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LDL cholesterol-raising effect of low-dose docosahexaenoic acid in middle-aged men and women

Theobald, HE; Chowienczyk, PJ; Whittall, R; Humphries, SE; Sanders, TAB; (2004) LDL cholesterol-raising effect of low-dose docosahexaenoic acid in middle-aged men and women. AM J CLIN NUTR , 79 (4) 558 - 563.

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Abstract

Background: Long-chain n-3 polyunsaturated fatty acids have variable effects on LDL cholesterol, and the effects of docosahexaenoic acid (DHA) are uncertain.Objective: The objective of the study was to determine the effect on blood lipids of a daily intake of 0.7 g DHA as triacylglycerol in middle-aged men and women.Design: Men and women aged 40-65 y (n = 38) underwent a double-blind, randomized, placebo-controlled, crossover trial of treatment with 0.7 g DHA/d for 3 mo.Results: DHA supplementation increased the DHA concentration in plasma by 76% (P < 0.0001) and the proportion in erythrocyte lipids by 58% (P < 0.0001). Values for serum total cholesterol, LDL cholesterol, and plasma apolipoprotein B concentrations were 4.2% (0.22 mmol/L; P = 0.04), 7.1% (0.23 mmol/L; P = 0.004), and 3.4% (P = 0.03) higher, respectively, with DHA treatment than with placebo. In addition, the LDL cholesterol: apolipoprotein B ratio was 3.1% higher with DHA treatment than with placebo (P = 0.04), which suggested an increase in LDL size. Plasma lathosterol and plant sterol concentrations were unaffected by treatment.Conclusion: A daily intake of approximate to0.7 g DHA increases LDL cholesterol by 7% in middle-aged men and women. It is suggested that DHA down-regulates the expression of the LDL receptor.

Type:Article
Title:LDL cholesterol-raising effect of low-dose docosahexaenoic acid in middle-aged men and women
Keywords:lipids, docosahexaenoic acid, LDL, POLYUNSATURATED FATTY-ACIDS, CORONARY HEART-DISEASE, LOW-DENSITY-LIPOPROTEIN, FISH-OIL, EICOSAPENTAENOIC ACID, PLASMA-LIPOPROTEINS, SERUM-LIPOPROTEINS, RISK-FACTORS, HUMANS, SUPPLEMENTATION
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Cardiovascular Science

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