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J Gen Virol. 2008 Apr;89(Pt 4):878-83. doi: 10.1099/vir.0.83533-0.

Essential role of PKCdelta in histone deacetylase inhibitor-induced Epstein-Barr virus reactivation in nasopharyngeal carcinoma cells.

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  • 1Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei 10051, Taiwan, ROC.


Histone deactylase inhibitors (HDACi) are common chemotherapeutic agents that stimulate Epstein-Barr virus (EBV) reactivation; the detailed mechanism remains obscure. In this study, it is demonstrated that PKCdelta is required for induction of the EBV lytic cycle by HDACi. Inhibition of PKCdelta abrogates HDACi-mediated transcriptional activation of the Zta promoter and downstream lytic gene expression. Nuclear translocation of PKCdelta is observed following HDACi stimulation and its overexpression leads to progression of the EBV lytic cycle. Our study suggests that PKCdelta is a crucial mediator of EBV reactivation and provides a novel insight to study the regulation of the EBV lytic cycle.

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