title: Histopathological evaluation of the inhibition of rat bladder carcinogenesis by 13-cis-retinoic acid.
abstract: An objective system for histopathological and statistical evaluation of rat bladder lesions induced by the carcinogen, N-methyl-N-nitrosourea, is described. This system has been used to measure the inhibitory effects of 13-cis-retinoic acid on the development of bladder cancer in female Wistar/Lewis rats. 13-cis-Retinoic acid caused significant inhibition of development of both preneoplastic and neoplastic lesions in bladder epithelium.
mesh_terms: D000818:Animals; D004848:Epithelium / Q000473:pathology; D005260:Female; D008770:Methylnitrosourea; D009374:Neoplasms, Experimental / Q000139:chemically induced / Q000473:pathology / Q000517:prevention & control; D011230:Precancerous Conditions / Q000139:chemically induced / Q000473:pathology / Q000517:prevention & control*; D051381:Rats; D013223:Statistics as Topic; D014212:Tretinoin / Q000494:pharmacology*; D001749:Urinary Bladder Neoplasms / Q000139:chemically induced / Q000473:pathology / Q000517:prevention & control*; D014801:Vitamin A / Q000031:analogs & derivatives*
chemical_list: D014801:Vitamin A; D014212:Tretinoin; D008770:Methylnitrosourea