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Type I IFN signaling facilitates the development of IL-10-producing effector CD8+ T cells during murine influenza virus infection.


ABSTRACT: Recent evidence has suggested that IL-10-producing effector CD8+ T cells play an important role in regulating excessive inflammation during acute viral infections. However, the cellular and molecular cues regulating the development of IL-10-producing effector CD8+ T cells are not completely defined. Here, we show that type I interferons (IFNs) are required for the development of IL-10-producing effector CD8+ T cells during influenza virus infection in mice. We find that type I IFNs can enhance IL-27 production by lung APCs, thereby facilitating IL-10-producing CD8+ T-cell development through a CD8+ T-cell-nonautonomous way. Surprisingly, we also demonstrate that direct type I IFN signaling in CD8+ T cells is required for the maximal generation of IL-10-producing CD8+ T cells. Type I IFN signaling in CD8+ T cells, in cooperation with IL-27 and IL-2 signaling, promotes and sustains the expression of IFN regulatory factor 4 (IRF4) and B-lymphocyte-induced maturation protein-1 (Blimp-1), two transcription factors required for the production of IL-10 by effector CD8+ T cells. Our data reveal a critical role of the innate antiviral effector cytokines in regulating the production of a regulatory cytokine by effector CD8+ T cells during respiratory virus infection.

SUBMITTER: Jiang L 

PROVIDER: S-EPMC5184847 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature

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Type I IFN signaling facilitates the development of IL-10-producing effector CD8<sup>+</sup> T cells during murine influenza virus infection.

Jiang Li L   Yao Shuyu S   Huang Su S   Wright Jeffrey J   Braciale Thomas J TJ   Sun Jie J  

European journal of immunology 20161109 12


Recent evidence has suggested that IL-10-producing effector CD8<sup>+</sup> T cells play an important role in regulating excessive inflammation during acute viral infections. However, the cellular and molecular cues regulating the development of IL-10-producing effector CD8<sup>+</sup> T cells are not completely defined. Here, we show that type I interferons (IFNs) are required for the development of IL-10-producing effector CD8<sup>+</sup> T cells during influenza virus infection in mice. We fi  ...[more]

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