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Neuropeptide Y gene functional polymorphism influences susceptibility to hypertension in Indian population

Abstract

Hypertension is an independent determinant of cardiovascular risk, a phenotype that usually has a strong genetic component. Neuropeptide Y (NPY) plays an important role in BP homeostasis. The aim of this study was to investigate the possible influence of NPY polymorphisms on hypertension in a South Indian population. A total of 252 subjects (132 controls and 120 hypertensives) were analysed for T1128C, G1258A and A7735G polymorphisms in the NPY gene. Body mass index (BMI), pulse, SBP and DBP were assessed. Direct sequencing of PCR products was adopted for genotyping. All three polymorphisms were found to be in Hardy–Weinberg equilibrium. Additive, dominant and recessive models were tested using multivariate regression analysis. The results of our study reveal a significant association between T1128C and hypertension even after adjusting for age, sex and BMI. The adjusted OR (95% confidence interval) for the recessive model was 0.56 (0.33–0.95). The other two polymorphic sites (G1258A and A7735G) are not associated with hypertension. The Pro7 allele of the T1128C polymorphic site-containing haplotype (CGA) is associated with hypertension (P=0.049), but the combined haplotypes did not show any evidence of haplotype–phenotype association (global P=0.129). These data support the hypothesis that hypertension is influenced by the NPY T1128C polymorphism.

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Acknowledgements

This work was supported by a grant from Department of Biotechnology, Government of India (grant no. BT/PR3607/SPD/09/261/2003).

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Correspondence to V R Rao.

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Bhaskar, L., Thangaraj, K., Non, A. et al. Neuropeptide Y gene functional polymorphism influences susceptibility to hypertension in Indian population. J Hum Hypertens 24, 617–622 (2010). https://doi.org/10.1038/jhh.2009.104

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