PMID- 26692173 OWN - NLM STAT- MEDLINE DCOM- 20160606 LR - 20220330 IS - 1529-2916 (Electronic) IS - 1529-2908 (Print) IS - 1529-2908 (Linking) VI - 17 IP - 2 DP - 2016 Feb TI - Self-reactive IgE exacerbates interferon responses associated with autoimmunity. PG - 196-203 LID - 10.1038/ni.3326 [doi] AB - Canonically, immunoglobulin E (IgE) mediates allergic immune responses by triggering mast cells and basophils to release histamine and type 2 helper cytokines. Here we found that in human systemic lupus erythematosus (SLE), IgE antibodies specific for double-stranded DNA (dsDNA) activated plasmacytoid dendritic cells (pDCs), a type of cell of the immune system linked to viral defense, which led to the secretion of substantial amounts of interferon-alpha (IFN-alpha). The concentration of dsDNA-specific IgE found in patient serum correlated with disease severity and greatly potentiated pDC function by triggering phagocytosis via the high-affinity FcvarepsilonRI receptor for IgE, followed by Toll-like receptor 9 (TLR9)-mediated sensing of DNA in phagosomes. Our findings expand the known pathogenic mechanisms of IgE-mediated inflammation beyond those found in allergy and demonstrate that IgE can trigger interferon responses capable of exacerbating self-destructive autoimmune responses. FAU - Henault, Jill AU - Henault J AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Riggs, Jeffrey M AU - Riggs JM AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Karnell, Jodi L AU - Karnell JL AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Liarski, Vladimir M AU - Liarski VM AD - Section of Rheumatology and Gwen Knapp Center for Lupus and Immunology Research, University of Chicago, Chicago, Illinois, USA. FAU - Li, Jianqing AU - Li J AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Shirinian, Lena AU - Shirinian L AD - Antibody Discovery and Protein Engineering Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Xu, Linda AU - Xu L AD - Antibody Discovery and Protein Engineering Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Casey, Kerry A AU - Casey KA AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Smith, Michael A AU - Smith MA AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Khatry, Deepak B AU - Khatry DB AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Izhak, Liat AU - Izhak L AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Clarke, Lorraine AU - Clarke L AD - Antibody Discovery and Protein Engineering Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Herbst, Ronald AU - Herbst R AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Ettinger, Rachel AU - Ettinger R AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Petri, Michelle AU - Petri M AD - Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. FAU - Clark, Marcus R AU - Clark MR AD - Section of Rheumatology and Gwen Knapp Center for Lupus and Immunology Research, University of Chicago, Chicago, Illinois, USA. FAU - Mustelin, Tomas AU - Mustelin T AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Kolbeck, Roland AU - Kolbeck R AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. FAU - Sanjuan, Miguel A AU - Sanjuan MA AD - Research Department, MedImmune, Gaithersburg, Maryland, USA. LA - eng GR - R01 AR043727/AR/NIAMS NIH HHS/United States GR - R01 AR055646/AR/NIAMS NIH HHS/United States GR - U19 AI082724/AI/NIAID NIH HHS/United States GR - AR-43727/AR/NIAMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20151221 PL - United States TA - Nat Immunol JT - Nature immunology JID - 100941354 RN - 0 (Antibodies, Antinuclear) RN - 0 (Antigen-Antibody Complex) RN - 0 (Autoantibodies) RN - 0 (Cytokines) RN - 0 (Immunoglobulin G) RN - 0 (Toll-Like Receptor 9) RN - 37341-29-0 (Immunoglobulin E) RN - 9008-11-1 (Interferons) SB - IM CIN - Cell Res. 2016 Mar;26(3):271-2. PMID: 26794873 MH - Antibodies, Antinuclear/immunology MH - Antigen-Antibody Complex/immunology/metabolism MH - Autoantibodies/*immunology MH - *Autoimmunity MH - B-Lymphocytes/immunology/metabolism MH - Cytokines/blood/metabolism MH - Dendritic Cells/immunology/metabolism MH - Female MH - Humans MH - Immunoglobulin E/blood/*immunology MH - Immunoglobulin G/blood/immunology MH - Interferons/*metabolism MH - Leukocytes, Mononuclear/immunology/metabolism MH - Lupus Erythematosus, Systemic/blood/immunology/metabolism MH - Lupus Nephritis/immunology/pathology MH - Male MH - Phagocytosis/immunology MH - Phagosomes/metabolism MH - Plasma Cells/immunology/metabolism MH - Toll-Like Receptor 9/metabolism PMC - PMC4718782 MID - NIHMS731890 EDAT- 2015/12/23 06:00 MHDA- 2016/06/09 06:00 PMCR- 2016/06/21 CRDT- 2015/12/23 06:00 PHST- 2015/08/25 00:00 [received] PHST- 2015/10/19 00:00 [accepted] PHST- 2015/12/23 06:00 [entrez] PHST- 2015/12/23 06:00 [pubmed] PHST- 2016/06/09 06:00 [medline] PHST- 2016/06/21 00:00 [pmc-release] AID - ni.3326 [pii] AID - 10.1038/ni.3326 [doi] PST - ppublish SO - Nat Immunol. 2016 Feb;17(2):196-203. doi: 10.1038/ni.3326. Epub 2015 Dec 21.