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Relationship between apolipoprotein E polymorphism, postprandial hyperlipemia and hemostatic variables in patients
A Nordøy1, K H Bønaa, P M Sandset
1Department of Medicine, University of Tromsø, Norway.
Background And Aim:
Combined hyperlipemia is a common lipid abnormality associated with coronary heart disease (CHD). Aim of this study was to investigate the relationship between this abnormality and hemostatic risk factors related to thrombosis.
Methods And Results:
Forty-one patients were examined in the fasting state and during postprandial hyperlipemia. They had high levels of factor VIIc in the fasting state. During postprandial hyperlipemia a highly significant (p < 0.001) increase of activated factor (VIIa) occurred. This activation was not correlated to the increase in free fatty acids, but to the degree of postprandial hypertriglyceridemia. The absolute postprandial triglyceridemia was highest in subjects with the apolipoprotein (apo) E2 allele. Tissue factor pathway inhibitor activity (TFPIa) was correlated to LDL cholesterol and apo B concentrations and was highest in subjects with genotypes containing the E4 allele.
Conclusions:
Subjects with combined hyperlipemia may have an increased thrombotic risk related to activation of factor VII during postprandial hyperlipemia. Subjects with genotypes including the apoE4 allele may have a high lipid risk profile associated with high levels of LDL cholesterol.