4-methylcoumarins as antioxidants: scavenging of peroxyl radicals and inhibition of human low-density lipoprotein oxidation.
Biochimie
; 92(9): 1147-52, 2010 Sep.
Article
em En
| MEDLINE
| ID: mdl-20434515
ABSTRACT
The antioxidant activity of eight synthetic 4-methylcoumarins was systematically studied. The antioxidant capacity was measured using (i) a competition kinetic test, to measure the relative capacity to quench peroxyl radical; (ii) the in vitro oxidative modification of human low-density lipoprotein, initiated by AAPH or catalyzed by copper. In both models, the ortho-OH substitutes were found to be better antioxidant than the meta one. The most efficient antioxidant was the 7,8-dihydroxy-4-methylcoumarin and the corresponding diacetoxy-substituted was unexpectedly a good antioxidant. Finally, the presence of an ethoxycarbonylethyl substituent at the C-3 position increased the antioxidant capacity of both 7,8-dihydroxy-4-methylcoumarin and 7,8-diacetoxy-4-methylcoumarin.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Peróxidos
/
Cumarínicos
/
Lipoproteínas LDL
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Antioxidantes
Limite:
Humans
Idioma:
En
Revista:
Biochimie
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Itália