Selective imprinting of gut-homing T cells by Peyer's patch dendritic cells.
Nature
; 424(6944): 88-93, 2003 Jul 03.
Article
em En
| MEDLINE
| ID: mdl-12840763
ABSTRACT
Whereas naive T cells migrate only to secondary lymphoid organs, activation by antigen confers to T cells the ability to home to non-lymphoid sites. Activated effector/memory T cells migrate preferentially to tissues that are connected to the secondary lymphoid organs where antigen was first encountered. Thus, oral antigens induce effector/memory cells that express essential receptors for intestinal homing, namely the integrin alpha4beta7 and CCR9, the receptor for the gut-associated chemokine TECK/CCL25 (refs 6, 8, 9). Here we show that this imprinting of gut tropism is mediated by dendritic cells from Peyer's patches. Stimulation of CD8-expressing T cells by dendritic cells from Peyer's patches, peripheral lymph nodes and spleen induced equivalent activation markers and effector activity in T cells, but only Peyer's patch dendritic cells induced high levels of alpha4beta7, responsiveness to TECK and the ability to home to the small intestine. These findings establish that Peyer's patch dendritic cells imprint gut-homing specificity on T cells, and thus license effector/memory cells to access anatomical sites most likely to contain their cognate antigen.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Nódulos Linfáticos Agregados
/
Células Dendríticas
/
Quimiotaxia de Leucócito
/
Linfócitos T CD8-Positivos
/
Intestino Delgado
Limite:
Animals
Idioma:
En
Revista:
Nature
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Estados Unidos