Clear detection of ADIPOQ locus as the major gene for plasma adiponectin: Results of genome-wide association analyses including 4659 European individuals

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• 作者：Iris M. Heid ; Peter Henneman ; Andrew Hicks ; Stefan Coassin ; Thomas Winkler ; Yurii S. Aulchenko ; Christian Fuchsberger ; Kijoung Song ; Marie-France Hivert ; Dawn M. Waterworth ; Nicholas J. Timpson ; J. Br
• 关键词：Adiponectin ; Genome-wide association study ; Polymorphism ; Cardiovascular disease ; Metabolic syndrome
• 刊名：Atherosclerosis
• 出版年：2010
• 出版时间：February 2010
• 年：2010
• 卷：208
• 期：2
• 页码：412-420
• 全文大小：1220 K

文摘

Objective

Plasma adiponectin is strongly associated with various components of metabolic syndrome, type 2 diabetes and cardiovascular outcomes. Concentrations are highly heritable and differ between men and women. We therefore aimed to investigate the genetics of plasma adiponectin in men and women.

Methods

We combined genome-wide association scans of three population-based studies including 4659 persons. For the replication stage in 13795 subjects, we selected the 20 top signals of the combined analysis, as well as the 10 top signals with p-values less than 1.0 × 10⁻⁴ for each the men- and the women-specific analyses. We further selected 73 SNPs that were consistently associated with metabolic syndrome parameters in previous genome-wide association studies to check for their association with plasma adiponectin.

Results

The ADIPOQ locus showed genome-wide significant p-values in the combined (p = 4.3 × 10⁻²⁴) as well as in both women- and men-specific analyses (p = 8.7 × 10⁻¹⁷ and p = 2.5 × 10⁻¹¹, respectively). None of the other 39 top signal SNPs showed evidence for association in the replication analysis. None of 73 SNPs from metabolic syndrome loci exhibited association with plasma adiponectin (p > 0.01).

Conclusions

We demonstrated the ADIPOQ gene as the only major gene for plasma adiponectin, which explains 6.7 % of the phenotypic variance. We further found that neither this gene nor any of the metabolic syndrome loci explained the sex differences observed for plasma adiponectin. Larger studies are needed to identify more moderate genetic determinants of plasma adiponectin.