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2016 ; 17
(5
): 545-55
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Classical dendritic cells are required for dietary antigen-mediated induction of
peripheral T(reg) cells and tolerance
#MMPMID27019226
Esterházy D
; Loschko J
; London M
; Jove V
; Oliveira TY
; Mucida D
Nat Immunol
2016[May]; 17
(5
): 545-55
PMID27019226
show ga
Oral tolerance prevents pathological inflammatory responses to innocuous foreign
antigens by peripheral regulatory T cells (pT(reg) cells). However, whether a
particular subset of antigen-presenting cells (APCs) is required during dietary
antigen exposure for the 'instruction' of naive CD4(+) T cells to differentiate
into pT(reg) cells has not been defined. Using myeloid lineage-specific APC
depletion in mice, we found that monocyte-derived APCs were dispensable, while
classical dendritic cells (cDCs) were critical, for pT(reg) cell induction and
oral tolerance. CD11b(-) cDCs from the gut-draining lymph nodes efficiently
induced pT(reg) cells and, conversely, loss of transcription factor
IRF8-dependent CD11b(-) cDCs impaired their polarization, although oral tolerance
remained intact. These data reveal the hierarchy of cDC subsets in the induction
of pT(reg) cells and their redundancy during the development of oral tolerance.