In vitro inhibition effects of some coumarin derivatives on human erythrocytes glucose-6-phosphate dehydrogenase activities

Abstract Inhibitory effects of some synthesized dihydroxycoumarin compounds on purified G6PD were investigated. For this purpose, initially human erythrocyte G6PD was purified 7069-fold in a yield of 33.6% by using ammonium sulfate precipitation and affinity chromatography which includes 2′,5′-ADP Sepharose 4B. The purified enzyme showed a single band on sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Enzyme activity was determined spectrophotometrically according to Beutler method at 340 nm. 6,7-Dihydroxy-3-(2-methylphenyl)-2H-chromen-2-one (OPC), 6,7-dihydroxy-3-(3-methylphenyl)-2H-chromen-2-one (MPC) and 6,7-dihydroxy-3-(4-methylphenyl)-2H-chromen-2-one (PPC) were used as dihydroxycoumarin compounds. This study has demonstrated that G6PD activity is very highly sensitive to study coumarin derivatives.

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