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J Virol Methods. 2010 Oct;169(1):112-8. doi: 10.1016/j.jviromet.2010.07.006. Epub 2010 Jul 14.

Development of an optimized RNA-based murine norovirus reverse genetics system.

Author information

1
Calicivirus Research Group, Section of Virology, Faculty of Medicine, Imperial College London, Norfolk Place, London W2 1PG, UK.

Abstract

Murine norovirus (MNV), identified in 2003, is the only norovirus which replicates efficiently in tissue culture and as a result has been used extensively as a model for human noroviruses, a major cause of acute gastroenteritis. The current report describes the generation of a new approach to reverse genetics recovery of genetically defined MNV that relies on the transfection of in vitro transcribed capped RNA directly into cells. The use of the recently developed ScriptCap post-transcriptional enzymatic capping system, followed by optimized Neon mediated electroporation of the highly permissive RAW 264.7 cells, resulted in the rapid and robust recovery of infectious MNV. Transfection of cells capable of supporting virus replication but not permissive to virus infection, namely human or hamster kidney cells, also resulted in robust recovery of infectious virus without subsequent amplification by multiple rounds of re-infection. This latter system may provide a reproducible method to measure the specific infectivity of mutant norovirus RNA allowing the accurate quantitation of the effect of mutations on norovirus replication.

PMID:
20637238
PMCID:
PMC2989447
DOI:
10.1016/j.jviromet.2010.07.006
[Indexed for MEDLINE]
Free PMC Article

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