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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

In vitro inhibition of fish rhabdoviruses by Japanese flounder, Paralichthys olivaceus Mx.

A homologous fish cell line stably expressing the recombinant Japanese flounder Mx (JFMx) was infected with hirame rhabdovirus (HIRRV) and viral hemorrhagic septicemia virus (VHSV), both of which are negative single-stranded RNA viruses belonging to the Rhabdoviridae family. Analysis of primary transcription of the two rhabdoviruses showed that there was lower expression level and copy number of the viral nucleoprotein transcript in the JFMx-transfected cell line than the infected, control cells, although no significant difference was observed. This suggests that JFMx may not be a potent inhibitor of rhabdoviral primary transcription. Kinetics of rhabdovirus expression by RT-PCR and quantitative real-time RT-PCR showed reduced levels of the rhabdoviral glycoprotein and nucleoprotein transcripts over time, indicating the possible role of JFMx in blocking rhabdoviral replication by interfering with the transcription of the viral subgenomic mRNAs. Significant inhibition in rhabdovirus replication consequently resulted in the synthesis of fewer viral particles. This may explain why JFMx-expressing cells are less susceptible to virus-induced cell lysis, and thus, why they would have a significantly higher survival than the infected, control cells. These results provide direct evidence that JFMx has an antiviral effect in vitro.[1]

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