Human dendritic cells sequentially matured with CD4+ T cells as a secondary signal favor CTL and long-term T memory cell responses
Biol. Res
;
45(1): 33-43, 2012. ilus
Artículo
en Inglés
| LILACS
| ID: lil-626745
ABSTRACT
Dendritic cells (DCs) are professional antigen-presenting cells involved in the control and initiation of immune responses. In vivo, DCs exposed at the periphery to maturation stimuli migrate to lymph nodes, where they receive secondary signals from CD4+ T helper cells. These DCs become able to initiate CD8+ cytotoxic T lymphocyte (CTL) responses. However, in vitro investigations concerning human monocyte-derived DCs have never focused on their functional properties after such sequential maturation. Here, we studied human DC phenotypes and functions according to this sequential exposure to maturation stimuli. As first signals, we used TNF-α/polyIC mimicking inflammatory and pathogen stimuli and, as second signals, we compared activated CD4+ T helper cells to a combination of CD40-L/ IFN-γ. Our results show that a sequential activation with activated CD4+ T cells dramatically increased the maturation of DCs in terms of their phenotype and cytokine secretion compared to DCs activated with maturation stimuli delivered simultaneously. Furthermore, this sequential maturation led to the induction of CTL with a long-term effector and central memory phenotypes. Thus, sequential delivery of maturation stimuli, which includes CD4+ T cells, should be considered in the future to improve the induction of long-term CTL memory in DC-based immunotherapy.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Células Dendríticas
/
Linfocitos T Citotóxicos
/
Linfocitos T Colaboradores-Inductores
/
Memoria Inmunológica
Límite:
Humanos
Idioma:
Inglés
Revista:
Biol. Res
Asunto de la revista:
Biologia
Año:
2012
Tipo del documento:
Artículo
País de afiliación:
Francia
Institución/País de afiliación:
Université de Nantes/FR
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