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. 2009:5:258.
doi: 10.1038/msb.2009.11. Epub 2009 Apr 7.

High heritability of metabolomic profiles in families burdened with premature cardiovascular disease

Affiliations

High heritability of metabolomic profiles in families burdened with premature cardiovascular disease

Svati H Shah et al. Mol Syst Biol. 2009.

Abstract

Integration of genetic and metabolic profiling holds promise for providing insight into human disease. Coronary artery disease (CAD) is strongly heritable, but the heritability of metabolomic profiles has not been evaluated in humans. We performed quantitative mass spectrometry-based metabolic profiling in 117 individuals within eight multiplex families from the GENECARD study of premature CAD. Heritabilities were calculated using variance components. We found high heritabilities for amino acids (arginine, ornithine, alanine, proline, leucine/isoleucine, valine, glutamate/glutamine, phenylalanine and glycine; h(2)=0.33-0.80, P=0.005-1.9 x 10(-16)), free fatty acids (arachidonic, palmitic, linoleic; h(2)=0.48-0.59, P=0.002-0.00005) and acylcarnitines (h(2)=0.23-0.79, P=0.05-0.0000002). Principal components analysis was used to identify metabolite clusters. Reflecting individual metabolites, several components were heritable, including components comprised of ketones, beta-hydroxybutyrate and C2-acylcarnitine (h(2)=0.61); short- and medium-chain acylcarnitines (h(2)=0.39); amino acids (h(2)=0.44); long-chain acylcarnitines (h(2)=0.39) and branched-chain amino acids (h(2)=0.27). We report a novel finding of high heritabilities of metabolites in premature CAD, establishing a possible genetic basis for these profiles. These results have implications for understanding CAD pathophysiology and genetics.

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Conflict of interest statement

The authors declare that they have no conflict of interest.

Figures

Figure 1
Figure 1
Heritabilities of conventional metabolites. Heritabilities of the conventional metabolites are displayed in graphical form. The Y-axis is the negative log10 of the P-value for the heritability estimate (X-axis). Error bars around heritability point estimates are in light gray.
Figure 2
Figure 2
Heritabilities of amino acids and free fatty acids. Heritabilities of amino acids and free fatty acids are displayed in graphical form. The Y-axis is the negative log10 of the P-value for the heritability estimate (X-axis). Error bars around heritability point estimates are in light gray.
Figure 3
Figure 3
Heritabilities of acylcarnitines. Heritabilities of the acylcarnitines are displayed in graphical form. The Y-axis is the negative log10 of the P-value for the heritability estimate (X-axis). Error bars around heritability point estimates are in light gray.

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