PMID- 20534530 OWN - NLM STAT- MEDLINE DCOM- 20100722 LR - 20211020 IS - 1091-6490 (Electronic) IS - 0027-8424 (Print) IS - 0027-8424 (Linking) VI - 107 IP - 25 DP - 2010 Jun 22 TI - Identification of an IL-27/osteopontin axis in dendritic cells and its modulation by IFN-gamma limits IL-17-mediated autoimmune inflammation. PG - 11495-500 LID - 10.1073/pnas.1002099107 [doi] AB - Dendritic cells (DCs) play a central role in determining the induction of T cell responses. IL-27 production by DCs favors induction of IL-10-producing regulatory T cells, whereas osteopontin (OPN) promotes pathogenic IL-17 T cell responses. The regulatory mechanisms in DCs that control these two cells types are not understood well. Here, we show that IFN-gamma induces IL-27 while inhibiting OPN expression in DCs both in vitro and in vivo and that engagement of IFN-gammaR expressed by DCs leads to suppression of IL-17 production while inducing IL-10 from T cells. DCs modified by IFN-gamma acquire IL-27-dependent regulatory function, promote IL-10-mediated T cell tolerance, and suppress autoimmune inflammation. Thus, our results identify a previously unknown pathway by which IFN-gamma limits IL-17-mediated autoimmune inflammation through differential regulation of OPN and IL-27 expression in DCs. FAU - Murugaiyan, Gopal AU - Murugaiyan G AD - Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. FAU - Mittal, Akanksha AU - Mittal A FAU - Weiner, Howard L AU - Weiner HL LA - eng GR - R01 AI043458/AI/NIAID NIH HHS/United States GR - NS23132/NS/NINDS NIH HHS/United States GR - NS038037/NS/NINDS NIH HHS/United States GR - F32AI075761/AI/NIAID NIH HHS/United States GR - F32 AI075761/AI/NIAID NIH HHS/United States GR - AI043458/AI/NIAID NIH HHS/United States GR - R01 NS023132/NS/NINDS NIH HHS/United States GR - P01 NS038037-10/NS/NINDS NIH HHS/United States GR - P01 NS038037/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20100607 PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (Interleukin-17) RN - 0 (Peptides) RN - 106441-73-0 (Osteopontin) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Animals MH - *Autoimmunity MH - CD4-Positive T-Lymphocytes/cytology MH - Coculture Techniques MH - Encephalomyelitis, Autoimmune, Experimental/*metabolism MH - Interferon-gamma/*metabolism MH - Interleukin-17/*metabolism MH - Mice MH - Models, Biological MH - Osteopontin/*metabolism MH - Peptides/chemistry MH - Phenotype MH - Spleen/cytology MH - Time Factors PMC - PMC2895126 COIS- The authors declare no conflict of interest. EDAT- 2010/06/11 06:00 MHDA- 2010/07/23 06:00 PMCR- 2010/12/22 CRDT- 2010/06/11 06:00 PHST- 2010/06/11 06:00 [entrez] PHST- 2010/06/11 06:00 [pubmed] PHST- 2010/07/23 06:00 [medline] PHST- 2010/12/22 00:00 [pmc-release] AID - 1002099107 [pii] AID - 201002099 [pii] AID - 10.1073/pnas.1002099107 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 2010 Jun 22;107(25):11495-500. doi: 10.1073/pnas.1002099107. Epub 2010 Jun 7.