title: A colon tumor model for anticancer agent evaluation.
abstract: Colon tumors of mice were induced with 1, 2-dimethylhydrazine, N-nitroso-N-methylurethane, methylnitrosourea, and 4-methyl-N'-nitro-N-nitrosoguanidine. Of 82 transplantation attempts, four were successful, and the four tumors have been maintained as distinct tumor lines by subcutaneous transplantation. The tumors graded from II, adenocarcinoma, to IV, undifferentiated carcinoma. Volume-doubling times varied over a three-fold range, and metastatic potential ranged from 5 to about 100%. The tumors responded to treatment with some of the same agents found to be active in man. These included cyclophosphamide, 5-fluorouracil, and certain nitrosoureas. Preliminary evidence suggests that these tumor lines may be useful as experimental models.
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000627:therapeutic use*; D003110:Colonic Neoplasms / Q000139:chemically induced / Q000188:drug therapy*; D004127:Dimethylhydrazines; D004195:Disease Models, Animal; D008769:Methylnitronitrosoguanidine; D008770:Methylnitrosourea; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D009368:Neoplasm Transplantation; D009374:Neoplasms, Experimental; D009605:Nitrosomethylurethane; D014184:Transplantation, Homologous
chemical_list: D000970:Antineoplastic Agents; D004127:Dimethylhydrazines; D008769:Methylnitronitrosoguanidine; D009605:Nitrosomethylurethane; D008770:Methylnitrosourea