Continuous T cell receptor signals maintain a functional regulatory T cell pool.
Immunity
; 41(5): 722-36, 2014 Nov 20.
Article
em En
| MEDLINE
| ID: mdl-25464853
ABSTRACT
Regulatory T (Treg) cells maintain immune homeostasis and prevent inflammatory and autoimmune responses. During development, thymocytes bearing a moderately self-reactive T cell receptor (TCR) can be selected to become Treg cells. Several observations suggest that also in the periphery mature Treg cells continuously receive self-reactive TCR signals. However, the importance of this inherent autoreactivity for Treg cell biology remains poorly defined. To address this open question, we genetically ablated the TCR of mature Treg cells in vivo. These experiments revealed that TCR-induced Treg lineage-defining Foxp3 expression and gene hypomethylation were uncoupled from TCR input in mature Treg cells. However, Treg cell homeostasis, cell-type-specific gene expression and suppressive function critically depend on continuous triggering of their TCR.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Autoimunidade
/
Receptores de Antígenos de Linfócitos T alfa-beta
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Linfócitos T Reguladores
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Fatores de Transcrição Forkhead
Limite:
Animals
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article