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Epigenetic reprogramming of Kaposi’s sarcoma-associated herpesvirus during hypoxic reactivation

ABSTRACT: Chromatin Immuno-precipitaion sequencing was performed using H3-Ac, H3K4Me3, H3K9Me3, H3K27Me3, LANA, RTA and DNA Polymerase 1 alpha antibodies to investigate its enrichment on Kaposi's sarcoma associated herpesvirus (KSHV) genome in BC3 cells under normoxic or hypoxic conditions

ORGANISM(S): Homo sapiens

PROVIDER: GSE202670 | GEO | 2022/08/15

REPOSITORIES: GEO

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Genome-wide mapping of RTA binding sites in KSHV+ PEL cells during KSHV reactivation.

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Project description:Epstein-Barr virus (EBV) Rta is a latent-lytic molecular switch evolutionarily conserved in all gamma-herpesviruses. In previous studies, doxycycline-inducible Rta was shown to potently produce an irreversible G1 arrest followed by cellular senescence in 293 cells. Here, we demonstrate that in this system the inducible Rta not only reactivates resident genome of EBV but also that of Kaposi’s sarcoma-associated herpesvirus (KSHV), to similar efficiency. However, Rta-induced senescence program was terminated by the robust viral lytic cycle replication that eventually caused cell death. Furthermore, prior to the abrupt expression of immediate-early protein (EBV BZLF1 or KSHV RTA), Rta simultaneously down-regulates cell cycle activators (c-Myc, CDK6, CCND2) and up-regulates senescence-related genes (p21, 14-3-3s). Since Rta is a viral immediate-early transcriptional activator, it is envisioned that during the initial stage of viral reactivation, Rta may engage to modulate the host transcriptome, to halt cell cycle progression, and to maintain an ideal environment for manufacturing infectious virions. Refer to individual Series. This SuperSeries is composed of the following subset Series: GSE24585: Expression profiling of host genes modulated by Epstein-Barr virus (EBV) Rta in HEK293 cells GSE24586: Expression profiling of host genes modulated by Epstein-Barr virus Rta in nasopharyngeal carcinoma cells

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