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SYNTHESIS, IN VITRO METABOLISM, MUTAGENICITY, AND DNA-ADDUCTION OF NAPHTHO[1,2-E]PYRENE
Citation:
Desai, D., A. Sharma, M Pimentel, K ElBayoumy, S Nesnow, S. Amin, AND J. Lin. SYNTHESIS, IN VITRO METABOLISM, MUTAGENICITY, AND DNA-ADDUCTION OF NAPHTHO[1,2-E]PYRENE. POLYCYCLIC AROMATIC COMPOUNDS 22(3-4):267-276, (2001).
Description:
SYNTHESIS, IN V1TRO METABOLISM, MUTAGENICITY , AND DNA-ADDUCnON OF NAPHTHO[l ,2-e ]PYRENE
Literature data, although limited, underscore the contribution of C24HI4 polycyclic aromatic hydrocarbons to the biological activity of the extracts of complex environmental samples. However, little attention has been given to naphthopyrene (NP) isomers due to lack of synthetic standards and, therefore, lack of studies aimed at unequivocal identification of C24HI4 isomers in environmental samples. We hypothesize that naphtho[l ,2-e ]pyrene (N[ 1 ,2-e ]P), having a fjord region and a bay region might be a potent mutagen. To test our hypothesis, we synthesized N[ 1 ,2-e ]P by Suzuki Reaction and examined its in vitro metabolism with the S9 fraction from Phenobarbital/ p-naphthoflavone- induced rat liver homogenates. We have tentatively identified its K- region diol as the major metabolite and a fjord region dihydrodiol as minor metabolite. Contrary to our hypothesis, N[ 1 ,2-e ]P was not mutagenic in s. typhimurium strain TA 100 and did not induce morphological cell transformation in mammalian cells. Its metabolite, I I, I 2-dihydroxy-11 , 12-dihydro-N[ 1 ,2-e ]P was a weak mutagen. The reaction of calf thymus DNA with N[1,2-e]P-11,12-diol-13,14-epoxide showed that it reacts predominately with the exocyclic amino group of adenine.
Keywords Naphtho[l ,2-e ]pyrene; synthesis; metabolism; mutagenicity; cell transformation; DNA adducts.