title: Induction of digestive tract tumors and leukemias in Donryu rats by administration of 1-amyl-1-nitrosourea in drinking water.
abstract: The effects of administration of 1-amyl-1-nitrosourea (ANU) at doses of 400, 200, 100 and 0 ppm in the drinking water to Donryu rats of both sexes were studied. Tumors developed in 166/205 (81%) rats that received ANU, as compared with 9/34 (27%) control rats. The incidence of digestive tract tumors was highest (76%), followed by hematopoietic tissue (11%) and liver (9%) tumors. In females, mammary tumors were also found. There appeared to be a dose-response relationship among the 3 treated groups as regards the incidence of tumors of the hematopoietic tissues and the average survival time.
mesh_terms: D000818:Animals; D004067:Digestive System Neoplasms / Q000139:chemically induced* / Q000473:pathology; D004305:Dose-Response Relationship, Drug; D005260:Female; D007942:Leukemia, Experimental / Q000139:chemically induced* / Q000473:pathology; D008297:Male; D008325:Mammary Neoplasms, Experimental / Q000139:chemically induced* / Q000473:pathology; D009374:Neoplasms, Experimental / Q000139:chemically induced / Q000473:pathology; D009607:Nitrosourea Compounds / Q000008:administration & dosage* / Q000633:toxicity; D051381:Rats; D014881:Water Supply
chemical_list: D009607:Nitrosourea Compounds; C027279:1-amyl-1-nitrosourea