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Although most studies concerning the effect of vitamin A and β-carotene on chemical carcinogenesis are focused on tumour promotion and progression, these compounds may affect initiation as well. In this study the influence of vitamin A and β-carotene on unscheduled DNA synthesis (UDS) was investigated in hamster tracheal epithelium in organ culture exposed to benzo[a]pyrene (B[a]P). DNA-repair activities...
Several experimental models have been developed to study respiratory tract carcinogenesis. The most widely applied in vivo model uses Syrian golden hamsters which receive intratracheal instillations of a suspension of benzo[a]pyrene (B[a]P) particles attached to ferric-oxide (Fe 2 O 3 ) particles in saline; it was first described by Saffiotti et al. [1]. This model has several benefits...
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