Superior induction and maintenance of protective CD8 T cells in mice infected with mouse cytomegalovirus vector expressing RAE-1γ.
Proc Natl Acad Sci U S A
; 110(41): 16550-5, 2013 Oct 08.
Article
em En
| MEDLINE
| ID: mdl-24052528
ABSTRACT
Due to a unique pattern of CD8 T-cell response induced by cytomegaloviruses (CMVs), live attenuated CMVs are attractive candidates for vaccine vectors for a number of clinically relevant infections and tumors. NKG2D is one of the most important activating NK cell receptors that plays a role in costimulation of CD8 T cells. Here we demonstrate that the expression of CD8 T-cell epitope of Listeria monocytogenes by a recombinant mouse CMV (MCMV) expressing the NKG2D ligand retinoic acid early-inducible protein 1-gamma (RAE-1γ) dramatically enhanced the effectiveness and longevity of epitope-specific CD8 T-cell response and conferred protection against a subsequent challenge infection with Listeria monocytogenes. Unexpectedly, the attenuated growth in vivo of the CMV vector expressing RAE-1γ and its capacity to enhance specific CD8 T-cell response were preserved even in mice lacking NKG2D, implying additional immune function for RAE-1γ beyond engagement of NKG2D. Thus, vectors expressing RAE-1γ represent a promising approach in the development of CD8 T-cell-based vaccines.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Vacinas Sintéticas
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Linfócitos T CD8-Positivos
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Citomegalovirus
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Evasão da Resposta Imune
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Vetores Genéticos
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Proteínas de Membrana
Limite:
Animals
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article