alexa Recombinant human IL-11 attenuates the inflammatory response through down-regulation of proinflammatory cytokine release and nitric oxide production.
Immunology

Immunology

Immunome Research

Author(s): Trepicchio WL, Bozza M, Pedneault G, Dorner AJ

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To elucidate the molecular mechanisms regulating the anti-inflammatory activities of recombinant human (rh)IL-11, the ability of rhIL-11 to reduce serum levels of inflammatory mediators such as TNF-alpha, IL-1beta, IL-12, and IFN-gamma in LPS-treated mice and to down-regulate macrophage function in culture was investigated. In a mouse model of endotoxemia, pretreatment with rhIL-11 blocked LPS-induced elevation of TNF-alpha, IL-1beta, and IFN-gamma serum levels, but had no effect on IL-12 p40, IL-6, or IL-10 serum levels. The effects of rhIL-11 on the production of inflammatory mediators in vivo may occur in part through direct interactions with macrophages. rhIL-11 pretreatment of thioglycollate-elicited peritoneal macrophages resulted in greater than 60% inhibition of LPS-induced production of TNF-alpha, IL-1beta, IL-12 p40, and nitric oxide. The activity of rhIL-11 was not mediated through induction of IL-10, IL-6, or TGF-beta1. These results indicate that the ability of rhIL-11 to modulate the inflammatory response is not dependent on known anti-inflammatory cytokines and substantiate a role for this cytokine in the attenuation of inflammatory conditions.

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This article was published in J Immunol. and referenced in Immunome Research

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