Abstract
Greater understanding of the complex host responses induced by type 1 interferon (IFN) cytokines could allow new therapeutic approaches for diseases in which these cytokines are implicated. We found that in response to the Toll-like receptor-9 agonist CpGA, plasmacytoid dendritic cells (pDC) produced type 1 IFNs, which, through an autocrine type 1 IFN receptor-dependent pathway, induced changes in cellular metabolism characterized by increased fatty acid oxidation (FAO) and oxidative phosphorylation (OXPHOS). Direct inhibition of FAO and of pathways that support this process, such as fatty acid synthesis, prevented full pDC activation. Type 1 IFNs also induced increased FAO and OXPHOS in non-hematopoietic cells and were found to be responsible for increased FAO and OXPHOS in virus-infected cells. Increased FAO and OXPHOS in response to type 1 IFNs was regulated by PPARα. Our findings reveal FAO, OXPHOS and PPARα as potential targets to therapeutically modulate downstream effects of type 1 IFNs.
Copyright © 2016 Elsevier Inc. All rights reserved.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, Non-P.H.S.
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Research Support, N.I.H., Extramural
MeSH terms
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3-Hydroxyacyl CoA Dehydrogenases / metabolism
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Acetyl-CoA C-Acyltransferase / metabolism
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Animals
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Carbon-Carbon Double Bond Isomerases / metabolism
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Cell Differentiation
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Cells, Cultured
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CpG Islands / immunology
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Dendritic Cells / immunology*
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Enoyl-CoA Hydratase / metabolism
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Gene Expression Regulation
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Immunity
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Interferon Type I / metabolism*
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Lipid Metabolism
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Lymphocytic Choriomeningitis / immunology*
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Lymphocytic choriomeningitis virus / immunology*
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Mice
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Mice, Inbred C57BL
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Oligodeoxyribonucleotides / immunology
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Oxidative Phosphorylation
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PPAR alpha / metabolism*
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Racemases and Epimerases / metabolism
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Receptors, Interferon / metabolism
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Signal Transduction
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Toll-Like Receptor 9 / metabolism
Substances
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Interferon Type I
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Oligodeoxyribonucleotides
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PPAR alpha
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Receptors, Interferon
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Toll-Like Receptor 9
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fatty acid oxidation complex
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3-Hydroxyacyl CoA Dehydrogenases
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Acetyl-CoA C-Acyltransferase
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Enoyl-CoA Hydratase
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Racemases and Epimerases
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Carbon-Carbon Double Bond Isomerases