T Cell Factor 1-Expressing Memory-like CD8(+) T Cells Sustain the Immune Response to Chronic Viral Infections.
Immunity
; 45(2): 415-27, 2016 08 16.
Article
em En
| MEDLINE
| ID: mdl-27533016
ABSTRACT
Chronic infections promote the terminal differentiation (or "exhaustion") of T cells and are thought to preclude the formation of memory T cells. In contrast, we discovered a small subpopulation of virus-specific CD8(+) T cells that sustained the T cell response during chronic infections. These cells were defined by, and depended on, the expression of the transcription factor Tcf1. Transcriptome analysis revealed that this population shared key characteristics of central memory cells but lacked an effector signature. Unlike conventional memory cells, Tcf1-expressing T cells displayed hallmarks of an "exhausted" phenotype, including the expression of inhibitory receptors such as PD-1 and Lag-3. This population was crucial for the T cell expansion that occurred in response to inhibitory receptor blockade during chronic infection. These findings identify a memory-like T cell population that sustains T cell responses and is a prime target for therapeutic interventions to improve the immune response in chronic infections.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Hepacivirus
/
Linfócitos T CD8-Positivos
/
Hepatite C Crônica
/
Fator 1 de Transcrição de Linfócitos T
/
Imunoterapia
/
Coriomeningite Linfocítica
/
Vírus da Coriomeningite Linfocítica
Tipo de estudo:
Prognostic_studies
Limite:
Adult
/
Animals
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article