadia Ben; Dowling, Jennifer K; Collins, Laura; O’Sullivan, Finbarr; Hurley, Grainne; Murphy, Carola; Quinlan, Aoife; Moloney, Gerry; Darby, Trevor; MacSharry, John; Kagechika, Hiroyuki; Moynagh, Paul; Melgar, Silvia; Loscher, Christine E
  • imprint: SAGE Publications, 2014
  • Published in: Innate Immunity
  • Language: English
  • DOI: 10.1177/1753425913501915
  • ISSN: 1753-4267; 1753-4259
  • Keywords: Infectious Diseases ; Cell Biology ; Molecular Biology ; Immunology ; Microbiology
  • Origination:
  • Footnote:
  • Description: <jats:p> There is now convincing evidence that liver X receptor (LXR) is an important modulator of the inflammatory response; however, its mechanism of action remains unclear. This study aimed to examine the effect of LXR on the IL-12 family of cytokines and examined the mechanism by which LXR exerted this effect. We first demonstrated that activation of murine-derived dendritic cells (DC) with a specific agonist to LXR enhanced expression of LXR following activation with LPS, suggesting a role in inflammation. Furthermore, we showed LXR expression to be increased in vivo in dextrane sulphate sodium-induced colitis. LXR activation also suppressed production of IL-12p40, IL-12p70, IL-27 and IL-23 in murine-derived DC following stimulation with LPS, and specifically targeted the p35, p40 and EBI3 subunits of the IL-12 cytokine family, which are under the control of the NF-κB subunit p50 (NF-κBp50). Finally, we demonstrated that LXR can associate with NF-κBp50 in DC and that LXR activation prevents translocation of the p50 subunit into the nucleus. In summary, our study indicates that LXR can specifically suppress the IL-12 family of cytokines though its association with NF-κBp50 and highlights its potential as a therapeutic target for chronic inflammatory diseases. </jats:p>
  • Access State: Open Access