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24 May 2017 : Laboratory Research  

Association of CYP17A1 Genetic Polymorphisms and Susceptibility to Essential Hypertension in the Southwest Han Chinese Population

Qian Li1ACEFG, Tangxin Gao1BCD, Yuncang Yuan1BCD, Yanrui Wu2BCG, Qionglin Huang1CE, Fei Xie1BC, Pengzhan Ran1AD, Lijuan Sun1C, Chunjie Xiao1AEFG*

DOI: 10.12659/MSM.902109

Med Sci Monit 2017; 23:2488-2499

Abstract

BACKGROUND: The CYP17A1 gene encodes for cytochrome P450 enzyme CYP17A1, which is involved with the steroidogenic pathway including mineralocorticoids. The CYP17A1 polymorphisms might affect enzyme activity, then leading to a state of mineralocorticoid 11-deoxycorticosterone excess characterized by hypertension, suppressed plasma renin activity, and low aldosterone concentrations. The aim of this study was to investigate the contribution of CYP17A1 polymorphisms in inducing the susceptibility to essential hypertension among the Southwest Han Chinese population.

MATERIAL AND METHODS: Eight single nucleotide polymorphisms of CYP17A1 were genotyped in a case-control study for samples by polymerase chain reaction-restriction fragment length polymorphism analysis.

RESULTS: The polymorphisms rs11191548 and rs4919687 were significantly associated with hypertension risk, which was confirmed by systolic and diastolic blood pressure distribution analyses between different genotype groups, and these two polymorphisms were found in linkage disequilibrium. The rs4919687 polymorphism was estimated to cause the destruction of exonic splicing silencer (ESR and Motif 3) sites and to transform the transcription factor AREB6 binding site, respectively, in the bioinformatics analyses. The haplotypes rs4919686A-rs3740397G -rs4919687C-rs743572C-rs11191548C and rs4919686A-rs3740397G-rs4919687T-rs743572C- rs11191548T were found to be susceptible to essential hypertension.

CONCLUSIONS: Our findings suggest that the CYP17A1 polymorphisms could be a genetic risk factor for essential hypertension among the Yunnan Han Chinese population, which would have implications for the treatment of this complex disorder.

Keywords: Genetic Association Studies, Genetics, Population, Hypertension, Polymorphism, Single Nucleotide

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750