Carcinogenicity of butyl 2,3-epoxypropyl ether in rats and mice by whole body inhalation for two years
| Autor: | Kenji Takanobu, Yumi Umeda, Michiharu Matsumoto, Jun Kanno, Hideki Senoh, Tatsuya Kasai, Arata Saito |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Male
Nasal cavity Time Factors Nose Neoplasms Physiology Mice Inbred Strains 010501 environmental sciences Toxicology 030226 pharmacology & pharmacy 01 natural sciences 03 medical and health sciences 0302 clinical medicine medicine Animals Respiratory system 0105 earth and related environmental sciences Inhalation exposure Leukemia Dose-Response Relationship Drug Inhalation business.industry Transitional epithelium Hyperplasia medicine.disease Rats Inbred F344 medicine.anatomical_structure Carcinogens Carcinoma Squamous Cell Respiratory epithelium Female business Olfactory epithelium Ethers |
| Zdroj: | The Journal of Toxicological Sciences. 45:1-14 |
| ISSN: | 1880-3989 0388-1350 |
| DOI: | 10.2131/jts.45.1 |
| Popis: | Butyl 2,3-epoxypropyl ether (CAS No. 2426-08-6, synonym: n-butylglycidyl ether, BGE) was exposed by whole body inhalation to F344 rats and BDF1 mice of both sexes (50 animals per group) 6 hours per day, 5 days per week for 104 weeks at targeted concentrations of 0, 10, 30 or 90 ppm (v/v) for rats and 0, 5, 15 or 45 ppm for mice. In rats, 90 ppm of BGE increased the incidences of nasal squamous cell carcinomas in both sexes. Nasal adenomas and splenic mononuclear cell leukemia were increased in male rats exposed to 30 ppm. Splenic mononuclear cell leukemia was increased in female rats by trend test. Non-neoplastic nasal lesions, such as squamous cell hyperplasia with atypia, squamous cell metaplasia and the inflammation of the respiratory region and atrophy of the olfactory epithelium were increased in both sexes in a dose-dependent manner. In mice, the incidences of histiocytic sarcomas of the uterus in female mice were increased in a dose-dependent manner and the incidences of nasal hemangiomas in both sexes were increased in a dose-dependent manner. Nasal squamous cell carcinoma, a rare tumor, was observed, although not statistically significant, in both sexes. Non-neoplastic lesions such as nodular hyperplasia of the transitional epithelium and cuboidal changes of the respiratory epithelium in the nasal cavity, were increased both in males and females in a dose-dependent manner. The present study demonstrated clear evidence of carcinogenicity of BGE in both rats and mice by the 2-year whole body inhalation exposure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|