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. 1969 Oct;4(4):348–355. doi: 10.1128/jvi.4.4.348-355.1969

Response of Simian Virus 40-Transformed Cell Lines and Cell Hybrids to Superinfection with Simian Virus 40 and Its Deoxyribonucleic Acid

Peter Swetly 1,1, Giuseppe Barbanti Brodano 1,2, Barbara Knowles 1, Hilary Koprowski 1
PMCID: PMC375881  PMID: 4186276

Abstract

Whereas normal human and monkey cells were susceptible both to intact simian virus 40 (SV40) and to SV40 deoxyribonucleic acid (DNA), human and monkey cells transformed by SV40 were incapable of producing infectious virus after exposure to SV40, but displayed susceptibility to SV40 DNA. On the other hand, mouse and hamster cells, either normal or SV40-transformed, were resistant both to the virus and to SV40 DNA. Hybrids between permissive and nonpermissive parental cells revealed a complex response: whereas most hybrids tested were resistant, three of them produced a small amount of infectious virus upon challenge with SV40 DNA. All were resistant to whole virus challenge. The persistence of infectious SV40 DNA in permissive and nonpermissive cells up to 96 hr after infection was ascertained by cell fusion. The decay kinetics proved to be quite different in permissive and nonpermissive cells. Adsorption of SV40 varied widely among the different cell lines. Very low adsorption of SV40 was detected in nonsusceptible cells with the exception of the mKS-BU100 cell line. A strong increase in SV40 adsorption was produced by pretreating cells with polyoma virus. In spite of this increased adsorption, the resistance displayed by SV40-transformed cells to superinfection with the virus was maintained.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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