CCL4 and hepatocellular carcinoma: Interestingly, pharmacological inhibition of histone deacetylase 8 (HDAC8), a histone H3 lysine 27 (H3K27)-specific isozyme overexpressed in a variety of human cancers, increased global and enhancer acetylation of H3K27 to reactivate the production of CCL4 by HCC cells, thus dampening HCC tumorigenicity in a T cell-dependent manner.