To this end, we evaluated the mRNA expression levels of selected latent and lytic gammaherpesvirus genes, DNA methyltransferase 1 (DNMT1), the endogenous retrovirus ERV3-1, IFN-α, IFN-β, IFN-γ, IFN-λ2, and selected interferon-induced genes after treatment of KSHV- and EBV-infected tumor lines with 1 μM Abe for 24 h. The gene discussed is IFNB1; the disease is neoplasm.