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. 1997 Jul;71(7):5268-76.
doi: 10.1128/JVI.71.7.5268-5276.1997.

Gene expression during reactivation of herpes simplex virus type 1 from latency in the peripheral nervous system is different from that during lytic infection of tissue cultures

R Tal-Singer  1 , T M Lasner, W Podrzucki, A Skokotas, J J Leary, S L Berger, N W Fraser
Affiliations

Gene expression during reactivation of herpes simplex virus type 1 from latency in the peripheral nervous system is different from that during lytic infection of tissue cultures

R Tal-Singer et al. J Virol. 1997 Jul.

Abstract

Herpes simplex virus (HSV) replicates in peripheral tissues and forms latent infections in neurons of the peripheral nervous system. It can be reactivated from latency by various stimuli to cause recurrent disease. During lytic infection in tissue culture cells, there is a well-described temporal pattern of (i) immediate-early, (ii) early, and (iii) late gene expression. However, latency is characterized by little if any expression of genes of the lytic cycle of infection. During reactivation, the pattern of gene expression is presumed to be similar to that during the lytic cycle in tissue culture, though recent work of W. P. Halford et al. (J. Virol. 70:5051-5060, 1996) and P. F. Nichol et al. (J. Virol. 70:5476-5486, 1996) suggests that it is modified in neuronal cell cultures. We have used the mouse trigeminal ganglion explant model and reverse transcription-PCR to determine the pattern of viral and cellular gene expression during reactivation. Surprisingly, the pattern of viral gene expression during lytic infection of cell cultures is not seen during reactivation. During reactivation, early viral transcripts were detected before immediate-early transcripts. The possibility that a cellular factor upregulates early genes during the initial reactivation stimulus is discussed.

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