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Does cotinine act upon reactive oxygen species and peroxidases?

Nicotine, an oxidizing agent, is certainly one of the most widely used alkaloids in the world. It is, together with its main metabolite, cotinine, responsible for tobacco-dependence. The use of tobacco is closely associated with lung disease, morphological leukocyte modification and generation of ox...

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Published in:Eclética química 2007, Vol.32 (1), p.65-70
Main Authors: Vellosa, J.C.R., Khalil, N.M., Fonseca, L.M., Brunetti, I.L., Oliveira, O.M.M.F.
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description Nicotine, an oxidizing agent, is certainly one of the most widely used alkaloids in the world. It is, together with its main metabolite, cotinine, responsible for tobacco-dependence. The use of tobacco is closely associated with lung disease, morphological leukocyte modification and generation of oxidant species. The aim of this study was to look for a possible relationship between cotinine, oxidant species generation and oxidative processes. After studying the action of cotinine in some chemical oxidation models and on the enzymatic kinetics of peroxidases (myeloperoxidase and horseradish peroxidase), we concluded that cotinine does not act directly upon H2O2, HOCl, taurine chloramines, horseradish peroxidase or myeloperoxidase. A nicotina, um agente oxidante, é certamente um dos alcalóides mais amplamente utilizados no mundo. Juntamente com seu principal metabolito, a cotinina, a nicotina é responsável pela tabaco-dependência. O uso de tabaco está intimamente associado a doenças pulmonares, modificações morfológicas em leucócitos e a geração de espécies oxidantes. O principal objetivo deste estudo foi identificar uma possível relação entre cotinina, geração de espécies reativas do oxigênio e processos oxidativos. Após o estudo da ação da cotinina em diferentes modelos químicos e em cinéticas enzimáticas com peroxidases (mieloperoxidase e peroxidase de raiz forte), conclui-se que a cotinina não age diretamente sobre H2O2, HOCl, taurine cloramina, peroxidase de raiz forte ou mieloperoxidase.
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title Does cotinine act upon reactive oxygen species and peroxidases?
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