title: Potentiation of the antitumor action of 5-fluorouracil with 5-ethyl-2'-deoxyuridine in human colorectal tumor xenografts.
abstract: The tumor growth inhibitory effect of 5-ethyl-2'-deoxyuridine ( EUdR ) in combination with 5-fluorouracil (5-FU) has been studied on four human colorectal xenograft lines. In all lines the EUdR pretreatment potentiated the effect of 5-FU presumably due to the increased incorporation of 5-FU into RNA via elevated intracellular thymidine concentration and decreased rate of 5-FU catabolism.
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000188:drug therapy*; D000818:Animals; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D002277:Carcinoma / Q000188:drug therapy*; D003110:Colonic Neoplasms / Q000188:drug therapy*; D003857:Deoxyuridine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use; D004357:Drug Synergism; D005472:Fluorouracil / Q000008:administration & dosage / Q000378:metabolism / Q000627:therapeutic use*; D006801:Humans; D051379:Mice; D008808:Mice, Inbred CBA; D009368:Neoplasm Transplantation; D012334:RNA, Neoplasm / Q000378:metabolism; D012004:Rectal Neoplasms / Q000188:drug therapy*; D014183:Transplantation, Heterologous
chemical_list: D012334:RNA, Neoplasm; C022811:edoxudin; D005472:Fluorouracil; D003857:Deoxyuridine