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. 1984 Nov;4(11):2341–2346. doi: 10.1128/mcb.4.11.2341

Enhanced reactivation and enhanced mutagenesis of herpes simplex virus in normal human and xeroderma pigmentosum cells.

P J Abrahams, B A Huitema, A J van der EB
PMCID: PMC369063  PMID: 6096694

Abstract

Enhanced reactivation (ER) and enhanced mutagenesis (EM) of herpes simplex virus type 1 were studied simultaneously in UV-irradiated stationary cultures of diploid normal human and xeroderma pigmentosum (XP) fibroblasts. Mutagenesis was assayed with unirradiated herpes simplex virus type 1 as a probe in a forward mutation assay (resistance to iododeoxycytidine). Dose-response studies showed that ER increased with the UV dose given to the virus. Optimal reactivation levels were obtained when normal cells and XP variant cells were exposed to a UV dose of 8 J . m-2 and the virus was irradiated with 150 J . m-2. Repair-deficient XP cells of complementation groups A, C, and D showed optimal reactivation levels with a UV dose to the cells of 1.0 J . m-2 and a UV dose to the virus of 40 J . m-2. The time course of appearance of ER and EM was also studied, both in the normal and XP cells. In all cell types except the XP variant cells, EM followed similar kinetics of appearance as did ER. Maximal activities occurred when infection was delayed 1 or 2 days after cell treatment. In XP variant cells, however, maximal expression of the EM function was significantly delayed with respect to ER. The results indicate that ER and EM are transiently expressed in normal and repair-deficient XP cells. Although both phenomena may be triggered by the same cellular event, ER and EM appear to be separate processes that occur independently of each other.

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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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