title: Epigenetic control of HIV-1 post integration latency: implications for therapy.
abstract: With the development of effective combined anti-retroviral therapy (cART), there is significant reduction in deaths associated with human immunodeficiency virus type 1 (HIV-1) infection. However, the complete cure of HIV-1 infection is difficult to achieve without the elimination of latent reservoirs which exist in the infected individuals even under cART regimen. These latent reservoirs established during early infection have long life span, include resting CD4(+) T cells, macrophages, central nervous system (CNS) resident macrophage/microglia, and gut-associated lymphoid tissue/macrophages, and can actively produce virus upon interruption of the cART. Several epigenetic and non-epigenetic mechanisms have been implicated in the regulation of viral latency. Epigenetic mechanisms such as histone post translational modifications (e.g., acetylation and methylation) and DNA methylation of the proviral DNA and microRNAs are involved in the establishment of HIV-1 latency. The better understanding of epigenetic mechanisms modulating HIV-1 latency could give clues for the complete eradication of these latent reservoirs. Several latency-reversing agents (LRA) have been found effective in reactivating HIV-1 reservoirs in vitro, ex vivo, and in vivo. Some of these agents target epigenetic modifications to elicit viral expression in order to kill latently infected cells through viral cytopathic effect or host immune response. These therapeutic approaches aimed at achieving a sterilizing cure (elimination of HIV-1 from the human body). In the present review, we will discuss our current understanding of HIV-1 epigenomics and how this information can be moved from the laboratory bench to the patient's bedside.
authors.affiliation: Department of Virology, Pathogens & Inflammation Laboratory, University of Franche-Comté and COMUE Bourgogne Franche-Comté University, UPRES EA4266, SFR FED 4234, CHRU Besançon, Hôpital Saint-Jacques, 2 place Saint-Jacques, F-25030 Besançon cedex, France.
authors.forename: Amit
authors.initials: A
authors.lastname: Kumar
authors.affiliation: Service of Molecular Virology, Institute of Molecular Biology and Medicine, Université Libre de Bruxelles (ULB), 12 Rue des Profs Jeener et Brachet, 6041 Gosselies, Belgium.
authors.forename: Gilles
authors.initials: G
authors.lastname: Darcis
authors.affiliation: Service of Molecular Virology, Institute of Molecular Biology and Medicine, Université Libre de Bruxelles (ULB), 12 Rue des Profs Jeener et Brachet, 6041 Gosselies, Belgium.
authors.forename: Carine
authors.initials: C
authors.lastname: Van Lint
authors.affiliation: Department of Virology, Pathogens & Inflammation Laboratory, University of Franche-Comté and COMUE Bourgogne Franche-Comté University, UPRES EA4266, SFR FED 4234, CHRU Besançon, Hôpital Saint-Jacques, 2 place Saint-Jacques, F-25030 Besançon cedex, France.
authors.forename: Georges
authors.initials: G
authors.lastname: Herbein
keywords: CD4+ T cells; Epigenetics; HIV-1; Histone modifications; Latency; MicroRNAs; Microglia; Monocyte/macrophage