PMID: 2508269Oct 16, 1989Paper

Lipid peroxidation in rat liver microsomes: influence of carcinogenic N-nitrosocarbaryl

Toxicology
M BeraudP Carre

Abstract

The reactivities of carbaryl, N-methyl 1-naphthylcarbamate insecticide and its N-nitrosated derivative carcinogenic, N-nitrosocarbaryl, were investigated on the microsomal hepatic lipid peroxidation and NADPH-dependent reductase activities. The in vivo treatment by N-nitrosocarbaryl produced a reduction in lipoperoxidative degradation induced in vitro by NADPH with regard to the formation of malonaldehyde and conjugated dienes. Carbaryl, its precursor did not affect lipid peroxidation under the same in vivo conditions. Moreover, following administration of the 2 compounds, the activities of NADPH-cytochrome c reductase as well as NADPH-neotetrazolium reductase were significantly decreased by N-nitrosocarbaryl but not influenced by carbaryl. Correspondingly, in vitro studies were performed; different action patterns of the 2 tested xenobiotics were also noted after treatment of rat liver microsomes in vitro by carbaryl and N-nitrosocarbaryl especially in their ability to cope with microsomal oxygen activation. N-Nitrosocarbaryl proved to have a potent inhibitor concentration effect on NADPH-dependent chemiluminescence response in vitro; carbaryl was virtually ineffective on this parameter. No significant difference appeared in t...Continue Reading

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Citations

Jul 10, 2007·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·S B HorngT C Wang

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