Adriamycin-catalyzed aerobic photooxidation of NAD dimers to NAD+.
Biochim Biophys Acta
; 991(1): 25-9, 1989 Apr 25.
Article
en En
| MEDLINE
| ID: mdl-2540842
ABSTRACT
The photooxidation of the dimers of nicotinamide adenine dinucleotide, (NAD)2, is catalyzed by adriamycin under aerobic conditions. (NAD)2 and O2 react in 11 molar ratio to yield 2 mol of NAD+. Experiments carried out by irradiating at 340 and 485 nm, corresponding to the absorption maxima of (NAD)2 and adriamycin, respectively, clearly indicate that the process is primed by photoexcitation of adriamycin. The key step of the process is the redox reaction between (NAD)2 and adriamycin with formation of the semiquinone radical anion, identified by the EPR spectrum. The semiquinone is then oxidized back to adriamycin by oxygen with formation of the superoxide radical.
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Banco de datos:
MEDLINE
Asunto principal:
Doxorrubicina
/
Benzoquinonas
/
NAD
Idioma:
En
Revista:
Biochim Biophys Acta
Año:
1989
Tipo del documento:
Article
País de afiliación:
Italia