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IL-37 is a fundamental inhibitor of innate immunity.


ABSTRACT: The function of interleukin 37 (IL-37; formerly IL-1 family member 7) has remained elusive. Expression of IL-37 in macrophages or epithelial cells almost completely suppressed production of pro-inflammatory cytokines, whereas the abundance of these cytokines increased with silencing of endogenous IL-37 in human blood cells. Anti-inflammatory cytokines were unaffected. Mice with transgenic expression of IL-37 were protected from lipopolysaccharide-induced shock, and showed markedly improved lung and kidney function and reduced liver damage after treatment with lipopolysaccharide. Transgenic mice had lower concentrations of circulating and tissue cytokines (72-95% less) than wild-type mice and showed less dendritic cell activation. IL-37 interacted intracellularly with Smad3 and IL-37-expressing cells and transgenic mice showed less cytokine suppression when endogenous Smad3 was depleted. IL-37 thus emerges as a natural suppressor of innate inflammatory and immune responses.

SUBMITTER: Nold MF 

PROVIDER: S-EPMC3537119 | biostudies-literature | 2010 Nov

REPOSITORIES: biostudies-literature

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IL-37 is a fundamental inhibitor of innate immunity.

Nold Marcel F MF   Nold Marcel F MF   Nold-Petry Claudia A CA   Zepp Jarod A JA   Palmer Brent E BE   Bufler Philip P   Dinarello Charles A CA  

Nature immunology 20101010 11


The function of interleukin 37 (IL-37; formerly IL-1 family member 7) has remained elusive. Expression of IL-37 in macrophages or epithelial cells almost completely suppressed production of pro-inflammatory cytokines, whereas the abundance of these cytokines increased with silencing of endogenous IL-37 in human blood cells. Anti-inflammatory cytokines were unaffected. Mice with transgenic expression of IL-37 were protected from lipopolysaccharide-induced shock, and showed markedly improved lung  ...[more]

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