title: Influence of apoA-V gene variants on postprandial triglyceride metabolism: impact of gender.
abstract: Although apolipoprotein A-V (apoA-V) polymorphisms have been consistently associated with fasting triglyceride (TG) levels, their impact on postprandial lipemia remains relatively unknown. In this study, we investigate the impact of two common apoA-V polymorphisms (-1131 T>C and S19W) and apoA-V haplotypes on fasting and postprandial lipid metabolism in adults in the United Kingdom (n = 259). Compared with the wild-type TT, apoA-V -1131 TC heterozygotes had 15% (P = 0.057) and 21% (P = 0.002) higher fasting TG and postprandial TG area under the curve (AUC), respectively. Significant (P = 0.038) and nearly significant (P = 0.057) gender x genotype interactions were observed for fasting TG and TG AUC, with a greater impact of genotype in males. Lower HDL-cholesterol was associated with the rare TC genotype (P = 0.047). Significant linkage disequilibrium was found between the apoA-V -1131 T>C and the apoC-III 3238 C>G variants, with univariate analysis indicating an impact of this apoC-III single nucleotide polymorphism (SNP) on TG AUC (P = 0.015). However, in linear regression analysis, a significant independent association with TG AUC (P = 0.007) was only evident for the apoA-V -1131 T>C SNP, indicating a greater relative importance of the apoA-V genotype.
authors.affiliation: Hugh Sinclair Human Nutrition Group, School of Chemistry, Food Biosciences, and Pharmacy, University of Reading, Reading RG6 6AP, United Kingdom.
authors.forename: Estibaliz
authors.initials: E
authors.lastname: Olano-Martin
authors.forename: Elizheeba C
authors.initials: EC
authors.lastname: Abraham
authors.forename: Rosalynn
authors.initials: R
authors.lastname: Gill-Garrison
authors.forename: Ana M
authors.initials: AM
authors.lastname: Valdes
authors.forename: Keith
authors.initials: K
authors.lastname: Grimaldi
authors.forename: Fiona
authors.initials: F
authors.lastname: Tang
authors.forename: Kim G
authors.initials: KG
authors.lastname: Jackson
authors.forename: Christine M
authors.initials: CM
authors.lastname: Williams
authors.forename: Anne M
authors.initials: AM
authors.lastname: Minihane
mesh_terms: D000328:Adult; D000368:Aged; D000072040:Apolipoprotein A-V; D001054:Apolipoproteins A / Q000235:genetics*; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005260:Female; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D019518:Postprandial Period; D012727:Sex Characteristics; D014280:Triglycerides / Q000097:blood*; D006113:United Kingdom
chemical_list: C437704:APOA5 protein, human; D000072040:Apolipoprotein A-V; D001054:Apolipoproteins A; D005230:Fatty Acids, Nonesterified; D014280:Triglycerides