Search Organism: All OrganismsArabidopsis thalianaBacillus subtilis 168Bos taurusCaenorhabditis elegansCanis familiarisDanio rerioDrosophila melanogasterEquus caballusEscherichia coli K12Gallus gallusHomo sapiensMacaca mulattaMus musculusNematostella vectensisOryza sativaPan troglodytesRattus norvegicusSaccharomyces cerevisiaeSchizosaccharomyces pombeStrongylocentrotus purpuratusTakifugu rubripesXenopus laevis home help / support contribute downloads mirrors about us J. Clin. Invest. Feb (2002); 109(3):419-25 The Fas-associated death domain protein suppresses activation of NF-kappa B by LPS and IL-1 beta. Bannerman DD, Tupper JC, Kelly JD, Winn RK, Harlan JM Department of Surgery, University of Washington School of Medicine, Seattle, Washington, USA. dbannerm@u.washington.edu Abstract: Activation of NF-kappa B by bacterial LPS promotes the upregulation of proinflammatory cytokines that contribute to the pathogenesis of Gram-negative septic shock. LPS activation of NF-kappa B is dependent upon the interaction of two death domain-containing (DD-containing) proteins, MyD88 and IL-1 receptor-associated kinase IRAK. Another DD-containing protein, Fas-associated death domain (FADD), also binds MyD88 through respective DD-DD interactions. Although FADD has been classically described as a proapoptotic signaling molecule, several reports have implicated a role for FADD in mediating NF-kappa B activation. In the present report, we investigated whether FADD could mediate LPS activation of NF-kappa B. Overexpression of FADD blocked LPS-induced NF-kappa B activation, whereas absence of FADD enhanced activation of NF-kappa B by LPS. Further, LPS-induced expression of two NF-kappa B-dependent gene products, IL-6 and KC, was enhanced in FADD(-/-) mouse embryo fibroblasts (MEFs) compared with wild-type. This increase in NF-kappa B activity correlated with enhanced I kappa B degradation. FADD(-/-) MEFs were also resistant to NF-kappa B activation induced by IL-1 beta. Finally, reconstitution of full-length FADD in the FADD(-/-) MEFs completely reversed the enhanced activation of NF-kappa B elicited by either LPS or IL-1 beta. Together, these data indicate that FADD negatively regulates LPS- and IL-1 beta-induced NF-kappa B activation and that this regulation occurs upstream of I kappa B degradation. [PUBMED: 11828002] Copyright © 2009, Tyers Lab, The Samuel Lunenfeld Research Institute, Mount Sinai Hospital, All Rights Reserved. terms and conditions - privacy policy - Osprey Network Visualization System BioGRID: A General Repository for Interaction Datasets. Chris Stark, Bobby-Joe Breitkreutz, Teresa Reguly, Lorrie Boucher, Ashton Breitkreutz, Mike Tyers. Nucleic Acids Res. Jan 1;34:D535-9.