Analysis of candidate genes and hypertension in African American adults.


Journal Article

OBJECTIVE: We investigated the associations between hypertension status and the genotypes of four single nucleotide polymorphism (SNP) sites in four hypertension-related genes (Angiotensinogen [AGT], Angiotensin I Converting Enzyme [ACE], Angiotensinogen II receptor, subtype 1 [AGTR1], and Alpha 1-Antichymotrypsin [ACT or SERPINA3]), in an African American sample. METHODS: DNA from 628 participants of the Carolina African American Twin Study of Aging project, a population-based study of African American adult twins, was genotyped using SNPs shown to be associated with hypertension in other studies. RESULTS: The ACE SNP (ACE4 or A-240T) was associated with hypertension (P = .047 in a generalized estimating equations alternating logistics regression model that included age, body mass index, sex, and education. The analysis indicated a protective effect of the TT genotype (odds ratio [OR] 1.59, 95% confidence interval [CI] 1.03-2.48, P = .04) and of the AT genotype (OR 1.91, 95% CI 1.01-3.62, P = .047) compared with the AA genotype. DISCUSSION: These results extend previous findings of associations of various polymorphisms of ACE to hypertension and support the association of hypertension to the A allele of ACE4. The potential for this polymorphism to alter expression by its position in the gene's promoter region suggests that future studies of altered ACE protein activity are warranted.

Full Text

Cited Authors

  • Whitfield, KE; Yao, X; Boomer, KB; Vogler, GP; Hayward, MD; Vandenbergh, DJ

Published Date

  • January 2009

Published In

Volume / Issue

  • 19 / 1

Start / End Page

  • 18 - 22

PubMed ID

  • 19341158

Pubmed Central ID

  • 19341158

Electronic International Standard Serial Number (EISSN)

  • 1945-0826

International Standard Serial Number (ISSN)

  • 1049-510X


  • eng