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The effects of endothelial nitric oxide synthase tagSNPs on nitrite levels and risk of hypertension and obesity in children and adolescents

Journal of Human Hypertension volume 29, pages 109–114 (2015)Cite this article

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A Corrigendum to this article was published on 07 January 2015

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Abstract

Obesity and the nitric oxide synthase 3 (NOS3) gene polymorphisms are associated with nitrite levels and hypertension. However, no study has tested the hypothesis that NOS3 tagSNPs rs3918226, rs3918188, rs743506 and rs7830 affect nitrite levels and are associated with hypertension in childhood obesity. We investigated the association of these NOS3 tagSNPs and the haplotypes formed by them with hypertension and with nitrite levels in children and adolescents with obesity and with obesity plus hypertension. We studied 355 subjects: 174 healthy (controls), 109 normotensive obese, and 72 obese children and adolescents with obesity plus hypertension. Genotypes were determined by Taqman allele discrimination assay and real-time PCR. We compared the distribution of NOS3 tagSNP genotypes, alleles and haplotypes in the three groups of subjects. Nitrite levels were determined by ozone-based chemiluminescence. Nitrite levels were affected by the rs3918226 polymorphism (P<0.05) but not by NOS3 haplotypes. There was no association between the tagSNPs studied and hypertension in children and adolescents. Our findings show that the NOS3 tagSNP rs3918226 is associated with NO production in children and adolescents, and suggest that this polymorphism may have an impact on cardiovascular health. Further studies are needed to better clarify the effects of this polymorphism on cardiovascular risk.

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  • 05 November 2014

    This paper was modified 12 months after initial publication to switch to Creative Commons licence terms, as noted at publication

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Acknowledgements

This study was funded by Fundação de Amparo a Pesquisa do Estado de São Paulo (FAPESP-Brazil) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq-Brazil).

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Authors and Affiliations

  1. Department of Pharmacology, State University of Campinas, Campinas, SP, Brazil

    J A de Miranda & J T Sertorio

  2. Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil

    R Lacchini, V A Belo, M R Luizon & J E Tanus-Santos

  3. Department of Physiology, Institute of Biologic Science, Federal University of Juiz de Fora, University Campus, Juiz de Fora, MG, Brazil

    C M M Lanna

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  1. J A de Miranda
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  2. R Lacchini
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Correspondence to J E Tanus-Santos.

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de Miranda, J., Lacchini, R., Belo, V. et al. The effects of endothelial nitric oxide synthase tagSNPs on nitrite levels and risk of hypertension and obesity in children and adolescents. J Hum Hypertens 29, 109–114 (2015). https://doi.org/10.1038/jhh.2014.48

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  • DOI: https://doi.org/10.1038/jhh.2014.48

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