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British Journal of Nutrition British Journal of Nutrition

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Relation between erythrocyte selenium concentrations and glutathione peroxidase (EC 1.11.1.9) activities of New Zealand residents and visitors to New Zealand

Published online by Cambridge University Press:  09 March 2007

Heather M. Rea ,
Christine D. Thomson ,
Dianne R. Campbell  and
Marion F. Robinson
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Abstract

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1. Erythrocyte, plasma and whole blood selenium concentrations and glutathione peroxidase (EC I.11. 1.9; GSHPx) activities were measured (1) in 104 healthy New Zealand residents living in Otago, a low-soil-Se area (2) in sixty-four surgical patients, including nineteen patients on total parenteral nutrition and twenty-three cancer patients (3) in fifty-two ‘overseas subjects’ (twenty-five visitors to Otago from outside New Zealand and twenty-seven Otago residents on return from overseas travel).

2. Blood Se concentrations reflected dietary Se intake; means for Otago patients, healthy subjects and overseas subjects were different (0043, 0.059, 0.136 μg Se/ml blood respectively) and mean for overseas residents was greater than for New Zealand overseas travellers.

3. Erythrocyte Se concentration was always greater than plasma Se, and plasma Se was a smaller pro- portion of erythrocyte Se for patients compared with the controls.

4. GSHPx activities were different in the three groups, and vaned directly with erythrocyte Se until a plateau was reached at approximately 0.14 μg Se/ml erythrocytes.

5. Overseas subjects showed no relationship between erythrocyte Se and GSHPx activity. This agrees with some overseas studies and the significance of this finding is discussed.

6. Plasma Se concentration remained the most sensitive index of short-term changes in Se status, and erythrocyte Se and GSHPx activities for long-term changes in New Zealand subjects. Use of these measure- ments for overseas subjects with higher blood levels is discussed.

Type
Papers of direct relevance to Clinical and Human Nutrition
Information
British Journal of Nutrition , Volume 42 , Issue 2 , September 1979 , pp. 201 - 208
Copyright
Copyright © The Nutrition Society 1979

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