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Titel: Common genetic loci influencing plasma homocysteine concentrations and their effect on risk of coronary artery disease.
Datum: 21-08-13
Zusammenfassung:

BACKGROUND

The strong observational association between total homocysteine (tHcy) concentrations and risk of coronary artery disease (CAD) and the null associations in the homocysteine-lowering trials have prompted the need to identify genetic variants associated with homocysteine concentrations and risk of CAD.

OBJECTIVE

We tested whether common genetic polymorphisms associated with variation in tHcy are also associated with CAD.

DESIGN

We conducted a meta-analysis of genome-wide association studies (GWAS) on tHcy concentrations in 44,147 individuals of European descent. Polymorphisms associated with tHcy (P < 10(⁻⁸) were tested for association with CAD in 31,400 cases and 92,927 controls.

RESULTS

Common variants at 13 loci, explaining 5.9% of the variation in tHcy, were associated with tHcy concentrations, including 6 novel loci in or near MMACHC (2.1 × 10⁻⁹), SLC17A3 (1.0 × 10⁻⁸), GTPB10 (1.7 × 10⁻⁸), CUBN (7.5 × 10⁻¹⁰), HNF1A (1.2 × 10⁻¹²)), and FUT2 (6.6 × 10⁻⁹), and variants previously reported at or near the MTHFR, MTR, CPS1, MUT, NOX4, DPEP1, and CBS genes. Individuals within the highest 10% of the genotype risk score (GRS) had 3-μmol/L higher mean tHcy concentrations than did those within the lowest 10% of the GRS (P = 1 × 10⁻³⁶). The GRS was not associated with risk of CAD (OR: 1.01; 95% CI: 0.98, 1.04; P = 0.49).

CONCLUSIONS

We identified several novel loci that influence plasma tHcy concentrations. Overall, common genetic variants that influence plasma tHcy concentrations are not associated with risk of CAD in white populations, which further refutes the causal relevance of moderately elevated tHcy concentrations and tHcy-related pathways for CAD.

Autoren: van Meurs Joyce B J, Pare Guillaume, Schwartz Stephen M, Hazra Aditi, Tanaka Toshiko, Vermeulen Sita H, Cotlarciuc Ioana, Yuan Xin, Mälarstig Anders, Bandinelli Stefania, Bis Joshua C, Blom Henk, Brown Morris J, Chen Constance, Chen Yii-Der, Clarke Robert J, Dehghan Abbas, Erdmann Jeanette, Ferrucci Luigi, Hamsten Anders, Hofman Albert, Hunter David J, Goel Anuj, Johnson Andrew D, Kathiresan Sekar, Kampman Ellen, Kiel Douglas P, Kiemeney Lambertus A L M, Chambers John C, Kraft Peter, Lindemans Jan, McKnight Barbara, Nelson Christopher P, O'Donnell Christopher J, Psaty Bruce M, Ridker Paul M, Rivadeneira Fernando, Rose Lynda M, Seedorf Udo, Siscovick David S, Schunkert Heribert, Selhub Jacob, Ueland Per M, Vollenweider Peter, Waeber Gérard, Waterworth Dawn M, Watkins Hugh, Witteman Jacqueline C M, den Heijer Martin, Jacques Paul, Uitterlinden Andre G, Kooner Jaspal S, Rader Dan J, Reilly Muredach P, Mooser Vincent, Chasman Daniel I, Samani Nilesh J, Ahmadi Kourosh R
Publikation: The American journal of clinical nutrition 2013 Sep;98(3):668-76
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