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.

Pol I inhibitor CX5461
An orally bioavailable inhibitor of RNA polymerase I (Pol I), with potential antineoplastic activity. Upon oral administration, CX-5461 selectively binds to and inhibits Pol I, prevents Pol I-mediated ribosomal RNA (rRNA) synthesis, induces apoptosis, and inhibits tumor cell growth. Pol I, the multiprotein complex that synthesizes rRNA, is upregulated in cancer cells and plays a key role in cell proliferation and survival. Hyperactivated rRNA transcription is associated with uncontrolled cancer cell proliferation. Check for active clinical trials using this agent. (NCI Thesaurus)

Synonym:RNA Pol I inhibitor CX5461
Code name:CX5461
Chemical structure:
  • 2-(4-methyl-1,4-diazepan-1-yl)-N-((5-methylpyrazin-2-yl)methyl)-5-oxo-5H-benzo[4,5]thiazolo[3,2-a][1,8]naphthyridine-6-carboxamide
  • 2-(4-methyl-1,4-diazepan-1-yl)-N-[(5-methylpyrazin-2-yl)methyl]-5-oxo-[1,3]benzothiazolo[3,2-a][1,8]naphthyridine-6-carboxamide
  • 5H-benzothiazolo[3,2-a][1,8]naphthyridine-6-carboxamide, 2-(hexahydro-4-methyl-1H-1,4-diazepin-1-yl)-N-[(5-methyl-2-pyrazinyl)methyl]-5-oxo-