Scavenging effects of tetramethylpyrazine on active oxygen free radicals.
Zhongguo Yao Li Xue Bao
; 15(3): 229-31, 1994 May.
Article
em En
| MEDLINE
| ID: mdl-7976377
ABSTRACT
The scavenging effects of tetramethylpyrazine (ligustrazine, Lig) isolated from Ligusticum wallichii Franch on active oxygen free radicals were studied using spin trapping technic and chemiluminescence methods. The scavenging rate of superoxide anion (O2-.) by Lig (25 mg.ml-1) was 100% in xanthine/xanthine oxidase (Xan/XO) system, and that of hydroxyl radical (OH-.) was 44% in Fenton's reaction. The scavenging rate of lipid peroxyl radical (LOO-.) by Lig (25 mg.ml-1) was 80% in peroxidizing microsome system. It is possible that Lig scavenged O2-. by catalyzing its spontaneous dismutation. The results showed that Lig had strong effects of scavenging cyotoxic oxygen free radicals (O2-., LOO-., OH-.).
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Base de dados:
MEDLINE
Assunto principal:
Pirazinas
/
Sequestradores de Radicais Livres
Idioma:
En
Ano de publicação:
1994
Tipo de documento:
Article