Histone deacetylase (HDAC) inhibitors block the removal of acetyl groups from histone proteins. Since acetylation of histones puts chromatin in a more favorable condition for transcription, HDAC inhibitors maintain this favorable state. HDAC inhibitors have been approved for use in cutaneous T-cell lymphoma. They act by sustaining transcription of tumor suppressor genes, which leads to cell cycle arrest and apoptosis. Continue reading →