Replication of genetic association studies in aortic stenosis in adults

Auteur(s): Gaudreault, NathalieDucharme, ValérieLamontagne, MaximeGuauque-Olarte, SandraMathieu, PatrickPibarot, PhilippeBossé, Yohan
Résumé: Only a handful of studies have attempted to unravel the genetic architecture of calcific aortic valve stenosis (AS). The goal of this study was to validate genes previously associated with AS. Seven genes were assessed: APOB, APOE, CTGF, IL10, PTH, TGFB1, and VDR. Each gene was tested for a comprehensive set of single-nucleotide polymorphisms (SNPs). SNPs were genotyped in 457 patients who underwent surgical aortic valve replacement, and allele frequencies were compared to 3,294 controls. A missense mutation in the APOB gene was significantly associated with AS (rs1042031, E4181K, p = 0.00001). A second SNP located 5.6 kilobases downstream of the APOB stop codon was also associated with the disease (rs6725189, p = 0.000013). Six SNPs surrounding the IL10 locus were strongly associated with AS (0.02 > p > 6.2 × 10¯¹¹). The most compelling association for IL10 was found with a promoter polymorphism (rs1800872) well known to regulate the production of the encoded anti-inflammatory cytokine. The frequency of the low-producing allele was greater in cases compared to controls (30% vs 20%, p = 6.2 × 10¯¹¹). SNPs in PTH, TGFB1, and VDR had nominal p values <0.05 but did not resist Bonferroni correction. In conclusion, this study suggests that subjects carrying specific polymorphisms in the IL10 and APOB genes are at higher risk for developing AS.
Type de document: Article de recherche
Date de publication: 1 novembre 2011
Date de la mise en libre accès: Accès restreint
Version du document: VoR
Lien permanent: http://hdl.handle.net/20.500.11794/7819
Ce document a été publié dans: The American journal of cardiology, Vol. 108 (9), 1305–1310 (2011)
https://doi.org/10.1016/j.amjcard.2011.06.050
Elsevier
Autre version disponible: 10.1016/j.amjcard.2011.06.050
21855833
Collection :Articles publiés dans des revues avec comité de lecture

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