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[Thymidylate synthase inhibition in malignant tumors after oral administration of UFT]. 1986

M Yamamura, and T Seiro, and M Yamamoto, and T Shirasaka, and S Miyauchi, and S Fujii

Surgical resection of solid tumors was undertaken five to six hours after the oral administration of UFT (300-500 mg/body) in five patients, who were (then) assayed for 5-fluorodeoxyuridylate (FdUMP), total dTMP synthase (TS) and non-FdUMP-bound, free enzyme. Three patients had gastric cancer, and two had mammary cancer. Control solid tumors were obtained without, the drug in eight patients. Six patients had gastric cancer. Eight had mammary cancer. Total TS averaged 2.04 p mol/g in the malignant tissues. TS inhibition averaged 40.1% to 57.1% in gastric cancer and 17.1% to 52.7% in mammary cancer. These data suggest that TS inhibition after oral administration of 5FU derivatives may be usefully studied for biochemical parameters of mechanisms of drug resistance.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D001943 Breast Neoplasms Tumors or cancer of the human BREAST. Breast Cancer,Breast Tumors,Cancer of Breast,Breast Carcinoma,Cancer of the Breast,Human Mammary Carcinoma,Malignant Neoplasm of Breast,Malignant Tumor of Breast,Mammary Cancer,Mammary Carcinoma, Human,Mammary Neoplasm, Human,Mammary Neoplasms, Human,Neoplasms, Breast,Tumors, Breast,Breast Carcinomas,Breast Malignant Neoplasm,Breast Malignant Neoplasms,Breast Malignant Tumor,Breast Malignant Tumors,Breast Neoplasm,Breast Tumor,Cancer, Breast,Cancer, Mammary,Cancers, Mammary,Carcinoma, Breast,Carcinoma, Human Mammary,Carcinomas, Breast,Carcinomas, Human Mammary,Human Mammary Carcinomas,Human Mammary Neoplasm,Human Mammary Neoplasms,Mammary Cancers,Mammary Carcinomas, Human,Neoplasm, Breast,Neoplasm, Human Mammary,Neoplasms, Human Mammary,Tumor, Breast
D004351 Drug Resistance Diminished or failed response of an organism, disease or tissue to the intended effectiveness of a chemical or drug. It should be differentiated from DRUG TOLERANCE which is the progressive diminution of the susceptibility of a human or animal to the effects of a drug, as a result of continued administration. Resistance, Drug
D005260 Female Females
D005641 Tegafur Congener of FLUOROURACIL with comparable antineoplastic action. It has been suggested especially for the treatment of breast neoplasms. 1-(2-Tetrahydrofuryl)-5-fluorouracil,1-(Tetrahydro-2-furanyl)-5-fluorouracil,5-Fluoro-1-(tetrahydro-2-furanyl)-2,4-pyrimidinedione,FT-207,FT207,Florafur,Fluorofur,Ftorafur,Futraful,N1-(2'-Tetrahydrofuryl)-5-fluorouracil,Sunfural S,Uftoral,Utefos,FT 207
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000284 Administration, Oral The giving of drugs, chemicals, or other substances by mouth. Drug Administration, Oral,Administration, Oral Drug,Oral Administration,Oral Drug Administration,Administrations, Oral,Administrations, Oral Drug,Drug Administrations, Oral,Oral Administrations,Oral Drug Administrations
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly

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