Abstract
A high-fat diet (HFD) induces metabolic disease and low-grade metabolic inflammation in response to changes in the intestinal microbiota through as-yet-unknown mechanisms. Here, we show that a HFD-derived ileum microbiota is responsible for a decrease in Th17 cells of the lamina propria in axenic colonized mice. The HFD also changed the expression profiles of intestinal antigen-presenting cells and their ability to generate Th17 cells in vitro. Consistent with these data, the metabolic phenotype was mimicked in RORγt-deficient mice, which lack IL17 and IL22 function, and in the adoptive transfer experiment of T cells from RORγt-deficient mice into Rag1-deficient mice. We conclude that the microbiota of the ileum regulates Th17 cell homeostasis in the small intestine and determines the outcome of metabolic disease.
Copyright © 2015 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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CD4 Antigens / immunology*
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CD4-Positive T-Lymphocytes / immunology
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CD4-Positive T-Lymphocytes / metabolism
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CD4-Positive T-Lymphocytes / microbiology*
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Cells, Cultured
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Diabetes Mellitus, Type 2 / etiology
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Diabetes Mellitus, Type 2 / genetics
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Diabetes Mellitus, Type 2 / immunology
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Diabetes Mellitus, Type 2 / microbiology*
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Diet, High-Fat / adverse effects*
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Gastrointestinal Microbiome*
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Gene Deletion
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Gene Expression Regulation
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Ileum / immunology
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Ileum / metabolism
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Ileum / microbiology
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Immunity
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Interleukin-17 / genetics
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Interleukin-17 / immunology
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Male
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Mice
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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 / immunology*
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Obesity / etiology
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Obesity / genetics
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Obesity / immunology
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Obesity / microbiology*
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Th17 Cells / immunology
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Th17 Cells / metabolism
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Th17 Cells / microbiology
Substances
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CD4 Antigens
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Interleukin-17
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Nuclear Receptor Subfamily 1, Group F, Member 3
Associated data
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GEO/GSE52557
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GEO/GSE52558
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GEO/GSE52559