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Inhibition of tumour necrosis factor-α and interleukin 6 production by mononuclear cells following dietary fish-oil supplementation in healthy men and response to antioxidant co-supplementation

Published online by Cambridge University Press:  09 March 2007

Timothy Trebble ,
Nigel K. Arden ,
Mike A. Stroud ,
Stephen A. Wootton ,
Graham C. Burdge ,
Elizabeth A. Miles ,
Anne B. Ballinger ,
Rachel L. Thompson  and
Philip C. Calder
Timothy Trebble*
Affiliation:
The Institute of Human Nutrition, School of Medicine, University of Southampton, Tremona Road, Southampton SO16 6YD, UK
Nigel K. Arden
Affiliation:
MRC Environmental Epidemiology Unit, University of Southampton, Tremona Road, Southampton General Hospital, Southampton SO16 6YD, UK
Mike A. Stroud
Affiliation:
The Institute of Human Nutrition, School of Medicine, University of Southampton, Tremona Road, Southampton SO16 6YD, UK
Stephen A. Wootton
Affiliation:
The Institute of Human Nutrition, School of Medicine, University of Southampton, Tremona Road, Southampton SO16 6YD, UK
Graham C. Burdge
Affiliation:
The Institute of Human Nutrition, School of Medicine, University of Southampton, Tremona Road, Southampton SO16 6YD, UK
Elizabeth A. Miles
Affiliation:
The Institute of Human Nutrition, School of Medicine, University of Southampton, Tremona Road, Southampton SO16 6YD, UK
Anne B. Ballinger
Affiliation:
Department of Adult and Paediatric Gastroenterology, Barts and the London, Queen Mary's School of Medicine and Dentistry, University of London, London E1 2AD, UK
Rachel L. Thompson
Affiliation:
The Institute of Human Nutrition, School of Medicine, University of Southampton, Tremona Road, Southampton SO16 6YD, UK
Philip C. Calder
Affiliation:
The Institute of Human Nutrition, School of Medicine, University of Southampton, Tremona Road, Southampton SO16 6YD, UK
*
*Corresponding author: T. Trebble, fax +44 2380 794945, email timothy.trebble@btopenworld.com
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Abstract

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Increased dietary consumption of the n-3 polyunsaturated fatty acids (PUFA) eicosapentaenoic acid (20:5n-3; EPA) and docosahexaenoic acid (22:6n-6; DHA) is associated with their incorporation into circulating phospholipid and increased production of lipid peroxide metabolites. The relationship between peripheral blood mononuclear cell (PBMC) function, n-3 PUFA intake and antioxidant co-supplementation is poorly defined. We therefore investigated tumour necrosis factor (TNF)-α and interleukin (IL) 6 production by PBMC and phospholipid fatty acid composition in plasma and erythrocytes of healthy male subjects (n 16) receiving supplemental intakes of 0·3, 1·0 and 2·0 g EPA+DHA/d, as consecutive 4-week courses. All subjects were randomised in a double-blind manner to receive a concurrent antioxidant supplement (200 μg Se, 3 mg Mn, 30 mg D-α-tocopheryl succinate, 90 mg ascorbic acid, 450 μg vitamin A (β-carotene and retinol)) or placebo. There was a positive dose-dependent relationship between dietary n-3 PUFA intake and EPA and DHA incorporation into plasma phosphatidylcholine and erythrocyte phosphatidylethanolamine, with a tendency towards a plateau at higher levels of intake. Production of TNF-α and IL-6 by PBMC decreased with increasing n-3 PUFA intake but tended towards a ‘U-shaped’ dose response. Both responses appeared to be augmented by antioxidant co-supplementation at intermediate supplementary n-3 PUFA intakes. Thus, increased dietary n-3 PUFA consumption resulted in defined but contrasting patterns of modulation of phospholipid fatty acid composition and PBMC function, which were further influenced by antioxidant intake.

Keywords

Fish oilAntioxidantsTumour necrosis factor-αInterleukin 6
Type
Research Article
Information
British Journal of Nutrition , Volume 90 , Issue 2 , August 2003 , pp. 405 - 412
Copyright
Copyright © The Nutrition Society 2003

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