title: [Effects of OK-432 on UFT activation].
abstract: An experiment to gauge the effect of OK-432 on UFT activation under a combined administration of UFT and OK-432 at a therapeutic dose has been pursued clinically by determining the blood and intratumoral 5-FU concentrations after administration of UFT. UFT was administered orally to a group of AH-130-bearing rats at a dose of 12 mg/kg or 8 mg/kg. In another group that was given combined treatment with OK-432, the OK-432 was administered subcutaneously at a dose of 0.1 KE/kg together with UFT. The intratumoral 5-FU concentration at 4 hours after UFT 12 mg/kg administration showed higher values in th single UFT treated group than in the combined treated group, but at 8 hours no significant difference was found between these two groups as the concentrations were 0.133 +/- 0.027 microgram/g and 0.128 +/- 0.021 microgram/g, respectively. Further, no significant differences were noticed in the blood and intratumoral 5-FU concentrations between both groups after administration of UFT at a dose of 8 mg/kg. Clinically, the blood FT-207 and 5-FU concentrations after UFT administration showed no significant difference between the single UFT treated group and the combined OK-432 treated group, nor was there a significant difference in the intratumoral concentration. In summary, it is considered that OK-432 has little effect on UFT activation when UFT and OK-432 are administered in combination.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000008:administration & dosage / Q000493:pharmacokinetics*; D001688:Biological Products / Q000494:pharmacology*; D005472:Fluorouracil / Q000097:blood; D006801:Humans; D008114:Liver Neoplasms, Experimental / Q000378:metabolism / Q000628:therapy; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000378:metabolism* / Q000628:therapy; D010844:Picibanil / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D005641:Tegafur / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics; D014498:Uracil / Q000008:administration & dosage / Q000493:pharmacokinetics
chemical_list: D001688:Biological Products; D005641:Tegafur; D010844:Picibanil; D014498:Uracil; D005472:Fluorouracil