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Using a case-control design, we assessed the association between single nucleotide polymorphisms of CYP3A4 gene rs4646437 polymorphism and the risk of hypertension in Chinese population. We recruited 450 hypertension patients from The First Clinical College, Henan University of Chinese Medicine between June 2017 and May 2018. There was a significant difference in genotype distribution between case group and control group ( χ 2  =18.169, P =0.000). The minor A allele was significantly higher in the case group than that in the control group (31.0 vs 24.8%, P =0.000, odds ratio [OR] =1.36, 95% confidence interval [95% CI]: 1.12-1.66). Significant differences were also observed in other gene models: the GA/AA genotype did not increase the risk of hypertension compared with GG genotype ( OR =1.16, 95% CI: 0.90-1.49, P =0.259). Compared with GG/GA genotype, the AA genotype also increased the risk of hypertension ( OR =2.34, 95% CI: 1.56-3.50, P =0.000). For additive model, the AA genotype was significantly associated with GG genotype ( OR =2.25, 95% CI: 1.49-3.42, P =0.000). The same results were found for AA vs GA ( OR =2.50, 95% CI: 1.60-3.89, P =0.000). For the allele genotype, the A allele frequency was significantly higher in the case group than that in the control group (31.0 vs 24.8%, P =0.002). The A allele of CYP3A4 rs4646437 was associated with an increased risk for hypertension ( OR =1.36, 95% CI: 1.12-1.66, P =0.002). Our results revealed a possible genetic association between CYP3A4 gene rs4646437 and hypertension, and the AA genotype of rs4646437 increased the risk of hypertension in Chinese Han population, and this effect could be confirmed by multivariable analyses.

Association between CYP3A4 gene rs4646437 polymorphism and the risk of hypertension in Chinese population: a case–control study