title: The primary mechanism of the IL-10-regulated antiinflammatory response is to selectively inhibit transcription.
abstract: The antiinflammatory cytokine IL-10 inhibits the production of multiple, diverse inflammatory mediators from activated macrophages and dendritic cells, a process requiring STAT3 activation. However, the mechanisms involved in the broad inhibitory effects of IL-10 are controversial. I eliminated the contribution of the major confounding variable to understanding the antiinflammatory response, the 3' UTR region of inflammatory mediator genes, through knock-in mutation and analysis of the effects of IL-10 on transcription rate of inflammatory genes. IL-10 activates STAT3 to act indirectly by selectively inhibiting gene transcription independent of general effects on NF-kappaB or posttranscriptional mRNA processing through a process that reduces the overall transcriptional rate of specific genes.
authors.affiliation: Department of Infectious Diseases, St. Jude Children's Research Hospital, 332 North Lauderdale, Memphis, TN 38105, USA. peter.murray@stjude.org
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Murray
mesh_terms: D000818:Animals; D015152:Blotting, Northern; D004268:DNA-Binding Proteins / Q000378:metabolism*; D005786:Gene Expression Regulation; D020672:I-kappa B Proteins; D015151:Immunoblotting; D018836:Inflammation Mediators / Q000378:metabolism*; D016753:Interleukin-10 / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D008822:Mice, Transgenic; D009154:Mutation / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D050796:STAT3 Transcription Factor; D015398:Signal Transduction / Q000502:physiology*; D015534:Trans-Activators / Q000378:metabolism*
chemical_list: D004268:DNA-Binding Proteins; D020672:I-kappa B Proteins; D018836:Inflammation Mediators; D050796:STAT3 Transcription Factor; C494087:Stat3 protein, mouse; D015534:Trans-Activators; D016753:Interleukin-10