Abstract
T helper 17 (Th17) cells can give rise to interleukin-17A (IL-17A)- and interferon (IFN)-γ-double-producing cells that are implicated in development of autoimmune diseases. However, the molecular mechanisms that govern generation of IFN-γ-producing Th17 cells are unclear. We found that coexpression of the Th1 and Th17 cell master transcription factors, T-bet and retinoid-related orphan receptor gamma-t (RORγt), respectively, did not generate Th cells with robust IL-17 and IFN-γ expression. Instead, development of IFN-γ-producing Th17 cells required T-bet and Runx1 or Runx3. IL-12-stimulated Th17 cells upregulated Runx1, which bound to the Ifng locus in a T-bet-dependent manner. Reciprocally, T-bet or Runx1 deficiency or inhibition of Runx transcriptional activity impaired the development of IFN-γ-producing Th17 cells during experimental autoimmune encephalomyelitis, which correlated with substantially ameliorated disease course. Thus, our studies identify a critical role for T-bet and Runx transcription factors in the generation of pathogenic IFN-γ-producing Th17 cells.
Copyright © 2014 Elsevier Inc. All rights reserved.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Cell Differentiation
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Core Binding Factor Alpha 2 Subunit / genetics
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Core Binding Factor Alpha 2 Subunit / metabolism
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Core Binding Factor Alpha 3 Subunit / genetics
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Core Binding Factor Alpha 3 Subunit / metabolism
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Core Binding Factor alpha Subunits / genetics
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Core Binding Factor alpha Subunits / metabolism*
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Disease Models, Animal
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Encephalomyelitis, Autoimmune, Experimental / immunology
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Encephalomyelitis, Autoimmune, Experimental / metabolism
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Gene Expression
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Genetic Loci
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Interferon-gamma / biosynthesis*
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Interferon-gamma / genetics
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Mice
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Mice, Knockout
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Nuclear Receptor Subfamily 1, Group F, Member 3 / genetics
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Nuclear Receptor Subfamily 1, Group F, Member 3 / metabolism
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Protein Binding
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T-Box Domain Proteins / genetics
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T-Box Domain Proteins / metabolism*
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Th1 Cells / cytology
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Th1 Cells / immunology
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Th1 Cells / metabolism
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Th17 Cells / cytology
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Th17 Cells / immunology*
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Th17 Cells / metabolism*
Substances
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Core Binding Factor Alpha 2 Subunit
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Core Binding Factor Alpha 3 Subunit
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Core Binding Factor alpha Subunits
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Nuclear Receptor Subfamily 1, Group F, Member 3
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T-Box Domain Proteins
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T-box transcription factor TBX21
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Interferon-gamma