Effects of phenol compounds, glutathione analogues and a diuretic drug on glutathione S-transferase, glutathione reductase and glutathione peroxidase from canine erythrocytes.
作者信息
Kurata M, Suzuki M, Takeda K
机构信息
Department of Veterinary Medicine, Faculty of Agriculture, Gifu University, Japan.
出版信息
Comp Biochem Physiol B. 1992 Dec;103(4):863-7. doi: 10.1016/0305-0491(92)90206-7.
Phenol compounds (ellagic acid, quercetin and purpurogallin), glutathione analogues (S-hexylglutathione and S-octylglutathione) and a diuretic drug (ethacrynic acid) were compared for their inhibitory effects on glutathione S-transferase (GST), glutathione reductase (GR) and glutathione peroxidase (GSH-Px) in the canine erythrocytes. 2. All these compounds inhibited GST activity; quercetin was found to be the most potent inhibitor. 3. Ellagic acid, purpurogallin, quercetin and ethacrynic acid inhibited GR activity; S-hexylglutathione and S-octylglutathione had no effect on GR and GSH-Px activities. 4. Quercetin and purpurogallin inhibited GST non-competitively toward glutathione, whereas ellagic acid showed a competitive inhibition. Ellagic acid and purpurogallin inhibited GR non-competitively toward oxidized glutathione.