Yunfeng Huang1, Qin Hui1, Marta Gwinn1, Yi-Juan Hu2, Arshed A Quyyumi3, Viola Vaccarino1, Yan V Sun1,4. 1. Department of Epidemiology (Y.H., Q.H., M.G., V.V., Y.V.S.), School of Medicine, Emory University, Atlanta, GA. 2. Department of Biostatistics and Bioinformatics, Rollins School of Public Health (Y.-J.H.), School of Medicine, Emory University, Atlanta, GA. 3. Division of Cardiology (A.A.Q.), School of Medicine, Emory University, Atlanta, GA. 4. Department of Biomedical Informatics (Y.V.S.), School of Medicine, Emory University, Atlanta, GA.
Abstract
BACKGROUND: The genomic structure that contributes to the risk of coronary artery disease (CAD) can be evaluated as a risk score of multiple variants. However, sex differences have not been fully examined in applications of genetic risk score (GRS) of CAD. METHODS: Using data from the UK Biobank, we constructed a CAD-GRS based on all known loci, 3 mediating trait-based (blood pressure, lipids, and body mass index) subscores, and a genome-wide polygenic risk score based on 1.1 million variants. The differences in genetic associations with prevalent and incident CAD between men and women were investigated among 317 509 unrelated individuals of the European ancestry. We also assessed interactions with sex for 161 individual loci included in the comprehensive GRS. RESULTS: For both prevalent and incident CAD, the associations of comprehensive and genome-wide GRSs were stronger among men than women. Using a score of 161 loci, we observed a 2.4× higher risk for incident CAD comparing men with high genetic risk to men with low genetic risk but an 80% greater risk comparing women with high genetic risk to women with low genetic risk (interaction P=0.002). Of the 3 subscores, the blood pressure-associated subscore exhibited sex differences (interaction P=0.0004 per SD increase in subscore). Analysis of individual variants identified a novel gene-sex interaction at locus 21q22.11. CONCLUSIONS: Sexual differences in genetic predisposition should be considered in future studies of CAD, and GRSs should not be assumed to perform equally well in men and women.
BACKGROUND: The genomic structure that contributes to the risk of coronary artery disease (CAD) can be evaluated as a risk score of multiple variants. However, sex differences have not been fully examined in applications of genetic risk score (GRS) of CAD. METHODS: Using data from the UK Biobank, we constructed a CAD-GRS based on all known loci, 3 mediating trait-based (blood pressure, lipids, and body mass index) subscores, and a genome-wide polygenic risk score based on 1.1 million variants. The differences in genetic associations with prevalent and incident CAD between men and women were investigated among 317 509 unrelated individuals of the European ancestry. We also assessed interactions with sex for 161 individual loci included in the comprehensive GRS. RESULTS: For both prevalent and incident CAD, the associations of comprehensive and genome-wide GRSs were stronger among men than women. Using a score of 161 loci, we observed a 2.4× higher risk for incident CAD comparing men with high genetic risk to men with low genetic risk but an 80% greater risk comparing women with high genetic risk to women with low genetic risk (interaction P=0.002). Of the 3 subscores, the blood pressure-associated subscore exhibited sex differences (interaction P=0.0004 per SD increase in subscore). Analysis of individual variants identified a novel gene-sex interaction at locus 21q22.11. CONCLUSIONS: Sexual differences in genetic predisposition should be considered in future studies of CAD, and GRSs should not be assumed to perform equally well in men and women.
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