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.
- adenovirus encoding E.coli PNP
A replication-incompetent adenovirus encoding E. coli purine nucleoside phosphorylase (Ad/PNP) used as a prodrug activating agent. Administered intratumorally, Ad/PNP expresses the enzyme PNP, which may catalyze systematically administrated fludarabine phosphate prodrug into its active form 2-fluoroadenine (F-Ade). F-Ade inhibits DNA polymerase alpha, ribonucleotide reductase and DNA primase, thereby interrupting DNA synthesis and inhibiting tumor cell growth. Localized prodrug activation provides targeted chemotherapy, thereby potentially reducing systemic side effects. Check for active clinical trials using this agent.
Synonym: adenovirus encoding purine nucleoside phosphorylase Code name: Ad/PNP