Abstract:
:Infections with influenza and respiratory syncytial virus (RSV) rank high among the most common human respiratory diseases worldwide. Previously, we developed a replication-incompetent influenza virus by replacing the coding sequence of the PB2 gene, which encodes one of the viral RNA polymerase subunits, with that of a reporter gene. Here, we generated a PB2-knockout recombinant influenza virus expressing the F protein of RSV (PB2-RSVF virus) and tested its potential as a bivalent vaccine. In mice intranasally immunized with the PB2-RSVF virus, we detected high levels of antibodies against influenza virus, but not RSV. PB2-RSVF virus-immunized mice were protected from a lethal challenge with influenza virus but experienced severe body weight loss when challenged with RSV, indicating that PB2-RSVF vaccination enhanced RSV-associated disease. These results highlight one of the difficulties of developing an effective bivalent vaccine against influenza virus and RSV infections.
journal_name
Arch Viroljournal_title
Archives of virologyauthors
Fonseca W,Ozawa M,Hatta M,Orozco E,Martínez MB,Kawaoka Ydoi
10.1007/s00705-013-1932-zsubject
Has Abstractpub_date
2014-05-01 00:00:00pages
1067-77issue
5eissn
0304-8608issn
1432-8798journal_volume
159pub_type
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