title: Effect of apolipoprotein E genotype and saturated fat intake on plasma lipids and myocardial infarction in the Central Valley of Costa Rica.
abstract: We assessed the effect of APOE polymorphisms -491 A/T, C112R (APOE*4), and R158C (APOE*2) and saturated fat intake on plasma lipid levels and risk of myocardial infarction (MI) in 1,927 case subjects and 1,927 population-based control subjects matched for age, sex, and residence, all living in the Central Valley of Costa Rica. A significant gene-diet interaction (p = 0.0157) was observed. High saturated fat intake was associated with a 49% increased risk of MI (OR = 1.49; 95% CI, 1.16-1.92) among wildtype subjects. In contrast, high saturated fat intake was associated with a 2.2-fold increased risk of MI among carriers of APOE*2 (OR = 3.17; 95% CI, 1.58-6.36) and with a 1.6-fold increase among carriers of the -491T and APOE*4 variants together (OR = 2.59; 95% CI, 1.38-4.87). Consistently, a high fat diet elicited a greater response in LDL cholesterol among carriers of APOE*2 (+ 17%) and APOE*4 (+ 14%) compared to noncarriers (+6%). The frequency of APOE variants was similar in case and control subjects, although APOE*4 homozygotes were at increased risk of MI compared to noncarriers (OR = 2.26; 95% CI, 1.03-4.98). This study supports the hypothesis that the APOE*2 and APOE*4 variants increase susceptibility to MI in the presence of high saturated fat and could explain inconsistent findings on the effects of these variants on MI in various populations.
authors.affiliation: Department of Nutrition, Harvard School of Public Health, 665 Huntington Ave, Boston, MA 02115, USA.
authors.forename: Yadong
authors.initials: Y
authors.lastname: Yang
authors.forename: Edward
authors.initials: E
authors.lastname: Ruiz-Narvaez
authors.forename: Peter
authors.initials: P
authors.lastname: Kraft
authors.forename: Hannia
authors.initials: H
authors.lastname: Campos
mesh_terms: D001057:Apolipoproteins E / Q000097:blood / Q000235:genetics*; D016022:Case-Control Studies; D002391:Catchment Area, Health; D002784:Cholesterol / Q000097:blood*; D003364:Costa Rica / Q000453:epidemiology; D004041:Dietary Fats / Q000008:administration & dosage*; D005260:Female; D005828:Genetics, Population / Q000379:methods*; D005838:Genotype; D006579:Heterozygote; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood / Q000453:epidemiology / Q000235:genetics*; D011110:Polymorphism, Genetic; D020641:Polymorphism, Single Nucleotide / Q000235:genetics
chemical_list: D001057:Apolipoproteins E; D004041:Dietary Fats; D002784:Cholesterol