NDLI: Properties of a unique mutant of Helicoverpa armigera single-nucleocapsid nucleopolyhedrovirus that exhibits a partial many polyhedra and few polyhedra phenotype on extended serial passaging in suspension cell cultures

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Properties of a unique mutant of Helicoverpa armigera single-nucleocapsid nucleopolyhedrovirus that exhibits a partial many polyhedra and few polyhedra phenotype on extended serial passaging in suspension cell cultures

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Properties of a unique mutant of Helicoverpa armigera single-nucleocapsid nucleopolyhedrovirus that exhibits a partial many polyhedra and few polyhedra phenotype on extended serial passaging in suspension cell cultures

Content Provider	Springer Nature Link
Author	Pedrini, Márcia R. S. Nielsen, Lars K. Reid, Steven Chan, Leslie C. L.
Copyright Year	2005
Abstract	Serial passaging of wild-type Helicoverpa armigera single-nucleocapsid nucleopolyhedrovirus (HaSNPV) in H. zea (Hz-AM1) insect cell cultures results in rapid selection for the few polyhedra (FP) phenotype. A unique HaSNPV mutant (ppC19) was isolated through plaque purification that exhibited a partial many polyhedra (MP) and FP phenotype. On serial passaging in suspension cell cultures, ppC19 produced fivefold more polyhedra than a typical FP mutant (FP8AS) but threefold less polyhedra than the wild-type virus. Most importantly, the polyhedra of ppC19 exhibited MP-like virion occlusion. Furthermore, ppC19 produced the same amount of budded virus (BV) as the FP mutant, which was fivefold higher than that of the wild-type virus. This selective advantage was likely to explain its relative stability in polyhedra production for six passages when compared with the wild-type virus. However, subsequent passaging of ppC19 resulted in a steep decline in both BV and polyhedra yields, which was also experienced by FP8AS and the wild-type virus at high passage numbers. Genomic deoxyribonucleic acid profiling of the latter suggested that defective interfering particles (DIPs) were implicated in this phenomenon and represented another undesirable mutation during serial passaging of HaSNPV. Hence, a strategy to isolate HaSNPV clones that exhibited MP-like polyhedra production but FP-like BV production, coupled with low multiplicities of infection during scale-up to avoid accumulation of DIPs, could prove commercially invaluable.
Starting Page	289
Ending Page	297
Page Count	9
File Format	PDF
ISSN	10712690
Journal	In Vitro Cellular & Developmental Biology - Animal
Volume Number	41
Issue Number	8-9
e-ISSN	1543706X
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	insect cells HaSNPV plaque purification defective interfering particles Cell Biology Developmental Biology Animal Genetics and Genomics Animal Biochemistry Animal Physiology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Developmental Biology Medicine

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Properties of a unique mutant of Helicoverpa armigera single-nucleocapsid nucleopolyhedrovirus that exhibits a partial many polyhedra and few polyhedra phenotype on extended serial passaging in suspension cell cultures

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