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Wattenberg, L.W. et al.

Neoplastic effects of oral administration of (+/-)-trans-7,8-dihydroxy-7,8-dihydrobenzo[a]pyrene and their inhibition by butylated hydroxyanisole.

The neoplastic effects of administration of benzo[a]pyrene (BP) and (+/-)-trans-7,8-dihydroxy-7,8-dihydrobenzo[a]pyrene (BP 7,8-dihydrodiol) by oral intubation to noninbred female Ha:ICR mice have been determined. Under the experimental conditions, BP induced papillomas of the forestomach. BP 7,8-dihydrodiol also induced papillomas of the forestomach and was more potent than BP. In addition, administration of BP 7,8-dihydrodiol caused a large number of pulmonary adenomas and lymphomas. Butylated hydroxyanisole (BHA) added to the diet at a concentration of 5 mg/g inhibited BP-induced neoplasia of the forestomach. BHA also inhibited neoplasia of the forestomach, lungs, and lymphoid tissues that was caused by administration of BP 7,8-dihydrodiol. These data suggest that the inhibitory effect of BHA on BP carcinogenesis may entail events that occur subsequent to the formation of BP 7,8-dihydrodiol.[1]

References

Neoplastic effects of oral administration of (+/-)-trans-7,8-dihydroxy-7,8-dihydrobenzo[a]pyrene and their inhibition by butylated hydroxyanisole. Wattenberg, L.W., Jerina, D.M., Lam, L.K., Yagi, H. J. Natl. Cancer Inst. (1979) [Pubmed]

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