A simple method for clinical assay of superoxide dismutase.
1988/03/01 by Yi Sun, Y Sun, L W Oberley +3 · 35 citations
Medicine · Biochemistry, Genetics and Molecular Biology · #Cancer Treatment and Pharmacology #Glutathione Transferases and Polymorphisms #Histone Deacetylase Inhibitors Research
paper · doi:10.1093/clinchem/34.3.497
Abstract
This assay for superoxide dismutase (SOD, EC 1.15.1.1) activity involves inhibition of nitroblue tetrazolium reduction, with xanthine-xanthine oxidase used as a superoxide generator. By using a reaction terminator, we can determine 40 samples within 55 min. One unit of activity of pure bovine liver Cu,ZnSOD and chicken liver MnSOD was expressed by 30 ng and 500 ng of protein, respectively. The mean concentrations of Cu,ZnSOD as measured by this method in blood from normal adults were 242 (SEM 4) mg/L in erythrocytes, 548 (SEM 20) micrograms/L in serum, and 173 (SEM 11) micrograms/L in plasma. The Cu,ZnSOD concentrations in serum and plasma of patients with cancer of the large intestine tended to be less and greater than these values, respectively, but not statistically significantly so.
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