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Stahl, F.R.* ; Heller, K.* ; Halle, S.* ; Keyser, K.A.* ; Busche, A.* ; Marquardt, A.* ; Wagner, K.* ; Boelter, J.* ; Bischoff, Y.* ; Kremmer, E. ; Arens, R.* ; Messerle, M.* ; Forster, R.*

Nodular inflammatory foci are sites of T cell priming and control of murine cytomegalovirus infection in the neonatal lung.

PLoS Pathog. 9:e1003828 (2013)

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Neonates, including mice and humans, are highly susceptible to cytomegalovirus (CMV) infection. However, many aspects of neonatal CMV infections such as viral cell tropism, spatio-temporal distribution of the pathogen as well as genesis of antiviral immunity are unknown. With the use of reporter mutants of the murine cytomegalovirus (MCMV) we identified the lung as a primary target of mucosal infection in neonatal mice. Comparative analysis of neonatal and adult mice revealed a delayed control of virus replication in the neonatal lung mucosa explaining the pronounced systemic infection and disease in neonates. This phenomenon was supplemented by a delayed expansion of CD8(+) T cell clones recognizing the viral protein M45 in neonates. We detected viral infection at the single-cell level and observed myeloid cells forming "nodular inflammatory foci" (NIF) in the neonatal lung. Co-localization of infected cells within NIFs was associated with their disruption and clearance of the infection. By 2-photon microscopy, we characterized how neonatal antigen-presenting cells (APC) interacted with T cells and induced mature adaptive immune responses within such NIFs. We thus define NIFs of the neonatal lung as niches for prolonged MCMV replication and T cell priming but also as sites of infection control.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Subcapsular Sinus Macrophages; Natural-killer-cells; Class-i Complexes; Mouse Cytomegalovirus; Interstitial Pneumonia; Immune Evasion; Virus; Mice; Pathogenesis; Model

ISSN (print) / ISBN 1553-7366

e-ISSN 1553-7374

Journal PLoS Pathogens

Quellenangaben Volume: 9, Issue: 12, Article Number: e1003828

Publisher Public Library of Science (PLoS)

Publishing Place San Francisco

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Molecular Immunology (IMI)