Correlation between natriuretic peptide receptor C (NPR3) gene polymorphisms and hypertension in the Dai people of China

Abstract

ABSTRACT. Hypertension affects one-fifth of the world population. Genome-wide association studies (GWAS) have identified several single nucleotide polymorphisms (SNPs) that correlated with hypertension in large samples. However, the genetic mutations leading to hypertension might differ among various populations, as they have different origins and are subjected to different environmental pressures. Therefore, additional studies are urgently needed to verify the GWAS findings across different populations. This study focused on the natriuretic peptide receptor C gene (NPR3), one of the hypertension-positive genes identified in a GWAS of an East Asian population. The correlation analysis between NPR3 and hypertension was replicated in 450 Chinese Dai (235 patients vs 215 controls) and 484 Chinese Mongolian (211 patients vs 273 controls) individuals. The positive SNP identified by GWAS analysis and three other tag SNPs representing the NPR3 linkage disequilibrium (LD) block regions were selected for genotyp- 8787 NPR3 and hypertension in Chinese Dai©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 14 (3): 8786-8795 (2015) ing. The results revealed that the rs1173766 polymorphism was associated with the occurrence of hypertension (χ 2 = 6.87, P = 0.0088), and that the T allele should be protective in the Dai ethnic group. Considering a close LD block at the 3' end of the NPR3 gene in the East Asian population, we speculate that there might be a mutation in the last five exons or the 3' untranslated region of NPR3 that could change the structure or expression of the NPR3 gene. However, in the Mongolian ethnic group, these SNPs were not associated with the incidence of hypertension, suggesting population heterogeneity for the genetic factors that contribute to hypertension.

Association ofNPR3polymorphism with risk of essential hypertension in a Chinese population

“…12 Increase in circulating ANP/BNP levels can lead to decrease in BP. 21 Studies have also showed an association between NPR3 polymorphism and BP level in type 2 diabetes. NPR-C is detected in the heart, lung, kidney, adrenal, placenta, cerebral cortex and cerebellum, and vascular endothelial cells.…”

“…It was later verified that the rs1173766 polymorphism was associated with decreased risk of hypertension. 21 Studies have also showed an association between NPR3 polymorphism and BP level in type 2 diabetes. 22 Recently, it was observed that rs2270915 (A/G, Asn521Asp) polymorphism was associated with DBP, but not circulating levels of NPs.…”

Molecular Implications of Natriuretic Peptides in the Protection from Hypertension and Target Organ Damage Development

“…More interesting findings were obtained for the NPRC gene encoding the NP clearance receptor. In fact, in two large studies, a gene-centric array and a GWA study identified few blood pressure loci, including one containing NPRC [44,47]. A small case-control association study, utilizing SNPs belonging to NPRC, detected an association with hypertension and even with family history of hypertension [48].…”

Increased SLC7A8 expression mediates L-DOPA uptake by renal tubular epithelial cells

“…According to the Chinese Hypertension League 2009 report, the prevalence of hypertension in the Chinese population is high, affecting one out of five individuals, i.e. >2 billion (1). In the kidney, dopamine receptors serve a pivotal role in blood pressure regulation.…”