Coronary artery disease (CAD) is a complex disease with a strong genetic component. The progress of genotyping techniques on genomic research has opened a new era for research on its complex genetic architecture. To enhance the current understanding of CAD genetics, I collected individual-level genotype data of nine Caucasian cohorts of CAD case-control studies including more than 27,000 individuals. Genome-wide association studies were performed and contributed to meta-analyses by the CARDIoGRAMplusC4D consortium, which identified ten novel CAD susceptibility loci in the autosomal genome, and revealed no association of X-chromosomal loci and CAD. Subsequently, allelic heterogeneity was examined and confirmed at the identified CAD susceptibility loci based on intra-locus polygenic score (PGS) analysis. Besides, the potential pleiotropic effect of the genetic susceptible loci of height and rheumatoid arthritis (RA) on CAD was investigated based on multi-locus PGS analyses, which helped to support the notion that height and CAD have a shared genetic background, and that genetic factors underlying RA carry a low likelihood to affect CAD risk. Furthermore, epistasis, or gene-gene interaction, was investigated for all variants within the CAD susceptibility regions. One novel statistical trans-epistasis SNP-pair in association with risk of CAD was identified and a biological interpretation underlying this epistasis was postulated. Collectively, all these studies, approaches, and results have improved our understanding of the genetic etiology of CAD from several perspectives.
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Coronary artery disease (CAD) is a complex disease with a strong genetic component. The progress of genotyping techniques on genomic research has opened a new era for research on its complex genetic architecture. To enhance the current understanding of CAD genetics, I collected individual-level genotype data of nine Caucasian cohorts of CAD case-control studies including more than 27,000 individuals. Genome-wide association studies were performed and contributed to meta-analyses by the CARDIoGR...
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