Association of apolipoprotein E polymorphism with myocardial infarction in Greek patients with coronary artery disease

Genovefa Kolovou, Nikos Yiannakouris, Marilena Hatzivassiliou, John Malakos, Deliana Daskalova, George Hatzigeorgiou, Marios A Cariolou, Dennis V Cokkinos
Current Medical Research and Opinion 2002, 18 (3): 118-24
Studies in several populations have indicated that genetic variation at the apolipoprotein E (apoE) structural locus influences the risk of coronary artery disease (CAD) and myocardial infarction (MI). This study aimed at investigating whether apoE polymorphism has an allelic and/or genotypic impact on the risk of MI in Greek patients with CAD. We compared apoE gene polymorphism in a group of patients with angiographically confirmed CAD but not MI [CAD/MI (-)-group, n = 143] and a group of age and sex-matched CAD patients who had experienced a non-fatal Ml [CAD/MI (+)-group, n = 124]. The patients were also compared with a group of healthy younger individuals (n = 240) with no family history of CAD. The apoE genotype distribution differed significantly between the two groups of CAD patients (p = 0.02). The epsilon2 allele was 5.3-fold less frequent in the CAD/ MI (+)-group compared with the CAD/MI (-)-group (1.2% vs. 6.3%, p = 0.01). The frequency of the epsilon2 allele in healthy subjects was 8.1%, which is 6.8-fold higher than in CAD/MI (+)-patients (p = 0.001) and twice as high compared with all CAD patients (p = 0.02). No differences in epsilon4 allele frequencies were observed between CAD/MI (+)- and CAD/MI (-)-patients (10.9% vs. 9.8%), or between patients with CAD and healthy subjects (10.3% vs. 10.2%). In summary, the epsilon4 allele was not found to be associated with an increased risk for CAD or MI. In contrast, a negative association of the epsilon2 allele with Ml was observed among Greek patients with CAD.

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