Preneoplastic lesions, DNA adduct formation and mutagenicity of 5-, 7- and 9-hydroxy-2-nitrofluorene, metabolites of the air pollutant 2-nitrofluorene
作者:Xian-Shu Cui、Jan Bergman、Lennart Möller
DOI:10.1016/s0165-1218(96)90022-1
日期:1996.8
The metabolites of 2-nitrofluorene (NF), 5-, 7- and 9-OH-2-nitrofluorene (OH-NF) were compared for their genotoxicity, Seventy-two hours after intraperitoneal administration of these substances individually to rats (100 mg/kg body wt.), DNA adducts in liver tissue were analyzed with P-32-TLC and P-32-HPLC. An in vivo liver model was used to test the initiating capacity of the said substances for the formation of preneoplastic lesions, 5-OH-NF showed low capacity to induce DNA adduct formation and low potential as initiator to induce preneoplastic lesions-foci/nodules in the liver of rats, Both 7- acid 9-OH-NF induced DNA adducts and preneoplastic liver lesions but with smaller quantities compared to NF, It seems that 7- and 9-OH-NF can not be considered as detoxification products of NF. In general, the initiating capacity of these substances for the formation of preneoplastic lesions has a good correlation with their potency to form DNA adducts.