Savva J, Alfakih K, Galloway SL, Hall AS, West RM, Ball SG, Balmforth AJ, Maqbool A. The α(2C)-Del322-325 adrenoceptor polymorphism and the occurrence of left ventricular hypertrophy in hypertensives.
Blood Press 2011;
21:116-21. [PMID:
22040172 DOI:
10.3109/08037051.2011.622988]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES
Sympathetic activation has a role in the development of left ventricular hypertrophy (LVH). The presynaptic α(2C)-adrenoceptor inhibits the release of norepinephrine from sympathetic nerve terminals in the heart. A deletion polymorphism in the α(2C)-adrenoceptor (α(2C)Del322-325) generates a hypofunctional α(2C)-adrenoceptor, which may result in chronic adrenergic signalling. This study aimed to investigate whether the α(2C)Del322-325 polymorphism was associated with an increased prevalence of LVH in patients with systemic hypertension.
METHODS
Left ventricular mass was measured in 205 patients with systemic hypertension and 60 normal volunteers using a 1.5-T Philips MRI system. Genotyping was performed using a restriction fragment length polymorphism assay.
RESULTS
No significant difference was observed between the distribution of the α(2C)Del322-325 genotypes in hypertensive patients with LVH compared with those without LVH. Adjusting for confounding variables the odds ratio (OR) of being ins/del for the α(2C)Del322-325 and having LVH was 0.49 (95% CI 0.14-1.69, p = 0.256).
CONCLUSIONS
These observations suggest that there is little evidence for an association between α(2C)Del322-325 polymorphism and an increased prevalence of LVH in patients with systemic hypertension.
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