The Effect of Different Doses of Cigarette Smoke in a Mouse Lung Tumor Model

International Journal of Clinical and Experimental Pathology

Lúcia Campanario Braga¹  José Antônio Cordeiro¹  Patrícia M. Cury¹  Ludmilla Nadir Santiago¹  Juliana de Camargo Fenley¹ 

关键词: experimental carcinogenesis;    lung cancer;    Balb/c mice;    tobacco smoking;    urethane;   

DOI  :  

学科分类：生理学与病理学

来源: e-Century Publishing Corporation

【 摘 要 】

Few studies have used Balb/c mice as an animal model for lung carcinogenesis. In this study, we investigated the effect of different doses of cigarette smoking in the urethane-induced Balb/c mouse lung cancer model. After injection of 3mg/kg urethane intraperitoneally, the mice were then exposed to tobacco smoke once or twice a day, five times a week, in a closed chamber. The animals were randomly divided into four groups. The control group (G0) received urethane only. The experimental groups (G1, G2 and G3) received urethane and exposure to the smoke of 3 cigarettes for 10 minutes once a day, 3 cigarettes for 10 minutes twice a day, and 6 cigarettes for 10 minutes twice a day, respectively. The mice were sacrificed after 16 weeks of exposure, and the number of nodules and hyperplasia in the lungs was counted. The results showed no statistically significant difference in the mean number of nodules and hyperplasia among the different groups, suggesting that the Balb/c mice are not suitable to study the pathogenesis of tobacco smoking-induced tumor progression in the lungs.

【 授权许可】

Unknown