Journal
METABOLISM-CLINICAL AND EXPERIMENTAL
Volume 58, Issue 9, Pages 1222-1228Publisher
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.metabol.2009.04.007
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Funding
- University of Alabama at Birmingham, Coordinating Center
- University of Alabama at Birmingham
- University of Minnesota, Field Center and Diet Reading Center
- Northwestem University, Field Center
- Kaiser Foundation Research Institute
- University of California, Irvine, Echocardiography Reading Center
- Harbor-UCLA Research Education Institute, Computed Tomography Reading Center
- Wake Forest University
- National Heart, Lung, and Blood Institute [N01-HC-95095, N01-HC-48047, N01-HC-48048, N01-HC-48049, N01-HC-48050, N01-HC-45134, N01-HC-05187, N01-HC-45205, N01-HC-45204, T32-HL-007779]
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The Thr54 allele of the intestinal fatty acid-binding protein Ala54Thr functional polymorphism (FABP2) is associated with increased fat oxidation and insulin resistance. We determined the cross-sectional associations of the FABP2 gene with lipid levels and insulin resistance in 2148 participants who completed the year-20 examination of the Coronary Artery Risk Development in Young Adults (CARDIA) study. No significant difference in total cholesterol, low-density or high-density lipoprotein cholesterol, triglycerides, high-density lipoprotein cholesterol to total cholesterol ratio, or homeostasis model assessment of insulin resistance (HOMA-IR) was found between FABP2 genotypes. However, in the presence of a high-saturated fat diet (>= 53.2 g/d, the 90th percentile for the population), the AA/AG genotypes (carriers of the Thr54 allele) of FABP2 had statistically significantly higher levels of log(HOMA-IR) (P = .006) and a lower high-density lipoprotein cholesterol to total cholesterol ratio (P = .03), and borderline statistically significantly higher levels of total cholesterol, low-density lipoprotein cholesterol, and log(triglycerides) (P values = .08, .07, and .05, respectively) compared with those with the GG genotype (Ala54 homozygotes). Lipid levels and log(HOMA-IR) did not vary by genotype with saturated fat intake less than 53.2 g/d. Limiting dietary saturated fat intake may be particularly important among carriers of the A allele of FABP2. (C) 2009 Elsevier Inc. All rights reserved.
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