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. 1977 May;22(2):256–266. doi: 10.1128/jvi.22.2.256-266.1977

Properties of permissive monkey cells transformed by UV-irradiated simian virus 40.

Y Gluzman, J Davison, M Oren, E Winocour
PMCID: PMC515714  PMID: 194053

Abstract

African green monkey cells (CV1 line) were infected with UV-irradiated simian virus 40 (SV40), and permissive lines of stably transformed cells were established. These cell lines display the SV40 T-antigen and the growth characteristics typical of nonpermissive transformed cells (e.g., reduced cell density inhibition, reduced serum dependence, ability to overgrow normal cells, and colony formation in soft agar). The level of permissiveness to superinfecting SV40 is fully comparable with that of nontransformed CV1 and BSC-1 lines. The transformed monkey lines also support SV40 plaque production under agar. By Cot analysis, the transformed permissive cells contain, on an average, 1 to 2 SV40 genome equivalents, and the majority of the viral sequences are associated with the high-molecular-weight cellular DNA. No spontaneous production of infectious SV40 has been observed. The transformed permissive monkey cells failed to support the replication of SV40 tsA mutants at the restrictive temperature. To account for this, it is suggested that the gene A product has separate functions for transformation and initiation of viral DNA synthesis, and only the former function is expressed in the transformed permissive monkey cells.

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Selected References

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