Rescue of synthetic salmonid rhabdovirus minigenomes

S. Biacchesi, Y. X. Yu, M. Bearzotti, C. Tafalla, M. Fernandez-Alonso, M. Bremont

Research output: Contribution to journalArticle

Abstract

Synthetic T7-driven cDNA minigenomes containing the bacterial chloramphenicol acetyltransferase gene as a reporter were derived from the genome of two salmonid novirhabdoviruses, infectious haematopoietic necrosis virus (IHNV) and viral haemorrhagic septicaemia virus (VHSV). We showed that an exogenous IHNV RNA minigenome transfected into fish cells could be rescued following IHNV infection as it was replicated, encapsidated and transcribed. When cells were infected with a recombinant vaccinia virus expressing T7 RNA polymerase (vTF7-3), transfected with the plasmid carrying the IHNV minigenome (genomic- and anti-genomic-sense) and superinfected with IHNV, rescue of the minigenome was more efficient. Heterologous VHSV/IHNV rescue experiments failed. Finally, when the IHNV N, P and L proteins were expressed from cDNAs in cells, the minigenome was also successfully rescued, indicating that the nucleocapsid proteins were biologically functional. These data represent the first example of rescue experiments for non-mammalian rhabdoviruses replicating at a low temperature.

Original languageEnglish (US)
Pages (from-to)1941-1945
Number of pages5
JournalJournal of General Virology
Volume81
Issue number8
DOIs
StatePublished - Jan 1 2000

ASJC Scopus subject areas

  • Virology

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    Biacchesi, S., Yu, Y. X., Bearzotti, M., Tafalla, C., Fernandez-Alonso, M., & Bremont, M. (2000). Rescue of synthetic salmonid rhabdovirus minigenomes. Journal of General Virology, 81(8), 1941-1945. https://doi.org/10.1099/0022-1317-81-8-1941