Population-Matched Transcriptome Prediction Increases TWAS Discovery and Replication Rate.
Population-Matched Transcriptome Prediction Increases TWAS Discovery and Replication Rate.
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DOI:
10.1016/j.isci.2020.101850
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发表时间:
2020-12-18
期刊:
影响因子:
5.8
通讯作者:
Wheeler HE
中科院分区:
文献类型:
--
作者:
Geoffroy E;Gregga I;Wheeler HE
Most genome-wide association studies (GWAS) and transcriptome-wide association studies (TWAS) focus on European populations; however, these results cannot always be accurately applied to non-European populations due to genetic architecture differences. Using GWAS summary statistics in the Population Architecture using Genomics and Epidemiology study, which comprises ∼50,000 Hispanic/Latinos, African Americans, Asians, Native Hawaiians, and Native Americans, we perform TWAS to determine gene-trait associations. We compared results using three transcriptome prediction models derived from Multi-Ethnic Study of Atherosclerosis populations: the African American and Hispanic/Latino (AFHI) model, the European (EUR) model, and the African American, Hispanic/Latino, and European (ALL) model. We identified 240 unique significant trait-associated genes. We found more significant, colocalized genes that replicate in larger cohorts when applying the AFHI model than the EUR or ALL model. Thus, TWAS with population-matched transcriptome models have more power for discovery and replication, demonstrating the need for more transcriptome studies in diverse populations. TWAS mechanistically extends GWAS findings in diverse populations Population-matched transcriptome models detect more replicable associations Colocalization shows GWAS variants likely act through gene expression regulation More GWAS and transcriptome modeling in diverse populations are needed Population; Genetics; Genomics; Human Genetics
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