title: Induction of intestinal metaplasia and carcinoma in the glandular stomach of rats by N-alkyl-N'-nitro-N-nitrosoguanidines.
abstract: Induction of intestinal metaplasia and carcinoma of the stomach in Wistar rats by four homologs of N-alkyl-N'-nitro-N-nitrosoguanidine (N-alkyl-NNG) was investigated. N-Propyl-, N-butyl, N-isobutyl, and N-pentyl-NNG's were administered to rats as 0.34mM solutions in the drinking water for 12 months and the rats were killed about 6 months later. Intestinal metaplasia was found in the glandular stomach of 100%, 50%, 44%, and 17% of the rats treated with N-propyl-, N-butyl-, N-isobutyl-, and N-pentyl-NNG's, respectively. Adenocarcinoma of the glandular stomach was found in 29% of the rats treated with N-propyl-NNG, but not in those treated with other N-alkyl-NNG's. In the control group, 11% of the rats had intestinal metaplasia but none had tumors.
mesh_terms: D000230:Adenocarcinoma / Q000139:chemically induced* / Q000209:etiology; D000818:Animals; D007413:Intestinal Mucosa / Q000473:pathology*; D008297:Male; D008679:Metaplasia / Q000473:pathology*; D009374:Neoplasms, Experimental / Q000139:chemically induced*; D009604:Nitrosoguanidines; D051381:Rats; D013274:Stomach Neoplasms / Q000139:chemically induced* / Q000209:etiology; D013329:Structure-Activity Relationship
chemical_list: D009604:Nitrosoguanidines