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Carcinogenicity of 3-methyl-2-naphthylamine and 3,2'-dimethyl-4-aminobiphenyl to the bladder and gastrointestinal tract of the Syrian golden hamster with atypical proliferative enteritis. 1981

G M Williams, and V Chandrasekaran, and S Katayama, and J H Weisburger

3,2'-Dimethyl-4-aminobiphenyl (DMAB) and 3-methyl-2-naphthylamine (MeNA) were each administered to groups of 25 male noninbred Syrian golden hamster weanlings in doses of 100 mg/kg body weight by weekly sc injections for a total of 38 injections over 18--22 months. DMAB produced a high incidence of urinary bladder epithelial neoplasms and intestinal neoplasms. Other neoplasms included squamous papilloma of nonglandular stomach, lymphoma-leukemias, and squamous cell carcinomas of the ear duct and skin. With MeNA, urinary bladder epithelial neoplasms occurred but no intestinal tumors. Also present were soft-tissue sarcomas at the injection site, papilloma of forestomach, and lymphoma-leukemias. Most hamsters in both groups as well as the control group had a chronic form of atypical proliferative enteritis that affected the small or large intestine. The occurrence of intestinal tumors with DMAB could be related to sensitizing effect of increased intestinal mucosal proliferation. Apart from this effect, hamsters displayed a distinct susceptibility to bladder carcinogenesis by these aromatic amines.

UI MeSH Term Description Entries
D008297 Male Males
D008647 Mesocricetus A genus in the order Rodentia and family Cricetidae. One species, Mesocricetus auratus or golden hamster is widely used in biomedical research. Hamsters, Golden,Hamsters, Golden Syrian,Hamsters, Syrian,Mesocricetus auratus,Syrian Golden Hamster,Syrian Hamster,Golden Hamster,Golden Hamster, Syrian,Golden Hamsters,Golden Syrian Hamsters,Hamster, Golden,Hamster, Syrian,Hamster, Syrian Golden,Syrian Hamsters
D009281 Naphthalenes Two-ring crystalline hydrocarbons isolated from coal tar. They are used as intermediates in chemical synthesis, as insect repellents, fungicides, lubricants, preservatives, and, formerly, as topical antiseptics.
D009374 Neoplasms, Experimental Experimentally induced new abnormal growth of TISSUES in animals to provide models for studying human neoplasms. Experimental Neoplasms,Experimental Neoplasm,Neoplasm, Experimental
D001749 Urinary Bladder Neoplasms Tumors or cancer of the URINARY BLADDER. Bladder Cancer,Bladder Neoplasms,Cancer of Bladder,Bladder Tumors,Cancer of the Bladder,Malignant Tumor of Urinary Bladder,Neoplasms, Bladder,Urinary Bladder Cancer,Bladder Cancers,Bladder Neoplasm,Bladder Tumor,Cancer, Bladder,Cancer, Urinary Bladder,Neoplasm, Bladder,Neoplasm, Urinary Bladder,Tumor, Bladder,Tumors, Bladder,Urinary Bladder Neoplasm
D002273 Carcinogens Substances that increase the risk of NEOPLASMS in humans or animals. Both genotoxic chemicals, which affect DNA directly, and nongenotoxic chemicals, which induce neoplasms by other mechanism, are included. Carcinogen,Oncogen,Oncogens,Tumor Initiator,Tumor Initiators,Tumor Promoter,Tumor Promoters,Initiator, Tumor,Initiators, Tumor,Promoter, Tumor,Promoters, Tumor
D002295 Carcinoma, Transitional Cell A malignant neoplasm derived from TRANSITIONAL EPITHELIAL CELLS, occurring chiefly in the URINARY BLADDER; URETERS; or RENAL PELVIS. Carcinomas, Transitional Cell,Cell Carcinoma, Transitional,Cell Carcinomas, Transitional,Transitional Cell Carcinoma,Transitional Cell Carcinomas
D004159 Diphenylamine In humans it may be irritating to mucous membranes. Methemoglobinemia has been produced experimentally. In veterinary use, it is one of active ingredients in topical agents for prevention and treatment of screwworm infestation. An indicator in tests for nitrate poisoning.
D004751 Enteritis Inflammation of any segment of the SMALL INTESTINE. Enteritides
D005770 Gastrointestinal Neoplasms Tumors or cancer of the GASTROINTESTINAL TRACT, from the MOUTH to the ANAL CANAL. Gastrointestinal Cancer,Cancer of Gastrointestinal Tract,Cancer of the Gastrointestinal Tract,Neoplasms, Gastrointestinal,Cancer, Gastrointestinal,Cancers, Gastrointestinal,Gastrointestinal Cancers,Gastrointestinal Neoplasm,Gastrointestinal Tract Cancer,Gastrointestinal Tract Cancers,Neoplasm, Gastrointestinal

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