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J Virol. 1975 January; 15(1): 71-80

Effect of cytosine arabinoside on viral-specific protein synthesis in cells infected with herpes simplex virus.

ABSTRACT

The relationship between viral DNA and protein synthesis during herpes simplex virus type 1 (HSV-1) replication in HeLa cells was examined. Treatment of infected cells with cytosine arabinoside (ara-C), which inhibited the synthesis of HSV-1 DNA beyond the level of detection, markedly affected the types and amounts of viral proteins made in the infected cell. Although early HSV-1 proteins were synthesized normally, there was a rapid decline in total viral protein synthesis beginning 3 to 4 h after infection. This is the time that viral DNA synthesis would normally have been initiated. ara-C also prevented the normal shift from early to late viral protein synthesis. Finally, it was shown that the effect of ara-C on late protein synthesis was dependent upon the time after infection that the drug was added. These results suggest that inhibition of progeny viral DNA synthesis by ara-C prevents the "turning on" of late HSV-1 protein synthesis but allows early translation to be "switched off."

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