Human CD4+/CD8α+ regulatory T cells induced by Faecalibacterium prausnitzii protect against intestinal inflammation - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue JCI Insight Année : 2022

Human CD4+/CD8α+ regulatory T cells induced by Faecalibacterium prausnitzii protect against intestinal inflammation

Résumé

Faecalibacterium prausnitzii (F. prausnitzii), a dominant bacterium of the human microbiota, is decreased in patients with inflammatory bowel diseases (IBD) and exhibits anti-inflammatory effects. In human, colonic lamina propria contains IL-10-secreting, Foxp3-negative regulatory T cells (Treg) characterized by a double expression of CD4 and CD8α (DP8α) and a specificity for F. prausnitzii. This Treg subset is decreased in IBD. The in vivo effect of DP8α cells has not been evaluated yet. Here, using a humanized model of NOD.Prkcscid IL2rγ-/- (NSG) immunodeficient mouse strain that expresses the human leucocyte antigen D-related allele HLA-DR*0401 but not murine class II (NSG-Ab° DR4) molecules, we demonstrated a protective effect of a HLA-DR*0401-restricted DP8α Treg clone combined with F. prausnitzii administration in a colitis model. In a cohort of patients with IBD, we showed an independent association between the frequency of circulating DP8α cells and disease activity. Finally, we pointed out a positive correlation between F. prausnitzii-specific DP8α Tregs and the amount of F. prausnitzii in fecal microbiota in healthy individuals and patients with ileal Crohn's disease.
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Dates et versions

hal-03664919 , version 1 (05-12-2023)

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Sothea Touch, Emmanuelle Godefroy, Nathalie Rolhion, Camille Danne, Cyriane Oeuvray, et al.. Human CD4+/CD8α+ regulatory T cells induced by Faecalibacterium prausnitzii protect against intestinal inflammation. JCI Insight, 2022, 7 (12), pp.e154722. ⟨10.1172/jci.insight.154722⟩. ⟨hal-03664919⟩
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