Dendritic cells ameliorate autoimmunity in the CNS by controlling the homeostasis of PD-1 receptor(+) regulatory T cells.
Immunity
; 37(2): 264-75, 2012 Aug 24.
Article
em En
| MEDLINE
| ID: mdl-22902234
ABSTRACT
Mature dendritic cells (DCs) are established as unrivaled antigen-presenting cells (APCs) in the initiation of immune responses, whereas steady-state DCs induce peripheral T cell tolerance. Using various genetic approaches, we depleted CD11c(+) DCs in mice and induced autoimmune CNS inflammation. Unexpectedly, mice lacking DCs developed aggravated disease compared to control mice. Furthermore, when we engineered DCs to present a CNS-associated autoantigen in an induced manner, we found robust tolerance that prevented disease, which coincided with an upregulation of the PD-1 receptor on antigen-specific T cells. Additionally, we showed that PD-1 was necessary for DC-mediated induction of regulatory T cells. Our results show that a reduction of DCs interferes with tolerance, resulting in a stronger inflammatory response, and that other APC populations could compensate for the loss of immunogenic APC function in DC-depleted mice.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Células Dendríticas
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Linfócitos T Reguladores
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Encefalomielite Autoimune Experimental
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Receptor de Morte Celular Programada 1
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Tolerância Imunológica
Limite:
Animals
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article