Do allelic variants in alpha2A and alpha2C adrenergic receptors predispose to hypertension in blacks?

Hypertension
Jia-Ling LiRonald G Victor

Abstract

Sequence variations in the human alpha2 adrenergic receptor genes (ADRA2A and ADRA2C) have been implicated as a cause of hypertension in blacks. Although certain alleles are selectively enriched in blacks, their association with hypertension is based on small convenience samples and has not been evaluated in larger populations. From a stratified random population sample of 3398 individuals (52% blacks), we obtained DNA samples together with an in-home health interview, 10 in-home measurements of blood pressure, and cardiac MRI. We tested for associations among hypertension, untreated blood pressure, and parameters of hypertensive heart disease with 2 alleles, a DraI restriction fragment length polymorphism in the ADRA2A gene and a deletion of residues 322 to 325 in the ADRA2C gene. Although both alleles were selectively enriched in this black population, we found no association of either allele with hypertension, untreated blood pressure, or any of the cardiac function parameters. In a logistic model that controlled for age, body mass index, diabetes, and smoking, the adjusted odds ratio (OR) for hypertension was 1.0 (95% CI, 0.8 to 1.2), and 1.0 (95% CI, 0.9 to 1.2) for ADRA2A and ADRA2C variant alleles. In subjects not receiv...Continue Reading

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Citations

May 16, 2009·Clinical Autonomic Research : Official Journal of the Clinical Autonomic Research Society·Eitan A FriedmanDaniel Kurnik
Apr 17, 2008·Hypertension·Pei-an Betty Shih, Daniel T O'Connor
Jun 16, 2012·American Journal of Public Health·Amy L NonConnie J Mulligan
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