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Association of HSD3B1 and HSD3B2 gene polymorphisms with essential hypertension, aldosterone level, and left
Masanori Shimodaira1, Tomohiro Nakayama, Naoyuki Sato
1Division of Laboratory Medicine, Department of Pathology of Microbiology, Nihon University School of Medicine, Itabashi-ku, Tokyo, Japan.
Insights
Genetic variations in the HSD3B1 gene, specifically rs6203 and rs1047303, are linked to essential hypertension (EH). These HSD3B1 gene polymorphisms also correlate with blood pressure and aldosterone levels in individuals with EH.
Area of Science:
- Genetics
- Endocrinology
- Cardiovascular Disease
Background:
- HSD3B1 and HSD3B2 enzymes are vital for synthesizing hormonal steroids, including aldosterone.
- Variations in HSD3B genes may impact blood pressure by altering aldosterone levels.
Purpose of the Study:
- To investigate the association between HSD3B gene variations and essential hypertension (EH).
- To explore the relationship between HSD3B gene polymorphisms, aldosterone levels, and left ventricular hypertrophy (LVH).
Main Methods:
- A case-control study involving 275 EH patients and 286 controls.
- Genotyping of HSD3B1 (rs3765945, rs3088283, rs6203, rs1047303) and HSD3B2 (rs2854964, rs1819698) SNPs.
- Analysis of aldosterone levels and LVH in subsets of the study population.
Main Results:
- Significant association found for rs6203 (recessive model) in total and male EH groups.
- The T-C haplotype (rs3088283-rs1047303) was more frequent in EH patients.
- Subjects with the T-C haplotype exhibited higher systolic BP, diastolic BP, and aldosterone levels.
Conclusions:
- rs6203 and rs1047303 within the HSD3B1 gene serve as valuable genetic markers for EH.
- HSD3B1 gene polymorphisms are associated with blood pressure and aldosterone levels.
Background:
HSD3B1 and HSD3B2 are crucial enzymes for the synthesis of hormonal steroids, including aldosterone. Therefore, HSD3B gene variations could possibly influence blood pressure (BP) by affecting the aldosterone level.
Methods:
We performed a haplotype- and diplotype-based case-control study to investigate the association between the HSD3B gene variations and essential hypertension (EH), aldosterone level, and left ventricular hypertrophy (LVH). A total of 275 EH patients and 286 controls were genotyped for four SNPs of the HSD3B1 gene (rs3765945, rs3088283, rs6203, and rs1047303) and for two SNPs of the HSD3B2 gene (rs2854964 and rs1819698). Aldosterone and LVH were investigated in 240 and 110 subjects respectively.
Results:
Significant differences were noted for the total and the male subject groups for the recessive model (CC versus TC+TT) of rs6203 between the controls and EH patients (P=0.030 and P=0.008 respectively). The frequency of the T-C haplotype established by rs3088283-rs1047303 was significantly higher for EH patients compared with the controls (P=0.014). Even though the polymorphism of HSB3B1 was not associated with LVH, the diplotype established by rs3088283-rs1047303 in the total subject group, along with the systolic BP, diastolic BP, and aldosterone level were significantly higher for those subjects who had the T-C haplotype versus those who did not (P=0.025, P=0.014, and P=0.006 respectively).
Conclusion:
rs6203 and rs1047303 in the HSD3B1 gene are useful genetic markers for EH, while polymorphisms of HSD3B1 are associated with the BP and aldosterone level.
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