Thromb Haemost 2003; 89(04): 654-659
DOI: 10.1055/s-0037-1613571
Blood Coagulation, Fibrinolysis and Cellular Haemostasis
Schattauer GmbH

Do oxidized fatty acids activate coagulation factor VII during post-prandial lipemia in women?

Robert Wilson
2   Cardiovascular Research, University of Edinburgh, Edinburgh, UK
,
Karin Lyall
2   Cardiovascular Research, University of Edinburgh, Edinburgh, UK
,
Margaret E. Millar
2   Cardiovascular Research, University of Edinburgh, Edinburgh, UK
,
Louise Smyth
2   Cardiovascular Research, University of Edinburgh, Edinburgh, UK
,
Claire Pearson
2   Cardiovascular Research, University of Edinburgh, Edinburgh, UK
,
Rudolph A. Riemersma
1   Department of Medical Physiology, University of Tromsø, Tromsø, Norway
› Author Affiliations
Further Information

Publication History

Received 24 April 2002

Accepted after revision 23 December 2002

Publication Date:
07 December 2017 (online)

Preview

Summary

Factor VII is activated to VIIa within hours after dietary fat, irrespective of its fatty acid composition. Edible oils contain oxidized material (hydroxy fatty acids, HOFA). Twenty-five fasting women, aged 38 (10) years, consumed 30 g walnut oil containing 26 (6) mg HOFA. Blood was collected 2-hourly to measure plasma triglycerides and plasma lipid HOFA by gas chromatography/mass spectrometry. VII and sTF-dependent VIIa were quantified at 0, 6 and 24 h. Increased plasma triglycerides and HOFA (areas under the-curve 0-8 h, AUC) were related r = 0.83, p <0.001. VIIa increased from 2.6 (1.4) to 4.2 (1.9) ng/mL at 6 h (p <0.001). Plasma VII remained constant. VIIa (6 h) was related to plasma triglycerides- and HOFA-AUC: r = 0.38 and 0.53, respectively (both p <0.05). Plasma VIIa was also related to body weight, fasting triglycerides, HOFA and VII. Only HOFA-AUC and body weight related to VIIa (6 h) in stepwise regression analysis (p = 0.007 and 0.038, respectively). Oxidized, not normal, fat activates VII and could increase coronary risk in humans.