@article{04493a54d532459c97cab04c3958a868,
title = "Novel Loci Associated With PR Interval in a Genome-Wide Association Study of 10 African American Cohorts",
abstract = "Background-The PR interval, as measured by the resting, standard 12-lead ECG, reflects the duration of atrial/atrioventricular nodal depolarization. Substantial evidence exists for a genetic contribution to PR, including genome-wide association studies that have identified common genetic variants at 9 loci influencing PR in populations of European and Asian descent. However, few studies have examined loci associated with PR in African Americans. Methods and Results-We present results from the largest genome-wide association study to date of PR in 13 415 adults of African descent from 10 cohorts. We tested for association between PR (ms) and approximate to 2.8 million genotyped and imputed single-nucleotide polymorphisms. Imputation was performed using HapMap 2 YRI and CEU panels. Study-specific results, adjusted for global ancestry and clinical correlates of PR, were meta-analyzed using the inverse variance method. Variation in genome-wide test statistic distributions was noted within studies (lambda range: 0.9-1.1), although not after genomic control correction was applied to the overall meta-analysis (lambda: 1.008). In addition to generalizing previously reported associations with MEIS1, SCN5A, ARHGAP24, CAV1, and TBX5 to African American populations at the genome-wide significance level (P<5.0x10(-8)), we also identified a novel locus: ITGA9, located in a region previously implicated in SCN5A expression. The 3p21 region harboring SCN5A also contained 2 additional independent secondary signals influencing PR (P<5.0x10-8). Conclusions-This study demonstrates the ability to map novel loci in African Americans as well as the generalizability of loci associated with PR across populations of African, European, and Asian descent. (Circ Cardiovasc Genet. 2012;5:639-646.)",
keywords = "electrocardiography, epidemiology, genome-wide association study, PR, interval, single-nucleotide polymorphism genetics",
author = "Butler, {Anne M.} and Xiaoyan Yin and Evans, {Daniel S.} and Nalls, {Michael A.} and Smith, {Erin N.} and Toshiko Tanaka and Guo Li and Buxbaum, {Sarah G.} and Whitsel, {Eric A.} and Alvaro Alonso and Arking, {Dan E.} and Benjamin, {Emelia J.} and Berenson, {Gerald S.} and Bis, {Josh C.} and Wei Chen and Rajat Deo and Ellinor, {Patrick T.} and Heckbert, {Susan R.} and Gerardo Heiss and Wen-Chi Hsueh and Keating, {Brendan J.} and Kerr, {Kathleen F.} and Yun Li and Limacher, {Marian C.} and Yongmei Liu and Lubitz, {Steven A.} and Marciante, {Kristin D.} and Reena Mehra and Meng, {Yan A.} and Newman, {Anne B.} and Christopher Newton-Cheh and North, {Kari E.} and Palmer, {Cameron D.} and Psaty, {Bruce M.} and Quibrera, {P. Miguel} and Susan Redline and Reiner, {Alex P.} and Rotter, {Jerome I.} and Schnabel, {Renate B.} and Schork, {Nicholas J.} and Singleton, {Andrew B.} and Gustav Smith and Soliman, {Elsayed Z.} and Srinivasan, {Sathanur R.} and Zhu-ming Zhang and Zonderman, {Alan B.} and Luigi Ferrucci and Murray, {Sarah S.} and Evans, {Michele K.} and Nona Sotoodehnia and Magnani, {Jared W.} and Avery, {Christy L.}",
year = "2012",
doi = "10.1161/CIRCGENETICS.112.963991",
language = "English",
volume = "5",
pages = "639--646",
journal = "Circulation: Cardiovascular Genetics",
issn = "1942-325X",
publisher = "American Heart Association",
number = "6",
}