title: NF-kappaB -94Ins/Del ATTG polymorphism modifies the association between dietary polyunsaturated fatty acids and HDL-cholesterol in two distinct populations.
abstract: We previously showed that polymorphisms in the tumor necrosis factor (TNF)-alpha gene, which is regulated by nuclear factor kappa B (NF-kappaB), modify the association between dietary polyunsaturated fatty acid (PUFA) intake and circulating HDL-cholesterol. Our objective was to determine whether a common polymorphism in the NFKB1 gene (-94Ins/Del ATTG) interacts with PUFA intake to affect HDL-cholesterol in two distinct populations. Participants were diabetes-free young adults (n=593) and older individuals with diet-treated type 2 diabetes (n=103). The NF-kappaB polymorphism modified the association between dietary PUFA intake and HDL-cholesterol in both populations (p=0.02 and 0.005 for interaction). Among individuals with the Ins/Ins genotype, each 1% increase in energy from PUFA was associated with a 0.03+/-0.01 mmol/L (p for slope=0.009) and 0.06+/-0.02 mmol/L (p=0.02) increase in HDL-cholesterol among participants from the diabetes-free and diabetic populations. An inverse relationship was observed among those with the Del/Del genotype, which was significantly different from that of the Ins/Ins groups in both populations (p=0.02 and 0.006). No effects were observed for the Ins/Del genotype in either population (p>0.05). These findings show that this functional polymorphism in the NF-kB gene modifies the association between PUFA intake and plasma HDL-cholesterol in two distinct populations.
authors.affiliation: Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, Canada.
authors.forename: Bénédicte
authors.initials: B
authors.lastname: Fontaine-Bisson
authors.forename: Thomas M S
authors.initials: TM
authors.lastname: Wolever
authors.forename: Philip W
authors.initials: PW
authors.lastname: Connelly
authors.forename: Paul N
authors.initials: PN
authors.lastname: Corey
authors.forename: Ahmed
authors.initials: A
authors.lastname: El-Sohemy
mesh_terms: D000328:Adult; D000368:Aged; D002170:Canada; D008076:Cholesterol, HDL / Q000097:blood*; D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000097:blood / Q000178:diet therapy* / Q000235:genetics; D004041:Dietary Fats / Q000008:administration & dosage*; D005231:Fatty Acids, Unsaturated / Q000008:administration & dosage*; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D052002:NF-kappa B p50 Subunit / Q000235:genetics*; D010641:Phenotype; D011110:Polymorphism, Genetic; D055815:Young Adult
chemical_list: D008076:Cholesterol, HDL; D004041:Dietary Fats; D005231:Fatty Acids, Unsaturated; D052002:NF-kappa B p50 Subunit; C489548:NFKB1 protein, human