Biochemical basis for differences in metabolism-dependent genotoxicity by two diazinylpiperazine-based 5-HT2C receptor agonists
摘要:
The biochemical basis for S9-dependent mutagenic response of the 5-HT2C receptor agonist and diazinylpiperazine derivative 1 in the Salmonella Ames assay involves P450-mediated bioactivation to DNA-reactive quinone-methide, aldehyde and nitrone intermediates. Mechanistic information pertaining to the metabolism of 1 was used in the design of diazinylpiperazine 5 to eliminate the safety liability. While 5 was negative in the Ames assay, the compound retained the ability of 1 to form certain electrophilic intermediates. Plausible hypotheses that can collectively account for the differences in mutagenic response of the two piperazine analogs are discussed. (C) 2009 Elsevier Ltd. All rights reserved.
Biochemical basis for differences in metabolism-dependent genotoxicity by two diazinylpiperazine-based 5-HT2C receptor agonists
摘要:
The biochemical basis for S9-dependent mutagenic response of the 5-HT2C receptor agonist and diazinylpiperazine derivative 1 in the Salmonella Ames assay involves P450-mediated bioactivation to DNA-reactive quinone-methide, aldehyde and nitrone intermediates. Mechanistic information pertaining to the metabolism of 1 was used in the design of diazinylpiperazine 5 to eliminate the safety liability. While 5 was negative in the Ames assay, the compound retained the ability of 1 to form certain electrophilic intermediates. Plausible hypotheses that can collectively account for the differences in mutagenic response of the two piperazine analogs are discussed. (C) 2009 Elsevier Ltd. All rights reserved.