title: Angiotensin-converting enzyme gene 2350 G/A polymorphism is associated with left ventricular hypertrophy but not essential hypertension.
abstract: The angiotensin-converting enzyme (ACE) gene (ACE) is one of the most studied candidate genes related to essential hypertension (EH) and left ventricular hypertrophy (LVH). ACE rs4343 synonymous coding polymorphism (2350 G/A) is known among the polymorphisms of this gene to have the most significant effect on plasma ACE concentrations. The aim of the present study was to investigate the association of this polymorphism with EH and LVH in 440 subjects (246 EH patients and 194 controls) from a Chinese Han population. In this study, 2350 G/A genotypes were identified by polymerase chain reaction and restriction digestion in all study participants, and left ventricular mass was assessed by 2-mode echocardiography in 178 untreated EH patients. There was no significant difference in either genotype distribution (p=0.3659) or allele frequency (p=0.1453) between EH and control groups. In addition, the 2350 G/A polymorphism had no effect on blood pressure in either controls or untreated EH patients. The distribution of genotypes differed significantly when patients with LVH were examined, i.e., 14.71% GG, 54.41% GA, and 30.88% AA patients had this complication, and 36.36% GG, 42.73% GA, and 20.91% AA patients did not (p=0.0070). The LVH patients had a higher A allele frequency (58.09%) than patients without LVH (42.27%) (p=0.0037). Logistic regression analysis revealed that the association between the A allele and LVH was independent of age, blood pressure, and body mass index. The relative risk of LVH in patients bearing the A allele (GA+AA group) compared with that of GG hypertensive patients was 3.31 (95% confidence interval [CI]: 1.43 to 7.68). These findings suggest an association between LVH and the 2350A allele in hypertensive patients.
authors: Department of Cardiology, Affiliated Hospital of Nantong University, P.R. China.
authors: Min
authors: M
authors: Pan
authors: Jian-Hua
authors: JH
authors: Zhu
authors: Zhi-Hua
authors: ZH
authors: Liu
authors: Wen-Ping
authors: WP
authors: Jiang
authors: Zhi-Chu
authors: ZC
authors: Cui
authors: Xiao-Hong
authors: XH
authors: Yu
authors: Hong-Mei
authors: HM
authors: Li
authors: Xiang-Jun
authors: XJ
authors: Yang
mesh_terms: D000225:Adenine; D000328:Adult; D044466:Asian People / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006147:Guanine; D006801:Humans; D006973:Hypertension / Q000235:genetics*; D017379:Hypertrophy, Left Ventricular / Q000235:genetics*; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D007703:Peptidyl-Dipeptidase A / Q000235:genetics*; D011110:Polymorphism, Genetic; D012306:Risk
chemical_list: D006147:Guanine; D007703:Peptidyl-Dipeptidase A; D000225:Adenine