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Superoxide dismutase assay using alkaline dimethylsulfoxide as superoxide anion-generating system
Analytical Biochemistry
|December 1, 1983
Summary
A new assay using alkaline dimethylsulfoxide and cytochrome c was developed to measure superoxide dismutase (SOD) activity. This sensitive and specific method allows for rapid SOD measurements in biological samples.
Area of Science:
- Biochemistry
- Enzymology
Background:
- Superoxide dismutase (SOD) is a critical enzyme in cellular defense against oxidative stress.
- Accurate and efficient assays for SOD activity are essential for biological research.
Purpose of the Study:
- To develop a novel, sensitive, and specific assay for quantifying superoxide dismutase activity.
Main Methods:
- Utilized an alkaline dimethylsulfoxide system to generate superoxide anions.
- Employed cytochrome c as a scavenger to indicate superoxide anion levels.
- Developed a new assay for superoxide dismutase activity based on this system.
Main Results:
- The assay demonstrated high sensitivity, detecting as little as 110 ng of purified copper-containing superoxide dismutase per unit of activity.
- The assay exhibited high specificity, minimizing common interferences.
- The method allows for rapid and multiple measurements of SOD activity.
Conclusions:
- A new, robust assay for superoxide dismutase activity has been established.
- This assay is suitable for both manual and automated procedures in biological preparations.
- The assay's sensitivity and specificity make it valuable for oxidative stress research.