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- W2065794983 abstract "The matrix protein (M1) of influenza virus plays an essential role in viral replication. Our previous studies have shown that basic amino acids 101RKLKR105 of M1 are involved in RNP binding and nuclear localization. For the present work, the functions of 101RKLKR105 were studied by introducing mutations into the M gene of influenza virus A/WSN/33 by reverse genetic methods. Individual substitution, R101S or R105S, had a minimal effect on viral replication. In contrast, the double mutation R101S-R105S was synergistic and resulted in temperature sensitivity reflected by reduced viral replication at a restrictive temperature. To investigate the in vivo effect on infection, BALB/c mice were infected with either A/WSN/33 wild-type (Wt) or mutant viruses and assessed for signs of illness, viral replication in the lungs, and survival rates. The results from mouse studies indicated that the R101S-R105S double mutant virus was strongly attenuated, while single mutant viruses R101S and R105S were minimally attenuated compared to A/WSN33 Wt under the same conditions. In challenge studies, mice immunized by infection with R101S-R105S were fully protected from lethal challenge with A/WSN/33. The replication and attenuating properties of R101S-R105S suggest its potential in development of live influenza virus vaccines." @default.
- W2065794983 created "2016-06-24" @default.
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- W2065794983 date "2005-02-01" @default.
- W2065794983 modified "2023-10-02" @default.
- W2065794983 title "Attenuating Mutations of the Matrix Gene of Influenza A/WSN/33 Virus" @default.
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- W2065794983 doi "https://doi.org/10.1128/jvi.79.3.1918-1923.2005" @default.
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