Abstract
The bright chemiluminescence has been observed in the system: Co(2+)/hydrogen peroxide/lucigenin. The chemiluminescence intensity was directly proportional to either cobalt, hydrogen peroxide, or lucigenin concentrations. A procedure of determination of superoxide dismutase (SOD) activity by the chemiluminescence method in the cobalt-hydrogen peroxide-lucigenin system at pH 8.5 is suggested. A linear dependence was established between a relative chemiluminescence intensity and SOD concentration in the range of SOD concentrations between 0 and 4.5 nM, c (1/2) = 0.8 nM. The determination of SOD activity was performed in several tissue samples (rat plasma, erythrocyte hemolysate, and liver mitochondria). A technique of tissue sample preparation with the use of thermal inactivation of interfering proteins at 60 °C was used. The method was successfully applied for comparison of the efficiency of SOD mimetics.
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