Generation of radical anions of nitrofurantoin, misonidazole, and metronidazole by ascorbate.
Arch Biochem Biophys
; 255(2): 419-27, 1987 Jun.
Article
em En
| MEDLINE
| ID: mdl-3036006
ABSTRACT
Nitrofurantoin, misonidazole, and metronidazole were reduced to their corresponding nitro anion radicals by ascorbate in anaerobic solutions at high pH. The nitrofurantoin anion radical could be detected at neutral pH. In neutral solutions, the nitro anion radicals of misonidazole and metronidazole were too unstable to be observed by electron spin resonance spectroscopy. At neutral pH, solutions containing ascorbate, nitrofurantoin, or misonidazole consumed oxygen. The addition of superoxide dismutase, catalase, or both superoxide dismutase and catalase decreased the rate of oxygen consumption. These results show that nitro anion radicals are formed by reduction with ascorbate, and superoxide anion radical and hydrogen peroxide are produced by reactions of these radicals with oxygen.
Buscar no Google
Base de dados:
MEDLINE
Assunto principal:
Ácido Ascórbico
/
Metronidazol
/
Misonidazol
/
Nitrofurantoína
Idioma:
En
Ano de publicação:
1987
Tipo de documento:
Article