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J Biomed Biotechnol. 2010;2010:543514. doi: 10.1155/2010/543514. Epub 2010 May 11.

The relationship between birthweight and longitudinal changes of blood pressure is modulated by beta-adrenergic receptor genes: the Bogalusa Heart Study.

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1
Center for Cardiovascular Health, Department of Epidemiology, Tulane University Health Sciences Center, New Orleans, LA 70112, USA.

Abstract

This study examines the genetic influence of beta-adrenergic receptor gene polymorphisms (beta(2)-AR Arg16Gly and beta(3)-AR Trp64Arg) on the relationship of birthweight to longitudinal changes of blood pressure (BP) from childhood to adulthood in 224 black and 515 white adults, aged 21-47 years, enrolled in the Bogalusa Heart Study. Blacks showed significantly lower birthweight and frequencies of beta(2)-AR Gly16 and beta(3)-AR Trp64 alleles and higher BP levels and age-related trends than whites. In multivariable regression analyses using race-adjusted BP and birthweight, low birthweight was associated with greater increase in age-related trend of systolic BP (standardized regression coefficient beta = -0.09, P = .002) and diastolic BP (beta = -0.07, P = .037) in the combined sample of blacks and whites, adjusting for the first BP measurement in childhood, sex, age, and gestational age. Adjustment for the current body mass index strengthened the birthweight-BP association. Importantly, the strength of the association, measured as regression coefficients, was modulated by the combination of beta(2)-AR and beta(3)-AR genotypes for systolic (P = .042 for interaction) and diastolic BP age-related trend (P = .039 for interaction), with blacks and whites showing a similar trend in the interaction. These findings indicate that the intrauterine programming of BP regulation later in life depends on beta-AR genotypes.

PMID:
20467565
PMCID:
PMC2868188
DOI:
10.1155/2010/543514
[Indexed for MEDLINE]
Free PMC Article
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