Association of genetic variation with systolic and diastolic blood pressure among African Americans: the Candidate Gene Association Resource study.
Author(s)
Type
Journal Article
Abstract
The prevalence of hypertension in African Americans (AAs) is higher than in other US groups; yet, few have performed genome-wide association studies (GWASs) in AA. Among people of European descent, GWASs have identified genetic variants at 13 loci that are associated with blood pressure. It is unknown if these variants confer susceptibility in people of African ancestry. Here, we examined genome-wide and candidate gene associations with systolic blood pressure (SBP) and diastolic blood pressure (DBP) using the Candidate Gene Association Resource (CARe) consortium consisting of 8591 AAs. Genotypes included genome-wide single-nucleotide polymorphism (SNP) data utilizing the Affymetrix 6.0 array with imputation to 2.5 million HapMap SNPs and candidate gene SNP data utilizing a 50K cardiovascular gene-centric array (ITMAT-Broad-CARe [IBC] array). For Affymetrix data, the strongest signal for DBP was rs10474346 (P= 3.6 × 10(-8)) located near GPR98 and ARRDC3. For SBP, the strongest signal was rs2258119 in C21orf91 (P= 4.7 × 10(-8)). The top IBC association for SBP was rs2012318 (P= 6.4 × 10(-6)) near SLC25A42 and for DBP was rs2523586 (P= 1.3 × 10(-6)) near HLA-B. None of the top variants replicated in additional AA (n = 11 882) or European-American (n = 69 899) cohorts. We replicated previously reported European-American blood pressure SNPs in our AA samples (SH2B3, P= 0.009; TBX3-TBX5, P= 0.03; and CSK-ULK3, P= 0.0004). These genetic loci represent the best evidence of genetic influences on SBP and DBP in AAs to date. More broadly, this work supports that notion that blood pressure among AAs is a trait with genetic underpinnings but also with significant complexity.
Date Issued
2011-06-01
Date Acceptance
2011-02-28
Citation
Human Molecular Genetics, 2011, 20 (11), pp.2273-2284
ISSN
1460-2083
Publisher
Oxford University Press (OUP)
Start Page
2273
End Page
2284
Journal / Book Title
Human Molecular Genetics
Volume
20
Issue
11
Copyright Statement
© The Authors 2011. Published by Oxford University Press.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/
licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is
properly cited.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/
licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is
properly cited.
License URL
Sponsor
Medical Research Council (MRC)
Medical Research Council (MRC)
Identifier
PII: ddr092
Grant Number
G0801056B
G0801056/1
Subjects
Adult
African Americans
Aged
Blood Pressure
Cohort Studies
Diastole
European Continental Ancestry Group
Female
Genetic Loci
Genome-Wide Association Study
Genotype
Humans
Hypertension
Male
Middle Aged
Phenotype
Polymorphism, Single Nucleotide
Systole
Publication Status
Published