Abstract
Benz[ j]aceanthrylene (B[ j]A), a cyclopenta-fused derivative of benz[ a]anthracene, has been reported to be an active bacterial cell and mammalian cell gene mutagen, a morphological transforming agent in C3H10T 1 2 CL8 mouse embryo fibroblasts and a mouse lung tumorigen in strain A J mice. B[ j]A was evaluated as a skin tumor initiator in female SENCAR mice and was found to induce papilloma formation in the range of 40–400 μg/mouse. B[ j]A was found to be extremely active, inducing 8.7 papillomas/mouse after an initiating dose of 40 μg/mouse. At this dose, 100% of the mice bore tumors. Comparison with four other cyclopenta-fused polycyclic aromatic hydrocarbons suggests that B[ j]A is extremely potent.
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