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[UFT therapy of experimental gastric cancer in beagles induced by ENNG].

Therapeutic effects and dynamics of UFT were studied using beagles with ENNG-induced gastric cancers. Nine canine subjects confirmed to have gastric cancers by punch biopsy under gastrofiberscopy were divided into 3 group given 5 mg/kg/day of UFT for 101 days, 7.5 mg/kg/day for 67 days and 12 mg/kg/day for 45 days, respectively. Although the extent of macroscopic change revealed by gastrofiberscopy was minor, one of the dogs in the third group did show a Grade II b effect according to the criteria of Histopathological Effects on Cancer Tissues by Chemotherapy proposed by Oboshi and Shimozato. Animals were sacrificed by bleeding 4 hours after the last administration of anticancer agent and concentration of 5-FU and tegafur in the serum and each organ were determined. It was recognized that the concentration of anticancer agent in gastric cancer tissue was higher than that in neighboring normal gastric tissue.