HDAC9 and cancer: The target genes, whose expression was downregulated in cancer, belong to gene sets such as BREAST CANCER NORMAL LIKE UP, NASOPHARYNGEAL CARCINOMA, DIFFERENTIATING T LYMPHOCYTE, BOUND BY FOXP3, as well as epigenetic related BRAIN HCP WITH H3K4ME3 AND H3K27ME3, ES ICP WITH H3K4ME3, HDAC TARGETS SILENCED BY METHYLATION DN, and many more (Table S4, top).