Clinical Chemistry
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Clinical Chemistry 43: 562-568, 1997;
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(Clinical Chemistry. 1997;43:562-568.)
© 1997 American Association for Clinical Chemistry, Inc.

Articles

Antioxidative enzyme activities in human erythrocytes

Helle Raun Andersena, Jesper B. Nielsen, Flemming Nielsen and Philippe Grandjean

Department of Environmental Medicine, Odense University, Winsløwparken 17, DK-5000 Odense C, Denmark.
a Author for correspondence. Fax +45 65 91 14 58; e-mail HR.ANDERSEN{at}Winsloew.OU.DK

Reliable and standardized methods are necessary to determine the expression of antioxidative enzymes and their role in maintaining health. In addition, the variability of the enzyme activities within the general population caused by age, gender, and life-style factors must be described. This study describes methodological conditions that are suitable for analyzing copper–zinc superoxide dismutase (CuZn-SOD), glutathione peroxidase (GSH-Px), catalase (CAT), and glutathione reductase (GR) in human erythrocytes with a high degree of reproducibility. Intervals for the enzyme activities have been established in a randomly selected population of 220 individuals between 20 and 89 years of age. An age-related decrease was observed in CuZn-SOD and GR activities, whereas no age-related changes were demonstrated for GSH-Px and CAT. The GSH-Px activity was positively associated with the intake of dietary supplements and negatively correlated with tobacco consumption. These factors probably account for the fact that women tended to have higher GSH-Px activity.


Key Words: indexing terms: superoxide dismutase • glutathione peroxidase • glutahione reductase • catalase • biological variability




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