1887

Abstract

SUMMARY

Chinese hamster kidney cells are semi-permissive to simian virus 40 (SV40). Exposure to mitomycin C (MC) of Chinese hamster kidney cells infected with SV40 DNA enhanced the yield of infectious virus 10- to 100-fold. This stimulation occurred whether the treatment was performed before or after infection. A simultaneous increase in the number of V antigen-synthesizing cells and virus-producing cells, as well as the virus burst size, was observed upon MC pretreatment, whereas the proportion of T antigen-synthesizing cells remained unchanged. MC pretreatment clearly stimulated virus DNA replication in SV40 virus-infected cells. Cells treated with MC exhibited an unbalanced growth pattern, with continuing protein synthesis in the absence of cell division and a markedly reduced ability to replicate the cellular DNA. These results suggest that MC enhances the permissiveness of Chinese hamster kidney cells by inducing the synthesis of a specific cellular factor(s) required for SV40 replication in these cells. Exposure to ultraviolet light also enhanced infectious virus production in Chinese hamster kidney cells.

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/content/journal/jgv/10.1099/0022-1317-36-1-137
1977-07-01
2021-10-23
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