title: APOE polymorphism and angiographic coronary artery disease severity in the Women's Ischemia Syndrome Evaluation (WISE) study.
abstract: Genetic variation in the apolipoprotein E (APOE) gene is a significant determinant of variation in plasma cholesterol levels and it also affects the risk of coronary artery disease (CAD). We examined the association of the APOE polymorphism with CAD severity in women from the NHLBI-sponsored Women's Ischemia Syndrome Evaluation (WISE) study. Quantitative coronary angiography was used to classify subjects as having normal/minimal CAD (<20% stenosis), mild CAD (20-49% stenosis) and significant CAD (>or=50% stenosis). The women with or=50% stenosis were further stratified according to the number of vessel disease they have (one, two, or three). In white subjects, the frequency of APOE*4 carriers (3/4 and 4/4 genotypes) was significantly higher in the combined mild/significant CAD group (>or=20% stenosis) compared with the normal/minimal CAD group (<20% stenosis) (31.3 vs. 19.2%; P=0.025) with an adjusted OR of 2.40 (95% CI: 1.47-3.93; P=0.0005). Furthermore, the APOE*4 allele was found to be significantly associated with the increased vessel disease number (chi(2)=8.04; P=0.0046). This association of the APOE*4 allele with CAD severity was present only in women with family history of CAD. APOE polymorphism also showed significant associations with increasing plasma total cholesterol (P=0.01) and low-density lipoprotein (LDL)-cholesterol (P<0.001) in whites. These data support the hypothesis that the APOE*4 allele is an independent risk factor not only for the presence of CAD and hyperlipidemia, but also for the angiographic severity of CAD in white women with a family history of disease.
authors.affiliation: Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, 130 De Soto Street, Pittsburgh, PA 15261, USA. qi.chen@mail.hgen.pitt.edu
authors.forename: Qi
authors.initials: Q
authors.lastname: Chen
authors.forename: Steven E
authors.initials: SE
authors.lastname: Reis
authors.forename: Candace M
authors.initials: CM
authors.lastname: Kammerer
authors.forename: Dennis M
authors.initials: DM
authors.lastname: McNamara
authors.forename: Richard
authors.initials: R
authors.lastname: Holubkov
authors.forename: Barry L
authors.initials: BL
authors.lastname: Sharaf
authors.forename: George
authors.initials: G
authors.lastname: Sopko
authors.forename: Daniel F
authors.initials: DF
authors.lastname: Pauly
authors.forename: C Noel
authors.initials: CN
authors.lastname: Bairey Merz
authors.forename: M Ilyas
authors.initials: MI
authors.lastname: Kamboh
mesh_terms: D000483:Alleles; D053327:Apolipoprotein E4; D001057:Apolipoproteins E / Q000235:genetics*; D044383:Black People; D017023:Coronary Angiography; D003327:Coronary Disease / Q000097:blood / Q000000981:diagnostic imaging / Q000235:genetics*; D005260:Female; D006801:Humans; D008055:Lipids / Q000097:blood; D008875:Middle Aged; D011110:Polymorphism, Genetic; D044465:White People
chemical_list: D053327:Apolipoprotein E4; D001057:Apolipoproteins E; D008055:Lipids