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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Cell+Biol
2017 ; 216
(3
): 779-792
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Transcriptional determinants of tolerogenic and immunogenic states during
dendritic cell maturation
#MMPMID28130292
Vander Lugt B
; Riddell J
; Khan AA
; Hackney JA
; Lesch J
; DeVoss J
; Weirauch MT
; Singh H
; Mellman I
J Cell Biol
2017[Mar]; 216
(3
): 779-792
PMID28130292
show ga
Dendritic cells (DCs) promote either tolerogenic or immunogenic T cell responses,
the latter upon sensing microbes. Using an in vitro system, we analyzed
transcriptional determinants that enable mature DCs to direct these opposing T
cell outcomes. In the absence of microbial products, the transcription factor
interferon regulatory factor 4 (IRF4) promotes regulatory T cell (T(reg))
generation by enhancing expression of genes required for antigen presentation
along with those for T cell tolerance. IRF4-deficient DCs were impaired for
T(reg) generation in vivo. When exposed to microbial stimuli, DCs activated
nuclear factor (NF)-?B, which induced expression of a proinflammatory cytokine
module that, along with the antigen presentation module, promoted the generation
of effector T cells. NF-?B was, however, dispensable for T(reg) development.
Chromatin profiling revealed transcriptional motifs associated with the divergent
DC programs. Thus, DCs modulate their ability to prime tolerogenic or immunogenic
T cells by expressing a core antigen presentation module that is overlaid by
distinctive regulatory modules to promote either tolerance or immunity.