Proposal to Eliminate Urethane-Treated Positive Control Dose Groups in 26-Week Tg.rasH2 Carcinogenicity Studies
| Autor: | Jay Albretsen, Rossalin Yonpiam, Aaron M. Sargeant, Christopher Papagiannis, Kimberly Bonnette, Daniel G. Rudmann, Madhav G. Paranjpe, Mark A. Morse |
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| Rok vydání: | 2021 |
| Předmět: |
Animal Experimentation
Male Lung Neoplasms Carcinogenicity Tests Observation period Physiology Positive control Spleen Mice Transgenic 010501 environmental sciences Toxicology 030226 pharmacology & pharmacy 01 natural sciences Urethane 03 medical and health sciences Mice 0302 clinical medicine medicine Animals Carcinogen 0105 earth and related environmental sciences Lung business.industry Splenic Neoplasms medicine.anatomical_structure Carcinogens Female business |
| Zdroj: | International journal of toxicology. 40(3) |
| ISSN: | 1092-874X |
| Popis: | Short-term (26 weeks) Tg.rasH2 mouse carcinogenicity studies have been conducted as an alternative model to the conventional 2-year mouse carcinogenicity studies, using urethane as a positive control material. In these studies, urethane was used at a dose of 1,000 mg/kg/dose, administered intraperitoneally on days 1, 3, and 5. Urethane consistently produces lung adenomas and carcinomas and hemangiosarcomas of the spleen, proving validity of the assay. We conducted 3 pilot studies at 3 different sites of Charles River Laboratories using a lower dose of urethane (500 mg/kg/dose), administered on days 1, 3, and 5, followed by a 12-week observation period. Our results demonstrate that a lower dose can be used successfully with fewer number of animals per sex to prove the validity of the assay. However, based on our cumulative experience with this model, we propose to eliminate positive control dose groups in future Tg.rasH2 carcinogenicity studies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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