Abstract
The transcriptional regulator Rbpj is involved in T-helper (TH) subset polarization, but its function in Treg cells remains unclear. Here we show that Treg-specific Rbpj deletion leads to splenomegaly and lymphadenopathy despite increased numbers of Treg cells with a polyclonal TCR repertoire. A specific defect of Rbpj-deficient Treg cells in controlling TH2 polarization and B cell responses is observed, leading to the spontaneous formation of germinal centers and a TH2-associated immunoglobulin class switch. The observed phenotype is environment-dependent and can be induced by infection with parasitic nematodes. Rbpj-deficient Treg cells adopt open chromatin landscapes and gene expression profiles reminiscent of tissue-derived TH2-polarized Treg cells, with a prevailing signature of the transcription factor Gata-3. Taken together, our study suggests that Treg cells require Rbpj to specifically restrain TH2 responses, including their own excessive TH2-like differentiation potential.
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 / immunology
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Disease Models, Animal
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Female
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GATA3 Transcription Factor / metabolism
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Gene Expression Profiling
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Gene Expression Regulation / immunology
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Germinal Center / immunology
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Humans
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Immunity, Cellular*
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Immunoglobulin J Recombination Signal Sequence-Binding Protein / genetics
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Immunoglobulin J Recombination Signal Sequence-Binding Protein / immunology
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Immunoglobulin J Recombination Signal Sequence-Binding Protein / metabolism*
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Lymphocyte Activation
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Male
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Mice
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Mice, Inbred C57BL
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Mice, Transgenic
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Strongyloides ratti / immunology
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Strongyloides ratti / pathogenicity
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Strongyloidiasis / immunology*
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Strongyloidiasis / parasitology
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T-Lymphocytes, Regulatory / immunology*
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T-Lymphocytes, Regulatory / metabolism
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Th2 Cells / immunology*
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Transcriptome / immunology
Substances
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GATA3 Transcription Factor
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Gata3 protein, mouse
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Immunoglobulin J Recombination Signal Sequence-Binding Protein
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Rbpj protein, mouse