A Chimeric Pneumovirus Fusion Protein Carrying Neutralizing Epitopes of Both MPV and RSV

Xiaolin Wen, Jennifer Pickens, Jarrod J. Mousa, George P. Leser, Robert A. Lamb, James E. Crowe, Theodore S. Jardetzky*

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Respiratory syncytial virus (RSV) and human metapneumovirus (HMPV) are paramyxoviruses that are responsible for substantial human health burden, particularly in children and the elderly. The fusion (F) glycoproteins are major targets of the neutralizing antibody response and studies have mapped dominant antigenic sites in F. Here we grafted a major neutralizing site of RSV F, recognized by the prophylactic monoclonal antibody palivizumab, onto HMPV F, generating a chimeric protein displaying epitopes of both viruses. We demonstrate that the resulting chimeric protein (RPM-1) is recognized by both anti-RSV and anti-HMPV F neutralizing antibodies indicating that it can be used to map the epitope specificity of antibodies raised against both viruses. Mice immunized with the RPM-1 chimeric antigen generate robust neutralizing antibody responses to MPV but weak or no cross-reactive recognition of RSV F, suggesting that grafting of the single palivizumab epitope stimulates a comparatively limited antibody response. The RPM-1 protein provides a new tool for characterizing the immune responses resulting from RSV and HMPV infections and provides insights into the requirements for developing a chimeric subunit vaccine that could induce robust and balanced immunity to both virus infections.

Original languageEnglish (US)
Article numbere0155917
JournalPloS one
Volume11
Issue number5
DOIs
StatePublished - May 2016

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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    Wen, X., Pickens, J., Mousa, J. J., Leser, G. P., Lamb, R. A., Crowe, J. E., & Jardetzky, T. S. (2016). A Chimeric Pneumovirus Fusion Protein Carrying Neutralizing Epitopes of Both MPV and RSV. PloS one, 11(5), [e0155917]. https://doi.org/10.1371/journal.pone.0155917