Neonatal colonisation expands a specific intestinal antigen-presenting cell subset prior to CD4 T-cell expansion, without altering T-cell repertoire.
PLoS One
; 7(3): e33707, 2012.
Article
en En
| MEDLINE
| ID: mdl-22442714
ABSTRACT
Interactions between the early-life colonising intestinal microbiota and the developing immune system are critical in determining the nature of immune responses in later life. Studies in neonatal animals in which this interaction can be examined are central to understanding the mechanisms by which the microbiota impacts on immune development and to developing therapies based on manipulation of the microbiome. The inbred piglet model represents a system that is comparable to human neonates and allows for control of the impact of maternal factors. Here we show that colonisation with a defined microbiota produces expansion of mucosal plasma cells and of T-lymphocytes without altering the repertoire of alpha beta T-cells in the intestine. Importantly, this is preceded by microbially-induced expansion of a signal regulatory protein α-positive (SIRPα(+)) antigen-presenting cell subset, whilst SIRPα(-)CD11R1(+) antigen-presenting cells (APCs) are unaffected by colonisation. The central role of intestinal APCs in the induction and maintenance of mucosal immunity implicates SIRPα(+) antigen-presenting cells as orchestrators of early-life mucosal immune development.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Linfocitos T CD4-Positivos
/
Inmunidad Mucosa
/
Mucosa Intestinal
/
Células Presentadoras de Antígenos
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
PLoS One
Asunto de la revista:
CIENCIA
/
MEDICINA
Año:
2012
Tipo del documento:
Article
País de afiliación:
Reino Unido