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.

telomerase-specific type 5 adenovirus OBP-301
A replication-competent oncolytic, telomerase-specific adenovirus serotype 5 (Ad5), with potential antineoplastic activity. OBP-301 contains the human telomerase reverse transcriptase (hTERT) gene promoter sequence that drives the expression of the E1A and E1B genes, and is linked to an internal ribosomal entry site (IRES). Upon administration, OBP-301 selectively infects and replicates in cancer cells that are expressing telomerase, which causes cell lysis. This adenovirus does not infect or replicate in normal, healthy cells. OBP-301 may also potentially be used as a chemosensitizer. hTERT, which encodes for the catalytic protein subunit of telomerase, is overexpressed in a variety of cancer cell types but not in normal, healthy cells. The insertion of an IRES further improves selectivity towards telomerase-expressing cancer cells. Check for active clinical trials using this agent. (NCI Thesaurus)

US brand name:Telomelysin
Code name:OBP-301