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Kaposi’s sarcoma-associated herpesvirus (KSHV) is a pathogen causing cancer in the immune-deficient population. The reactivation of KSHV from latency is important for it to be carcinogenic. Our finding that SIRT6 has inhibitory effects on KSHV reactivation by interacting with the viral genome and suppressing viral gene expression is important because it might lead to a strategy of interfering with KSHV reactivation. Overexpression of SIRT6 repressed the activities of several KSHV promoters, leading to reduced gene expression and DNA replication by KSHV in a KSHV bacterial artificial chromosome-containing cell line. Depletion of SIRT6 favored reactivation of KSHV from SLK-iBACV-gfpK52 cells. More importantly, we reveal that SIRT6 interacts with KSHV DNA. Whether the interaction of SIRT6 with KSHV DNA occurs at a global level will be further studied in the future.

Sirtuin 6 Attenuates Kaposi's Sarcoma-Associated Herpesvirus Reactivation by Suppressing Ori-Lyt Activity and Expression of RTA