Arja T Erkkilä1, Ursula S Schwab2, Seppo Lehto3, Vanessa D de Mello4, Antti J Kangas5, Pasi Soininen6, Mika Ala-Korpela7, Matti I J Uusitupa8. 1. Institute of Public Health and Clinical Nutrition, Kuopio Campus, University of Eastern Finland, Kuopio, Finland. Electronic address: arja.erkkila@uef.fi. 2. Institute of Public Health and Clinical Nutrition, Kuopio Campus, University of Eastern Finland, Kuopio, Finland; Institute of Clinical Medicine, Kuopio University Hospital, Kuopio, Finland. 3. Institute of Clinical Medicine, Kuopio University Hospital, Kuopio, Finland. 4. Institute of Public Health and Clinical Nutrition, Kuopio Campus, University of Eastern Finland, Kuopio, Finland. 5. Computational Medicine, Institute of Health Sciences, University of Oulu, Oulu, Finland. 6. NMR Metabolomics Laboratory, School of Pharmacy, Kuopio Campus, University of Eastern Finland, Kuopio, Finland. 7. Computational Medicine, Institute of Health Sciences, University of Oulu, Oulu, Finland; NMR Metabolomics Laboratory, School of Pharmacy, Kuopio Campus, University of Eastern Finland, Kuopio, Finland; Computational Medicine, School of Social and Community Medicine, University of Bristol, Bristol, UK; Oulu University Hospital, Oulu, Finland. 8. Institute of Public Health and Clinical Nutrition, Kuopio Campus, University of Eastern Finland, Kuopio, Finland; Research Unit, Kuopio University Hospital, Kuopio, Finland.
Abstract
BACKGROUND: Fish oil intake reduces serum triglycerides; however, little is known about the effects of dietary fish intake on lipoprotein subclasses. OBJECTIVE: We aimed at assessing the effect of fatty and lean fish intake on the lipoprotein subclasses in an intervention study. METHODS: The intervention study included 33 patients with coronary heart disease, who were aged 61.0 ± 5.8 (mean ± SD) years. The subjects were randomly assigned to a fatty fish (n = 11), lean fish (n = 12), or control (n = 10) diet for 8 weeks. Fish diets included at least 4 fish meals per week. Subjects in the control group consumed lean beef, pork, and chicken. Lipoprotein subclasses and their lipid components were determined by nuclear magnetic resonance spectroscopy. RESULTS: Concentrations of n-3 fatty acids and docosahexaenoic acid increased in the fatty fish group. The concentrations of cholesterol, cholesterol esters, and total lipids in very large high-density lipoproteins (HDLs) increased in the fatty fish group (overall difference P = .005, P = .002, and P = .007, respectively; false discovery rate P = .04, P = .04, and P = .05, respectively). The mean size of HDL particles increased in the fatty fish group (9.8 ± 0.3 nm at baseline and 9.9 ± 0.4 nm at end of study; overall difference P = .004, false discovery rate P = .04). The fish diets did not affect very-low-density lipoprotein or low-density lipoprotein size. CONCLUSION: Fatty fish intake at least 4 times per week increases HDL particle size which might have beneficial effect in patients with coronary heart disease.
BACKGROUND: Fish oil intake reduces serum triglycerides; however, little is known about the effects of dietary fish intake on lipoprotein subclasses. OBJECTIVE: We aimed at assessing the effect of fatty and lean fish intake on the lipoprotein subclasses in an intervention study. METHODS: The intervention study included 33 patients with coronary heart disease, who were aged 61.0 ± 5.8 (mean ± SD) years. The subjects were randomly assigned to a fatty fish (n = 11), lean fish (n = 12), or control (n = 10) diet for 8 weeks. Fish diets included at least 4 fish meals per week. Subjects in the control group consumed lean beef, pork, and chicken. Lipoprotein subclasses and their lipid components were determined by nuclear magnetic resonance spectroscopy. RESULTS: Concentrations of n-3 fatty acids and docosahexaenoic acid increased in the fatty fish group. The concentrations of cholesterol, cholesterol esters, and total lipids in very large high-density lipoproteins (HDLs) increased in the fatty fish group (overall difference P = .005, P = .002, and P = .007, respectively; false discovery rate P = .04, P = .04, and P = .05, respectively). The mean size of HDL particles increased in the fatty fish group (9.8 ± 0.3 nm at baseline and 9.9 ± 0.4 nm at end of study; overall difference P = .004, false discovery rate P = .04). The fish diets did not affect very-low-density lipoprotein or low-density lipoprotein size. CONCLUSION: Fatty fish intake at least 4 times per week increases HDL particle size which might have beneficial effect in patients with coronary heart disease.
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