Cutting edge: resident memory CD8 T cells occupy frontline niches in secondary lymphoid organs.
J Immunol
; 192(7): 2961-4, 2014 Apr 01.
Article
em En
| MEDLINE
| ID: mdl-24600038
ABSTRACT
Resident memory CD8 T cells (TRM) are a nonrecirculating subset positioned in nonlymphoid tissues to provide early responses to reinfection. Although TRM are associated with nonlymphoid tissues, we asked whether they populated secondary lymphoid organs (SLO). We show that a subset of virus-specific memory CD8 T cells in SLO exhibit phenotypic signatures associated with TRM, including CD69 expression. Parabiosis revealed that SLO CD69(+) memory CD8 T cells do not circulate, defining them as TRM. SLO TRM were overrepresented in IL-15-deficient mice, suggesting independent regulation compared with central memory CD8 T cells and effector memory CD8 T cells. These cells were positioned at SLO entry points for peripheral Ags the splenic marginal zone, red pulp, and lymph node sinuses. Consistent with a potential role in guarding SLO pathogen entry points, SLO TRM did not vacate their position in response to peripheral alarm signals. These data extend the range of tissue resident memory to SLO.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Linfócitos T CD8-Positivos
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Memória Imunológica
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Coriomeningite Linfocítica
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Vírus da Coriomeningite Linfocítica
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Tecido Linfoide
Limite:
Animals
Idioma:
En
Revista:
J Immunol
Ano de publicação:
2014
Tipo de documento:
Article