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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Immunol
2014 ; 193
(8
): 4169-77
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Prolonged antigen presentation following an acute virus infection requires direct
and then cross-presentation
#MMPMID25225666
Heipertz EL
; Davies ML
; Lin E
; Norbury CC
J Immunol
2014[Oct]; 193
(8
): 4169-77
PMID25225666
show ga
Antiviral CD8(+) T cell recognition of MHC class I-peptide complexes on the
surface of professional APCs is a requisite step in an effective immune response
following many potentially lethal infections. Although MHC class I-peptide
production is thought to be closely linked to the continued presence of virus,
several studies have shown that the persistence of Ag presentation occurs for an
extended period of time following the clearance of RNA viruses. However, the
mechanism responsible for Ag presentation persistence following viral clearance
was unknown until now. In this study, we used a recombinant DNA virus expressing
different forms of a model Ag to study the mechanism of prolonged Ag presentation
in mice. We determined that the persistence of Ag presentation consists of three
distinct mechanistic phases, as follows: ongoing viral replication, persistence
of virally infected cells, and cross-presentation of Ag. These data will allow
manipulation of the form of Ag contained within viral vectors to produce the most
effective and protective CD8(+) T cell response to be generated following
vaccination.
|Animals
[MESH]
|Antigen Presentation/*immunology
[MESH]
|Antigen-Presenting Cells/*immunology
[MESH]
|Antigens, Viral/*immunology
[MESH]
|CD8-Positive T-Lymphocytes/*immunology
[MESH]
|Cells, Cultured
[MESH]
|Cross-Priming/immunology
[MESH]
|Histocompatibility Antigens Class I/immunology
[MESH]