has function has role immunizes against disease immunizes recipient hepatocellular carcinoma Homo sapiens therapeutic vaccine function vaccine in clinical trial role hepatocellular carcinoma vaccine MVA-FCU1 TG4023 vaccine Oliver He Jie Zheng Yuanyi (Penny) Pan https://github.com/vaccineontology/VO/issues/563 5312 A cancer vaccine comprised of a recombinant modified vaccinia Ankara (MVA) viral vector encoding the suicide gene FCU1 with potential antineoplastic activity. FCU1 is a bifunctional yeast cytosine deaminase (CD) / uracil phosphoribosyltransferase (UPRT) fusion gene. Upon intratumoral administration, MVA-FCU1TG4023 enters tumor cells where FCU1 is expressed. Subsequently, the noncytotoxic prodrug 5-fluorocytosine (5-FC) is administered systemically and is deaminated by CD in FCU1- transduced tumor cells into 5-fluorouracil (5-FU), which is then directly metabolized to 5-fluoro-uridine monophosphate (5-FUMP) by UPRT; 5-FUMP may then be further transformed to 5-fluoro-deoxyuridine monophosphate (5-FdUMP), an irreversible inhibitor of thymidylate synthase and, so, DNA synthesis through deprivation of deoxythymidine triphosphate (dTTP). 5-FU and its active metabolites may then selectively kill tumor cells, avoiding toxicity in nonmalignant cells. The MVA viral vector, derived from the replication-competent strain Ankara, is a highly attenuated, replication-defective vaccinia strain incapable of virion assembly cancer vaccine Justin Song VIOLIN: https://violinet.org/vaxquery/vaccine_detail.php?c_vaccine_id=5312 therapeutic cancer vaccine