PMID- 9548510 OWN - NLM STAT- MEDLINE DCOM- 19980420 LR - 20171116 IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 159 IP - 11 DP - 1997 Dec 1 TI - IL-11 regulates macrophage effector function through the inhibition of nuclear factor-kappaB. PG - 5661-70 AB - Recombinant human IL-11 (rhIL-11) is an anti-inflammatory cytokine that can reduce the production of inflammatory mediators such as TNF-alpha, IL-1beta, IL-12, IL-6, and nitric oxide. Inhibition of proinflammatory cytokine production from activated macrophages was associated with a reduction in the levels of LPS-induced TNF-alpha, IL-1beta, IL-6, and IL-12 p40 mRNA. Analysis of rhIL-11 effects on transcription factors that activate proinflammatory cytokines demonstrated that the level of LPS-induced NF-kappaB binding activity in the nucleus of rhIL-11-treated peritoneal macrophages was significantly reduced. The block to NF-kappaB nuclear translocation correlated with the ability of rhIL-11 to maintain or increase protein levels of the inhibitors of NF-kappaB, IkappaB-alpha, and IkappaB-beta following LPS treatment. Furthermore, rhIL-11-treatment of LPS macrophages resulted in significant elevation of IkappaB-alpha and IkappaB-beta mRNA levels. These results suggest that the anti-inflammatory activity of rhIL-11 is mediated in part by inhibition of NF-kappaB-dependent transcriptional activation. Furthermore, these studies demonstrate for the first time the regulation of IkappaB-beta by an anti-inflammatory cytokine. Given the finding that inappropriate activation of NF-kappaB contributes to multiple inflammatory conditions, the ability of rhIL-11 to inhibit the binding activity of this pleiotropic transcription factor indicates that rhIL-11 has therapeutic potential in a wide range of diseases. FAU - Trepicchio, W L AU - Trepicchio WL AD - Preclinical Molecular and Cellular Biology, Genetics Institute, Andover, MA 01810, USA. wtrepicchio@genetics.com FAU - Wang, L AU - Wang L FAU - Bozza, M AU - Bozza M FAU - Dorner, A J AU - Dorner AJ LA - eng PT - Journal Article PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Cytokines) RN - 0 (DNA-Binding Proteins) RN - 0 (I kappa B beta protein) RN - 0 (I-kappa B Proteins) RN - 0 (Interleukin-11) RN - 0 (NF-kappa B) RN - 0 (RNA, Messenger) RN - 0 (Recombinant Proteins) RN - HM5641GA6F (oprelvekin) SB - IM MH - Animals MH - Cytokines/genetics/*metabolism MH - DNA-Binding Proteins/metabolism MH - Gene Expression MH - Humans MH - *I-kappa B Proteins MH - Inflammation/immunology MH - Interleukin-11/*pharmacology MH - Macrophage Activation MH - Macrophages, Peritoneal/*immunology MH - Mice MH - Mice, Inbred C57BL MH - NF-kappa B/*physiology MH - RNA, Messenger/metabolism MH - Recombinant Proteins/pharmacology EDAT- 1998/04/21 00:00 MHDA- 1998/04/21 00:01 CRDT- 1998/04/21 00:00 PHST- 1998/04/21 00:00 [pubmed] PHST- 1998/04/21 00:01 [medline] PHST- 1998/04/21 00:00 [entrez] PST - ppublish SO - J Immunol. 1997 Dec 1;159(11):5661-70.