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. 1993 Dec;67(12):6989–6994. doi: 10.1128/jvi.67.12.6989-6994.1993

Superinfection-induced apoptosis and its correlation with the reduction of viral progeny in cells persistently infected with Hz-1 baculovirus.

J C Lee 1, H H Chen 1, H L Wei 1, Y C Chao 1
PMCID: PMC238158  PMID: 8230422

Abstract

Differential induction of necrosis or apoptosis was found upon challenge of cells of the insect Spodoptera frugiperda productively or persistently infected with Hz-1 baculovirus, respectively. Unlike parental SF9 cells, which were essentially all killed by virally induced necrosis, persistently infected cells underwent a process of massive cell death by apoptosis; cells which were not killed by apoptosis then reestablished a cell monolayer. Upon viral challenge, the yield of viral progeny was reduced greatly in persistently virus-infected cells but not in parental cells. Immunolabelling of individual cells revealed that upon viral challenge, production of viral progeny was detectable only in necrotic cells and not in apoptotic cells. These results indicated that induction of apoptosis greatly reduces the yield of viral progeny in cells persistently infected with Hz-1 baculovirus. This is the first report of apoptosis induction in persistently infected cells upon viral superinfection.

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Selected References

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