Abstract

Stimulus-specific Induction of a Novel Nuclear Factor-κB Regulator, IκB-ζ, via Toll/Interleukin-1 Receptor Is Mediated by mRNA Stabilization

Highlights

  • Cells reprogram gene expression upon environmental changes to maintain homeostasis

  • We have recently identified an inducible nuclear factor-␬B (NF-␬B) regulator, I␬B-␨, which is induced by microbial ligands for Toll-like receptors such as lipopolysaccharide and the proinflammatory cytokine interleukin (IL)-1␤ but not by tumor necrosis factor (TNF)-␣

  • I␬B-␨ Is Induced by Stimulation of toll-like receptors (TLRs)/IL-1 receptor (IL-1R)— Our previous studies have demonstrated the essential requirement of an unidentified signal(s) for I␬B-␨ induction that comes from the TIR domain, in addition to Nuclear factor-␬B (NF-␬B) activation [18]

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Summary

Introduction

Cells reprogram gene expression upon environmental changes to maintain homeostasis. For multicellular organisms, serious environmental changes include microbial infection, and a major rearrangement of gene expression occurs during inflammatory responses against infection. We found that stability of I␬B-␨ mRNA was up-regulated by stimulation with LPS or IL-1␤ but not with TNF-␣. This finding indicates that in addition to NF-␬B activation, the other signal required for I␬B-␨ induction, which comes from the TIR domain but not from the TNF-␣ receptor, leads to mRNA stabilization.

Results
Conclusion

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