Abstract
We examined the patterns of host cell and virus deoxyribonucleic acid (DNA) synthesis in synchronized cultures of KB cells infected at different stages of the cell cycle with herpes simplex virus (HSV). We found that the initiation of HSV DNA synthesis, we well as the production of new infectious virus, is independent of the S, G1, and G2 phases of the mitotic cycle of the host cell. This is in contrast to data previously found with equine abortion virus. Because HSV replicates independently of the cell cycle, we were able to establish conditions that would permit the study of rates of HSV DNA synthesized in logarithmically growing cells in the virtual absence of cellular DNA synthesis. This eliminates the need for separation of viral and cellular DNA by isopycnic centrifugation in CsCl. We found that HSV DNA synthesis was initiated between 2 to 3 hr after infection. The rate of DNA synthesis increased rapidly, reaching a maximum 4 hr after infection, and decreased to 50% of maximum by 8 hr. Evidence is also presented which suggests that HSV infection can inhibit both the ongoing synthesis of host DNA as well as the initiation of the S phase.
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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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