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American Journal of Clinical Nutrition, Vol 36, 15-23, Copyright © 1982 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Blood selenium and glutathione peroxidase activity in pregnant women: comparative assays in primates and other animals

JA Butler, PD Whanger and MJ Tripp

The influence of pregnancy on blood selenium levels and glutathione peroxidase (GSH-Px) activity was studied in women. Whole blood and plasma selenium levels decreased whereas erythrocyte and plasma GSH-Px activities increased with the progress of pregnancy. The ratio of erythrocyte GSH-Px activity to whole blood selenium levels was 4- to 5- fold higher in rats and sheep than in primates (humans and monkeys), suggesting that more selenium is associated with GSH-Px in erythrocytes from rats and sheep than from primates. In assays of blood with low GSH- Px activity such as that from humans or selenium-deficient animals, a component of the erythrocyte other than GSH-Px was found to contribute more to the peroxidase activity. Evidence was obtained to indicate that t-butyl hydroperoxide is a better substrate than hydrogen peroxide for the assay of low GSH-Px erythrocyte activity. The length of time that the blood was stored before assay was found to have an effect on erythrocyte GSH-Px activity, and the storage patterns may be dependent on the species of animal from which the blood is drawn.


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 J. Clin. Endocrinol. Metab.Home page
W. C. Hawkes
Association of Glutathione Peroxidase Activity with Insulin Resistance and Dietary Fat Intake during Normal Pregnancy
J. Clin. Endocrinol. Metab., September 1, 2004; 89(9): 4772 - 4773.
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Copyright © 1982 by The American Society for Nutrition