ADRB2 gene variants, dual-energy x-ray absorptiometry body composition, and hypertension in Tobago men of African descent.

ADRB2 gene variants, dual-energy x-ray absorptiometry body composition, and hypertension in Tobago men of African descent.
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非洲裔多巴哥男性的 ADRB2 基因变异、双能 X 射线吸收测量身体成分和高血压。

DOI:
10.1016/j.metabol.2010.07.004
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发表时间:
2011
期刊:
Metabolism: clinical and experimental
影响因子:
--
通讯作者:
Weissfeld,JoelL
Weissfeld,JoelL
中科院分区:
--
文献类型:
--
作者:
Beason,TraceySamantha;Bunker,ClareannH;Zmuda,JosephM;Wilson,JohnW;Patrick,AlanL;Wheeler,VictorW;Weissfeld,JoelL

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Classic tissue effects of β2-adrenergic receptor activation include skeletal muscle glycogenolysis and vascular smooth muscle relaxation, factors relevant to obesity and hypertension, respectively. In a population-based study, we examined 2 common amino acid substitutions in the β2-adrenergic receptor gene (ADRB2) in relation to body composition and blood pressure. A cross-sectional analysis of 1893 African-descent men living in Tobago and participating in a prostate cancer screening study was performed. Body mass index, waist circumference, blood pressure, dual-energy x-ray absorptiometry body composition, and ADRB2 (Arg16Gly; Gln27Glu) genotype were determined. Twenty-six percent were obese (body mass index ≥30 kg/m2), and 50% were hypertensive. ADRB2 Arg16Gly and Gln27Glu alleles were in linkage disequilibrium (D′ = 0.96, r2= 0.15). ADRB2 16Gly-containing and 27Glu-containing genotypes were equally frequent in low, medium, and high tertiles of percentage of body fat mass (16Gly-containing genotypes: 73.4%, 74.4%, and 74.5%, Ptrend= .66; 27Glu-containing genotypes: 27.6%, 23.8%, and 25.4%, Ptrend= .39) and in normal blood pressure, prehypertensive, and hypertensive men (16Gly-containing genotypes: 73.4%, 72.8%, and 74.4%, Ptrend= .61; 27Glu-containing genotypes: 25.6%, 24.1%, and 26.7%, Ptrend= .50). In a high-obesity and high–hypertension risk population with ancestry in common with African Americans, genetic variation defined by 2 common ADRB2 amino acid substitutions was not associated with body composition or hypertension.
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