T Abe, T Mizuta, S Suzuki, T Hatta, K Takai, T Yokota, H Takaku
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In vitro and in vivo anti-influenza A virus activity of antisense oligonucleotides.
We have demonstrated that antisense phosphorothioate oligonucleotides (S-ODNs) inhibit influenza virus A replication in MDCK cells. The liposomally encapsulated and the free antisense phosphorothioate oligonucleotides with four target sites (PB1, PB2, PA, and NP) were tested for their abilities to inhibit virus-induced cytopathogenic effects by a MTT assay using MDCK cells. The liposomally encapsulated S-ODN complementary to the sites of the PB2-AUG initiation codon showed highly inhibitory effects. Therefore, the antiviral effects of S-ODN-PB2-AUG and PA-AUG were examined in a mouse model of influenza virus A infection. PB2-AUG oligomer treated i.v. significantly prolonged the mean survival time in day (MDS) and increased the survival rates with does dependent manner.
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