Abstract
The epithelium is the main entry point for many viruses, but the processes that protect barrier surfaces against viral infections are incompletely understood. Here we identified interleukin 22 (IL-22) produced by innate lymphoid cell group 3 (ILC3) as an amplifier of signaling via interferon-λ (IFN-λ), a synergism needed to curtail the replication of rotavirus, the leading cause of childhood gastroenteritis. Cooperation between the receptor for IL-22 and the receptor for IFN-λ, both of which were 'preferentially' expressed by intestinal epithelial cells (IECs), was required for optimal activation of the transcription factor STAT1 and expression of interferon-stimulated genes (ISGs). These data suggested that epithelial cells are protected against viral replication by co-option of two evolutionarily related cytokine networks. These data may inform the design of novel immunotherapy for viral infections that are sensitive to interferons.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Caco-2 Cells
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Cell Line
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Chlorocebus aethiops
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Cytokines / genetics
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Cytokines / immunology*
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Cytokines / pharmacology
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Dogs
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Drug Synergism
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Epithelial Cells / immunology
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Epithelial Cells / metabolism
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Epithelial Cells / virology
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Gene Expression / drug effects
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Gene Expression / immunology*
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HT29 Cells
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Humans
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Immunoblotting
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Interleukin-22
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Interleukins / genetics
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Interleukins / immunology*
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Interleukins / pharmacology
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Intestinal Mucosa / metabolism
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Intestines / immunology
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Intestines / virology
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Madin Darby Canine Kidney Cells
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Mice, Inbred C57BL
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Mice, Knockout
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Mice, Transgenic
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Molecular Sequence Data
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Receptors, Cytokine / genetics
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Receptors, Cytokine / immunology
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Reverse Transcriptase Polymerase Chain Reaction
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Rotavirus Infections / genetics
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Rotavirus Infections / immunology*
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Rotavirus Infections / virology
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STAT1 Transcription Factor / genetics
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STAT1 Transcription Factor / immunology
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STAT1 Transcription Factor / metabolism
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Vero Cells
Substances
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Cytokines
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Interleukins
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Receptors, Cytokine
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STAT1 Transcription Factor
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interferon-lambda protein, mouse