Oxidation of acetylacetone catalyzed by horseradish peroxidase in the absence of hydrogen peroxide
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Data
2006-12-01
Autores
Rodrigues, Ana Paula
da Fonseca, Luiz Marcos
de Faria Oliveira, Olga M.
Brunetti, Iguatemy Lourenço [UNESP]
Ximenes, Valdecir Farias [UNESP]
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Editor
Elsevier B.V.
Resumo
Horseradish peroxidase (HRP) is a plant enzyme widely used in biotechnology, including antibody-directed enzyme prodrug therapy (ADEPT). Here, we showed that HRP is able to catalyze the autoxidation of acetylacetone in the absence of hydrogen peroxide. This autoxidation led to generation of methylglyoxal and reactive oxygen species. The production of superoxide anion was evidenced by the effect of superoxide dismutase and by the generation of oxyperoxidase during the enzyme turnover. The HRP has a high specificity for acetylacetone, since the similar beta-dicarbonyls dimedon and acetoacetate were not oxidized. As this enzyme prodrug combination was highly cytotoxic for neutrophils and only requires the presence of a non-human peroxidase and acetylacetone, it might immediately be applied to research on the ADEPT techniques. The acetylacetone could be a starting point for the design of new drugs applied in HRP-related ADEPT techniques. (c) 2006 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
horseradish peroxidase, acetylacetone, methylglyoxal, reactive oxygen species, antibody-directed enzyme prodrug therapy
Como citar
Biochimica Et Biophysica Acta-general Subjects. Amsterdam: Elsevier B.V., v. 1760, n. 12, p. 1755-1761, 2006.