Author
Listed:
- Milena J. Tosiek
(Unité de Biologie des Populations Lymphocytaires, Institut Pasteur
CNRS, URA1961)
- Laurence Fiette
(Unité d’Histopathologie Humaine et Modèles Animaux, Institut Pasteur
Université Paris-Descartes, Hôpital Ste Anne)
- Sary El Daker
(Unité de Biologie des Populations Lymphocytaires, Institut Pasteur
CNRS, URA1961)
- Gérard Eberl
(CNRS, URA1961
Unité de Développement des Tissus Lymphoïdes, Institut Pasteur)
- Antonio A. Freitas
(Unité de Biologie des Populations Lymphocytaires, Institut Pasteur
CNRS, URA1961)
Abstract
The ability of CD4+ T cells to change their phenotype and to specialize into different functional subsets may enhance the risk of autoimmune diseases. Here we investigate how a pleiotropic cytokine interleukin (IL)-15 may modify the functional commitment of CD4+ T cells expressing the lineage-associated transcription factors: forkhead box P3 (Foxp3; Treg) and RORγt (Th17) in the context of inflammatory bowel disease (IBD). We demonstrate in mice that impaired delivery of IL-15 to CD4+ T cells in the colon downmodulates Foxp3 expression (diminishing STAT5 phosphorylation) and enhances RORγt expression (by upregulating the expression of Runx1). In consequence, CD4+ T cells deprived of IL-15 rapidly trigger IBD characterized by enhanced production of pro-inflammatory cytokines (interferon-γ, IL-6) and accumulation of Th1/Th17 cells. Overall, our findings indicate a potentially beneficial role of IL-15 in IBD by fine-tuning the balance between Treg and Th17 cells and controlling intestinal inflammation.
Suggested Citation
Milena J. Tosiek & Laurence Fiette & Sary El Daker & Gérard Eberl & Antonio A. Freitas, 2016.
"IL-15-dependent balance between Foxp3 and RORγt expression impacts inflammatory bowel disease,"
Nature Communications, Nature, vol. 7(1), pages 1-11, April.
Handle:
RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10888
DOI: 10.1038/ncomms10888
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