title: Benz[j]aceanthrylene: a novel polycyclic aromatic hydrocarbon with bacterial mutagenic activity.
abstract: Initial studies on the mutagenicity and metabolism of a novel cyclopenta-PAH, benz[j]aceanthrylene, are reported in the Salmonella bacterial system. The spectrum of activity of benz[j]aceanthrylene over the 5 Ames tester strains is similar to that of benzo[a]pyrene, and the dose-response curves for strain TA98 are comparable. Like other biologically active PAH, benz[j]aceanthrylene is a frame-shift mutagen requiring metabolic activation. An interesting feature of the S9 dependence of activity is the low concentration (congruent to 10-fold smaller than for benzo[a]pyrene) at which optimal activity is observed. The 1,2-dihydro-1,2-diol (product of metabolism of the cyclopenta-ring) appears to be the predominant metabolite, and implicates the 1,2-oxide as the ultimate mutagenic species.
mesh_terms: D008748:Methylcholanthrene / Q000031:analogs & derivatives* / Q000378:metabolism / Q000494:pharmacology; D008862:Microsomes, Liver / Q000378:metabolism; D009152:Mutagenicity Tests; D009153:Mutagens; D012486:Salmonella typhimurium / Q000187:drug effects*
chemical_list: D009153:Mutagens; D008748:Methylcholanthrene; C037411:benz(j)aceanthrylene