Genome-wide association study of platelet aggregation in African Americans

BMC Genetics

Paul F. Bray⁵  Bhoom Suktitipat⁴  Rasika Mathias³  Chad Shaw¹  Suzanne M. Leal¹  Lisa R. Yanek³  Nauder Faraday²  Diane M. Becker³  Lewis C. Becker³  Rehan Qayyum⁶ 

[1]Molecular and Human Genetics, Baylor College of Medicine, Houston 77030, Texas, USA

[2]Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore 21287, Maryland, USA

[3]The GeneSTAR Research Center, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore 21287, Maryland, USA

[4]Integrative Computational BioScience Center, Department of Biochemistry, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand

[5]Department of Medicine, Thomas Jefferson University, Jefferson Medical College, Philadelphia 19107, Pennsylvania, USA

[6]Department of Medicine, University of Tennessee College of Medicine, Chattanooga 37403, Tennessee, USA

关键词: Genome-wide association study;    BMPR1A;    PEAR1;    Platelet aggregation;   

Others  :  1213724
DOI  :  10.1186/s12863-015-0217-9

 received in 2015-02-05, accepted in 2015-05-13,  发布年份 2015

【 摘 要 】

Background

We have previously shown that platelet aggregation has higher heritability in African Americans than European Americans. However, a genome-wide association study (GWAS) of platelet aggregation in African Americans has not been reported. We measured platelet aggregation in response to arachidonic acid, ADP, collagen, or epinephrine by optical aggregometry. The discovery cohort was 825 African Americans from the GeneSTAR study. Two replication cohorts were used: 119 African Americans from the Platelet Genes and Physiology Study and 1221 European Americans from GeneSTAR. Genotyping was conducted with Illumina 1 M arrays. For each cohort, age- and sex-adjusted linear mixed models were used to test for association between each SNP and each phenotype under an additive model.

Results

Six SNPs were significantly associated with platelet aggregation (P < 5×10⁻⁸) in the discovery sample. Of these, three SNPs in three different loci were confirmed: 1) rs12041331, in PEAR1 (platelet endothelial aggregation receptor 1), replicated in both African and European Americans for collagen- and epinephrine-induced aggregation, and in European Americans for ADP-induced aggregation; 2) rs11202221, in BMPR1A (bone morphogenetic protein receptor type1A), replicated in African Americans for ADP-induced aggregation; and 3) rs6566765 replicated in European Americans for ADP-induced aggregation. The rs11202221 and rs6566765 associations with agonist-induced platelet aggregation are novel.

Conclusions

In this first GWAS of agonist-induced platelet aggregation in African Americans, we discovered and replicated, novel associations of two variants with ADP-induced aggregation, and confirmed the association of a PEAR1 variant with multi-agonist-induced aggregation. Further study of these genes may provide novel insights into platelet biology.

【 授权许可】

   
2015 Qayyum et al.; licensee BioMed Central.

【 图 表 】

Fig. 1.

Fig. 2.

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