DNA Binding by 1-Nitropyrene and Dinitropyrenes in Vitro and in Vivo: Effects of Nitroreductase Induction

Research Report 31, November 1989

This report describes a study by Dr. Beland to investigate the extents to which 1-nitropyrene and 1,6-dinitropyrene, two PAHs found in diesel exhaust, bind DNA in order to better understand the higher relative mutagenicity of 1,6-Dinitropyrene. DNA binding was determined in rats by assay of tissue isolated from a variety of organs. A subset of rats was pretreated with 1-nitropyrene to determine any effect on induction of nitroreductases and subsequent DNA binding by both nitropyrenes. Subsequent experiments examined the importance of acetylation phenotype in the formation of DNA adducts from the dinitropyrenes.