title: [Antitumor activity of T-506, a novel synthetic FUDR derivative, on murine colon cancer and its hepatic metastasis].
abstract: T-506 is a novel synthetic FUDR derivative which releases FUDR slowly in vivo. We studied antitumor activity of T-506 by i.v. injection against mouse colon cancer, colon 26. When T-506 was administrated to mice daily, from day 1 through day 10, or every 3 days, on days 1, 4, 7, and 11, after s.c. inoculation of the tumor, the survival period was expanded significantly. The subcutaneous tumor growth was also inhibited according to the dose levels. Then, we compared the therapeutic effects on the experimental hepatic metastasis of colon 26 between T-506, 5'-DFUR and UFT at each maximal tolerable dose; that is, T-506 (0.074 m mole/kg/day; i.v. on days 1, 4, 7, and 10), 5'-DFUR (1.0 m mole/kg/day; P. O. from day 1 to 7), UFT (0.1 m mole/kg/day; P. O. from day 1 to 7). T-506 and 5'-DFUR suppressed completely the metastases of 5 of 6 (83.3%) mice and 6 of 7 (85.7%), respectively. UFT did not show a significant inhibitory effect. However, since the loss of body weight was more marked in T-506 than in the other two drugs, the side effect was thought to be a serious problem. These data suggested that if the side effect could be overcome, T-506 would be useful clinically for the treatment of gastrointestinal cancers or hepatic metastases.
authors.affiliation: Second Dept. of Surgery, Toyama Medical and Pharmaceutical University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kuroki
authors.forename: I
authors.initials: I
authors.lastname: Yamashita
authors.forename: M
authors.initials: M
authors.lastname: Okamoto
authors.forename: H
authors.initials: H
authors.lastname: Ochiai
authors.forename: M
authors.initials: M
authors.lastname: Kurokawa
authors.forename: K
authors.initials: K
authors.lastname: Tazawa
authors.forename: M
authors.initials: M
authors.lastname: Fujimaki
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000627:therapeutic use*; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D003110:Colonic Neoplasms / Q000188:drug therapy* / Q000473:pathology; D005467:Floxuridine / Q000627:therapeutic use; D005468:Fluorodeoxyuridylate / Q000031:analogs & derivatives* / Q000627:therapeutic use; D008113:Liver Neoplasms / Q000188:drug therapy / Q000556:secondary*; D051379:Mice; D008807:Mice, Inbred BALB C; D005641:Tegafur / Q000627:therapeutic use; D014498:Uracil / Q000627:therapeutic use
chemical_list: D000970:Antineoplastic Agents; D005467:Floxuridine; C069754:T 506; D005468:Fluorodeoxyuridylate; D005641:Tegafur; D014498:Uracil; C025034:doxifluridine