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Endothelial nitric oxide synthase (NOS3) polymorphisms in African Americans with heart failure: results from the A-HeFT trial.

Abstract：

BACKGROUND:Genetic heterogeneity at the endothelial nitric oxide synthase (NOS3) locus influences heart failure outcomes. The prevalence of NOS3 variants differs in black and white cohorts, but the impact of these differences is unknown. METHODS AND RESULTS:Subjects (n = 352) in the Genetic Risk Assessment of Heart Failure (GRAHF) substudy of the African-American Heart Failure Trial were genotyped for NOS3 polymorphisms: -786 T/C promoter, intron 4a/4b, and Glu298Asp and allele frequencies and compared with a white heart failure cohort. The effect of treatment with fixed-dose combination of isosorbide dinitrates and hydralazine (FDC I/H) on event-free survival and composite score (CS) of survival, hospitalization, and quality of life (QoL) was analyzed within genotype subsets. In GRAHF, NOS3 genotype frequencies differed from the white cohort (P < .001). The -786 T allele was associated with lower left ventricular ejection fraction (LVEF) (P = .01), whereas the intron 4a allele was linked to lower diastolic blood pressure and higher LVEF (P = .03). Only the Glu298Asp polymorphism influenced treatment outcome; therapy with FDC I/H improved CS (P = .046) and QoL (P = .03) in the Glu298Glu subset only. CONCLUSIONS:In black subjects with heart failure, NOS3 genotype influences blood pressure and left ventricular remodeling. The impact of genetic heterogeneity on treatment with FDC I/H requires further study.

journal_name

J Card Fail

journal_title

Journal of cardiac failure

authors

McNamara DM,Tam SW,Sabolinski ML,Tobelmann P,Janosko K,Venkitachalam L,Ofili E,Yancy C,Feldman AM,Ghali JK,Taylor AL,Cohn JN,Worcel M

doi

10.1016/j.cardfail.2008.10.028

subject

Has Abstract

pub_date

2009-04-01 00:00:00

pages

191-8

issue

3

eissn

1071-9164

issn

1532-8414

pii

S1071-9164(08)01052-X

journal_volume

15

pub_type

杂志文章,随机对照试验

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