© 1997 American Heart Association, Inc.
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Effects of Dietary Fat Quality and Quantity on Postprandial Activation of Blood Coagulation Factor VII
From the Research Department of Human Nutrition and Centre for Advanced Food Studies, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark (L.F.L., P.M.), and the Institute for Thrombosis Research, South Jutland University Centre, and Department of Clinical Biochemistry, Ribe County Hospital, Esbjerg, Denmark (E.-M.B., J.J.).
Correspondence to Lone Frost Larsen, Research Department of Human Nutrition, Rolighedsvej 30, DK-1958 Frederiksberg C, Denmark. E-mail lone.f.larsen{at}fhe.kvl.dk
Abstract Acute elevation of the coagulant activity of blood coagulation factor VII (FVIIc) is observed after consumption of high-fat meals. This elevation is caused by an increase in the concentration of activated FVII (FVIIa). In a randomized crossover study, we investigated whether saturated, monounsaturated, or polyunsaturated fats differed regarding postprandial activation of FVII. Eighteen healthy young men participated in the study. On 6 separate days each participant consumed two meals (times, 0 and 13/4 hours) enriched with 70 g (15 and 55 g) of either rapeseed oil, olive oil, sunflower oil, palm oil, or butter (42% of energy from fat) or isoenergetic low-fat meals (6% of energy from fat). Fasting and series of nonfasting blood samples (the last at time 81/2 hours) were collected. Plasma triglycerides, FVIIc, FVIIa, and free fatty acids were analyzed. There were marked effects of the fat quantity on postprandial responses of plasma triglycerides, FVII, and free fatty acids. The high-fat meals caused, in contrast to the low-fat meals, considerable increases in plasma triglycerides. Plasma levels of FVIIc and FVIIa peaks were 7% and 60% higher after consumption of high-fat meals than after consumption of low-fat meals. The five different fat qualities caused similar postprandial increases in plasma triglycerides, FVIIc, and FVIIa. These findings indicate that high-fat meals may be prothrombotic, irrespective of their fatty acid composition. The postprandial FVII activation was not associated with the plasma triglyceride or free fatty acid responses.
Key Words: dietary fat quality • dietary fat quantity • postprandial • blood coagulation factor VII • plasma triglycerides
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