The negative control of activated macrophages is an important mechanism to avoid immune pathology. A central regulator is the cytokine IL-10, which inhibits the production of numerous cytokines and chemokines. In this study, the phosphatase DUSP1 was identified as a key mediator of the inhibitory IL-10 effect. The DUSP1-dependent deactivation of the MAPK p38 correlated with the inhibition of pro-inflammatory cytokines in macrophages. Upon LPS challenge or the induction of polymicrobial peritonitis, DUSP1-deficient mice produced elevated levels of various cytokines and developed a lethal shock syndrome. Taken together, these data reveal a non-redundant role for DUSP1 in the regulation of innate immune responses.
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The negative control of activated macrophages is an important mechanism to avoid immune pathology. A central regulator is the cytokine IL-10, which inhibits the production of numerous cytokines and chemokines. In this study, the phosphatase DUSP1 was identified as a key mediator of the inhibitory IL-10 effect. The DUSP1-dependent deactivation of the MAPK p38 correlated with the inhibition of pro-inflammatory cytokines in macrophages. Upon LPS challenge or the induction of polymicrobial peritonit...
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