NCI Drug Dictionary

The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

HDAC inhibitor AR-42
An orally available phenylbutyrate-derived histone deacetylase (HDAC) inhibitor, with potential antineoplastic activity. Upon oral administration, AR-42 inhibits the catalytic activity of HDAC, which results in an accumulation of highly acetylated chromatin histones, the induction of chromatin remodeling and an altered pattern of gene expression. This leads to the inhibition of tumor oncogene transcription, and the selective transcription of tumor suppressor genes, which inhibits tumor cell division and induces tumor cell apoptosis. HDAC, an enzyme upregulated in many tumor types, deacetylates chromatin histone proteins. Check for active clinical trials using this agent. (NCI Thesaurus)

Code name:AR-42
Chemical structure:(S)-N-hydroxy-4-(3-methyl-2-phenylbutanamido)benzamide