A recombinant influenza virus vaccine expressing the F protein of respiratory syncytial virus.
A recombinant influenza virus vaccine expressing the F protein of respiratory syncytial virus.
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DOI:
10.1007/s00705-013-1932-z
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发表时间:
2014-05
影响因子:
2.7
通讯作者:
Kawaoka, Yoshihiro
中科院分区:
文献类型:
--
作者:
Fonseca, Wendy;Ozawa, Makoto;Hatta, Masato;Orozco, Esther;Martinez, Maximo B.;Kawaoka, Yoshihiro
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.
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