title: Concordance of two multiple analytical approaches demonstrate that interaction between BMI and ADIPOQ haplotypes is a determinant of LDL cholesterol in a general French population.
abstract: Genetic and environmental factors are involved in insulin resistance (IR). IR and dyslipidemia associate with increased risk of cardiovascular diseases. Plasma low-density lipoprotein cholesterol (LDL-C) level is a marker of cardiovascular risk. In a Caucasian general population we aimed at determining the multifactorial components of LDL-C levels using 10 genes and 3 phenotypes. In the PPARG, UCP3, ADIPOQ, TNF, LIPC, CARTPT, PCSK9, SCAP, SCARB1 and ENPP1 genes known to be associated with IR or dyslipidemia we genotyped 19 single nucleotide polymorphisms (SNPs) in 846 subjects. When several SNPs were genotyped for a given gene we constructed haplotypes. Including genetic and environmental variables (gender, body mass index (BMI) and adiponectin level) we used (1) the multifactor dimensionality reduction method to explain clusters of high and low LDL-C, and (2) the restricted partition method to explain LDL-C levels. Both methods showed that BMI and haplotypes at the ADIPOQ adiponectin encoding gene but not adiponectin level itself, were discriminant regarding to LDL-C. Subjects bearing an at-risk combination of BMI and ADIPOQ genotypes were prone to have a higher LDL-C (OR=3.13, 95% CI=2.20-4.46, P<0.0001). Our results suggest that in interaction with BMI, ADIPOQ haplotypes capture genetic variation(s) from neighboring gene(s) that would modulate LDL-C level.
authors.affiliation: Biostatistics Department EA2694, University Hospital, University Lille Nord de France, UDSL, Lille cedex, France. francis.vasseur@univ-lille2.fr
authors.forename: Francis
authors.initials: F
authors.lastname: Vasseur
authors.forename: Thomas
authors.initials: T
authors.lastname: Caeyseele
authors.forename: Mouna
authors.initials: M
authors.lastname: Barat-Houari
authors.forename: Stéphane
authors.initials: S
authors.lastname: Lobbens
authors.forename: Aline
authors.initials: A
authors.lastname: Meirhaeghe
authors.forename: David
authors.initials: D
authors.lastname: Meyre
authors.forename: Philippe
authors.initials: P
authors.lastname: Froguel
authors.forename: Philippe
authors.initials: P
authors.lastname: Amouyel
authors.forename: Nicole
authors.initials: N
authors.lastname: Helbecque
mesh_terms: D052242:Adiponectin / Q000235:genetics*; D015992:Body Mass Index; D008078:Cholesterol, LDL / Q000097:blood*; D004843:Epistasis, Genetic; D005260:Female; D005602:France; D005828:Genetics, Population; D005838:Genotype; D006239:Haplotypes / Q000235:genetics*; D006801:Humans; D008297:Male; D020412:Multifactorial Inheritance; D015999:Multivariate Analysis; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide; D044465:White People / Q000235:genetics
chemical_list: D052242:Adiponectin; D008078:Cholesterol, LDL