Abstract:
:The genetic architectures of common, complex diseases are largely uncharacterized. We modeled the genetic architecture underlying genome-wide association study (GWAS) data for rheumatoid arthritis and developed a new method using polygenic risk-score analyses to infer the total liability-scale variance explained by associated GWAS SNPs. Using this method, we estimated that, together, thousands of SNPs from rheumatoid arthritis GWAS explain an additional 20% of disease risk (excluding known associated loci). We further tested this method on datasets for three additional diseases and obtained comparable estimates for celiac disease (43% excluding the major histocompatibility complex), myocardial infarction and coronary artery disease (48%) and type 2 diabetes (49%). Our results are consistent with simulated genetic models in which hundreds of associated loci harbor common causal variants and a smaller number of loci harbor multiple rare causal variants. These analyses suggest that GWAS will continue to be highly productive for the discovery of additional susceptibility loci for common diseases.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Stahl EA,Wegmann D,Trynka G,Gutierrez-Achury J,Do R,Voight BF,Kraft P,Chen R,Kallberg HJ,Kurreeman FA,Diabetes Genetics Replication and Meta-analysis Consortium.,Myocardial Infarction Genetics Consortium.,Kathiresan S,Wijmengadoi
10.1038/ng.2232subject
Has Abstractpub_date
2012-03-25 00:00:00pages
483-9issue
5eissn
1061-4036issn
1546-1718pii
ng.2232journal_volume
44pub_type
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