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Article Dans Une Revue Journal of Immunology Année : 2012

Negative Regulation of NKG2D Expression by IL-4 in Memory CD8 T Cells

Résumé

IL-4 is one of the main cytokines produced during Th2-inducing pathologies. This cytokine has been shown to affect a number of immune processes such as Th differentiation and innate immune responses. However, the impact of IL-4 on CD8 T cell responses remains unclear. In this study, we analyzed the effects of IL-4 on global gene expression profiles of Ag-induced memory CD8 T cells in the mouse. Gene ontology analysis of this signature revealed that IL-4 regulated most importantly genes associated with immune responses. Moreover, this IL-4 signature overlapped with the set of genes preferentially expressed by memory CD8 T cells over naive CD8 T cells. In particular, IL-4 downregulated in vitro and in vivo in a STAT6-dependent manner the memory-specific expression of NKG2D, thereby increasing the activation threshold of memory CD8 T cells. Furthermore, IL-4 impaired activation of memory cells as well as their differentiation into effector cells. This phenomenon could have an important clinical relevance as patients affected by Th2 pathologies such as parasitic infections or atopic dermatitis often suffer from viral-induced complications possibly linked to inefficient CD8 T cell responses.
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Dates et versions

hal-02178329 , version 1 (09-07-2019)

Identifiants

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Erwan Ventre, Lilia Brinza, Stéphane Schicklin, Julien Mafille, Charles-Antoine Coupet, et al.. Negative Regulation of NKG2D Expression by IL-4 in Memory CD8 T Cells. Journal of Immunology, 2012, 189 (7), pp.3480-3489. ⟨10.4049/jimmunol.1102954⟩. ⟨hal-02178329⟩
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