DNGR-1 is dispensable for CD8(+) T-cell priming during respiratory syncytial virus infection
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Published version
Author(s)
Type
Journal Article
Abstract
During respiratory syncytial virus (RSV) infection CD8+ T cells both assist in viral clearance and contribute to immunopathology. CD8+ T cells recognize viral peptides presented by dendritic cells (DCs), which can directly present viral antigens when infected or, alternatively, “cross-present” antigens after endocytosis of dead or dying infected cells. Mouse CD8α+ and CD103+ DCs excel at cross-presentation, in part because they express the receptor DNGR-1 that detects dead cells by binding to exposed F-actin and routes internalized cell debris into the cross-presentation pathway. As RSV causes death in infected epithelial cells, we tested whether cross-presentation via DNGR-1 is necessary for CD8+ T-cell responses to the virus. DNGR-1-deficient or wild-type mice were intranasally inoculated with RSV and the magnitude of RSV-specific CD8+ T-cell induction was measured. We found that during live RSV infection, cross-presentation via DNGR-1 did not have a major role in the generation of RSV–specific CD8+ T-cell responses. However, after intranasal immunization with dead cells infected with RSV, a dependence on DNGR-1 for RSV-specific CD8+ T-cell responses was observed, confirming the ascribed role of the receptor. Thus, direct presentation by DCs may be the major pathway initiating CD8+ T-cell responses to RSV, while DNGR-1-dependent cross-presentation has no detectable role.
Date Issued
2014-08-01
Date Acceptance
2014-04-23
Citation
European Journal of Immunology, 2014, 44 (8), pp.2340-2348
ISSN
1521-4141
Publisher
Wiley-VCH Verlag
Start Page
2340
End Page
2348
Journal / Book Title
European Journal of Immunology
Volume
44
Issue
8
Copyright Statement
© 2014 The Authors.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Subjects
Science & Technology
Life Sciences & Biomedicine
Immunology
IMMUNOLOGY
CD8(+) T cell
Cross-presentation
DNGR-1
Lung infection
Virus
C-TYPE LECTIN
DENDRITIC CELLS
VIRAL-INFECTION
VACCINIA VIRUS
RECEPTOR
ANTIGEN
IMMUNITY
MICE
ENHANCEMENT
RESPONSES
Publication Status
Published