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Recombinant influenza virus carrying the respiratory syncytial virus (RSV) F85-93 CTL epitope reduces RSV replication in mice

Sarah De Baets (UGent) , Bert Schepens (UGent) , Koen Sedeyn (UGent) , Michael Schotsaert (UGent) , Kenny Roose (UGent) , Pieter Bogaert (UGent) , Walter Fiers and Xavier Saelens (UGent)
(2013) JOURNAL OF VIROLOGY. 87(6). p.3314-3323
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Abstract
Respiratory syncytial virus (RSV) is the leading cause of lower respiratory tract infections in infants worldwide. Despite decades of research, there is still no registered vaccine available for this major pathogen. We investigated the protective efficacy of a recombinant influenza virus, PR8/NA-F85-93, that carries the RSV CD8(+) T cell epitope F85-93 in its neuraminidase stalk. F85-93-specific cytotoxic T lymphocytes (CTLs) were induced in mice after a single intranasal immunization with PR8/NA-F85-93 virus, and these CTLs provided a significant reduction in the lung viral load upon a subsequent challenge with RSV. To avoid influenza-induced morbidity, we treated mice with matrix protein 2 (M2e)-specific monoclonal antibodies before PR8/NA-F85-93 virus infection. Treatment with anti-M2e antibodies reduced the infiltration of immune cells in the lungs upon PR8/NA-F85-93 infection, whereas the formation of inducible bronchus-associated lymphoid tissue was not affected. Moreover, this treatment prevented body weight loss yet still permitted the induction of RSV F-specific T cell responses and significantly reduced RSV replication upon challenge. These results demonstrate that it is possible to take advantage of the infection-permissive protection of M2e-specific antibodies against influenza A virus to induce heterologous CD8(+) T cell-mediated immunity by an influenza A virus vector expressing the RSV F85-93 epitope.
Keywords
PULMONARY EOSINOPHILIA, CD8 T-CELLS, PRIMARY INFECTION, PROTECTION, RESPONSES, IMMUNITY, PROTEIN, LUNG, IMMUNOPATHOLOGY, VACCINE-ENHANCED DISEASE

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Chicago
De Baets, Sarah, Bert Schepens, Koen Sedeyn, Michael Schotsaert, Kenny Roose, Pieter Bogaert, Walter Fiers, and Xavier Saelens. 2013. “Recombinant Influenza Virus Carrying the Respiratory Syncytial Virus (RSV) F85-93 CTL Epitope Reduces RSV Replication in Mice.” Journal of Virology 87 (6): 3314–3323.
APA
De Baets, Sarah, Schepens, B., Sedeyn, K., Schotsaert, M., Roose, K., Bogaert, P., Fiers, W., et al. (2013). Recombinant influenza virus carrying the respiratory syncytial virus (RSV) F85-93 CTL epitope reduces RSV replication in mice. JOURNAL OF VIROLOGY, 87(6), 3314–3323.
Vancouver
1.
De Baets S, Schepens B, Sedeyn K, Schotsaert M, Roose K, Bogaert P, et al. Recombinant influenza virus carrying the respiratory syncytial virus (RSV) F85-93 CTL epitope reduces RSV replication in mice. JOURNAL OF VIROLOGY. 2013;87(6):3314–23.
MLA
De Baets, Sarah, Bert Schepens, Koen Sedeyn, et al. “Recombinant Influenza Virus Carrying the Respiratory Syncytial Virus (RSV) F85-93 CTL Epitope Reduces RSV Replication in Mice.” JOURNAL OF VIROLOGY 87.6 (2013): 3314–3323. Print.
@article{3177540,
  abstract     = {Respiratory syncytial virus (RSV) is the leading cause of lower respiratory tract infections in infants worldwide. Despite decades of research, there is still no registered vaccine available for this major pathogen. We investigated the protective efficacy of a recombinant influenza virus, PR8/NA-F85-93, that carries the RSV CD8(+) T cell epitope F85-93 in its neuraminidase stalk. F85-93-specific cytotoxic T lymphocytes (CTLs) were induced in mice after a single intranasal immunization with PR8/NA-F85-93 virus, and these CTLs provided a significant reduction in the lung viral load upon a subsequent challenge with RSV. To avoid influenza-induced morbidity, we treated mice with matrix protein 2 (M2e)-specific monoclonal antibodies before PR8/NA-F85-93 virus infection. Treatment with anti-M2e antibodies reduced the infiltration of immune cells in the lungs upon PR8/NA-F85-93 infection, whereas the formation of inducible bronchus-associated lymphoid tissue was not affected. Moreover, this treatment prevented body weight loss yet still permitted the induction of RSV F-specific T cell responses and significantly reduced RSV replication upon challenge. These results demonstrate that it is possible to take advantage of the infection-permissive protection of M2e-specific antibodies against influenza A virus to induce heterologous CD8(+) T cell-mediated immunity by an influenza A virus vector expressing the RSV F85-93 epitope.},
  author       = {De Baets, Sarah and Schepens, Bert and Sedeyn, Koen and Schotsaert, Michael and Roose, Kenny and Bogaert, Pieter and Fiers, Walter and Saelens, Xavier},
  issn         = {0022-538X},
  journal      = {JOURNAL OF VIROLOGY},
  keywords     = {PULMONARY EOSINOPHILIA,CD8 T-CELLS,PRIMARY INFECTION,PROTECTION,RESPONSES,IMMUNITY,PROTEIN,LUNG,IMMUNOPATHOLOGY,VACCINE-ENHANCED DISEASE},
  language     = {eng},
  number       = {6},
  pages        = {3314--3323},
  title        = {Recombinant influenza virus carrying the respiratory syncytial virus (RSV) F85-93 CTL epitope reduces RSV replication in mice},
  url          = {http://dx.doi.org/10.1128/JVI.03019-12},
  volume       = {87},
  year         = {2013},
}

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