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Archives of Virology (2012) 157, 1875-1885
Tamer Z. Salem, Xin-Hua Cheng and Xiao-Wen Cheng (2012)
AcMNPV enhances infection by ThorNPV in Sf21 cells and SeMNPV in Hi5 cells
Archives of Virology 157 (10), 1875-1885
Abstract: An expression cassette containing the DsRed2 gene, which encodes the red fluorescent protein (RFP), was inserted into the wide-host-range Autographa californica M nucleopolyhedrovirus (AcMNPV) at the polyhedrin locus (vAcDsRed2). An expression cassette containing the enhanced green fluorescent protein (EGFP) gene was inserted at the gp37 locus of the narrow-host-range Thysanoplusia orichalcea MNPV (ThorMNPV) and the p10 locus of Spodoptera exigua MNPV (SeMNPV) to produce vThGFP and vSeGFP, respectively. vThGFP and vSeGFP are poor at infecting Sf21 and Hi5 cells, respectively, whereas vAcDsRed2 is highly infectious to both cell lines. During co-infection, vAcDsRed2 enhanced vThGFP infection in Sf21 cells by approximately 20-fold, and it enhanced vSeGFP infection in Hi5 cells by more than 300-fold, as detected by fluorescence measurements. In contrast, vThGFP reduced vAcDsRed2 infection by 5.4-fold in Sf21 cells, while vSeGFP reduced vAcDsRed2 by 3.2-fold in Hi5 cells. Plaque assay data did not suggest viral recombination, but vThGFP plaques surrounded by vAcDsRed2 plaques were observed. A viral DNA replication assay performed by real-time quantitative PCR suggested that the detected fluorescence correlated with virus replication. Sf21 cells infected with vAcDsRed2 were resistant to superinfection by viruses of the same type expressing EGFP (vAcGFP). These results demonstrated that AcMNPV could enhance replication of ThorMNPV and SeMNPV in non-permissive cells without recombination.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Xiao Wen Cheng
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
molecular biology - genes
Pest and/or beneficial records:
Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
---|---|---|---|---|
Alphabaculovirus aucalifonicae (entomopathogen) | ||||
Alphabaculovirus spexiguae (entomopathogen) | ||||
Alphabaculovirus thorichlaceae (entomopathogen) |