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Viruses 2013, 5(5), 1325-1345; doi:10.3390/v5051325
Article

Epigenetic Control of Cytomegalovirus Latency and Reactivation

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Received: 26 March 2013 / Revised: 19 April 2013 / Accepted: 7 May 2013 / Published: 23 May 2013
(This article belongs to the Special Issue Chromatin Control of Viral Infection)
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Abstract

Cytomegalovirus (CMV) gene expression is repressed in latency due to heterochromatinization of viral genomes. In murine CMV (MCMV) latently infected mice, viral genomes are bound to histones with heterochromatic modifications, to enzymes that mediate these modifications, and to adaptor proteins that may recruit co-repressor complexes. Kinetic analyses of repressor binding show that these repressors are recruited at the earliest time of infection, suggesting that latency may be the default state. Kidney transplantation leads to epigenetic reprogramming of latent viral chromatin and reactivation of immediate early gene expression. Inflammatory signaling pathways, which activate transcription factors that regulate the major immediate early promoter (MIEP), likely mediate the switch in viral chromatin.
Keywords: cytomegalovirus; latency; reactivation; epigenetics; chromatin; intrinsic immunity; transplantation cytomegalovirus; latency; reactivation; epigenetics; chromatin; intrinsic immunity; transplantation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Liu, X.-F.; Wang, X.; Yan, S.; Zhang, Z.; Abecassis, M.; Hummel, M. Epigenetic Control of Cytomegalovirus Latency and Reactivation. Viruses 2013, 5, 1325-1345.

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