Maternal iNOS genetic polymorphisms and hypertensive disorders of pregnancy

Increased expression and activity of inducible nitric oxide synthase (iNOS) may contribute to the pathogenesis of pre-eclampsia (PE) and gestational hypertension (GH). However, no previous study has examined whether genetic polymorphisms in the iNOS gene are associated with PE or GH. We examined whe...

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Veröffentlicht in:Journal of human hypertension 2012-09, Vol.26 (9), p.547-552
Hauptverfasser: Amaral, L M, Palei, A C T, Sandrim, V C, Luizon, M R, Cavalli, R C, Duarte, G, Tanus-Santos, J E
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container_end_page 552
container_issue 9
container_start_page 547
container_title Journal of human hypertension
container_volume 26
creator Amaral, L M
Palei, A C T
Sandrim, V C
Luizon, M R
Cavalli, R C
Duarte, G
Tanus-Santos, J E
description Increased expression and activity of inducible nitric oxide synthase (iNOS) may contribute to the pathogenesis of pre-eclampsia (PE) and gestational hypertension (GH). However, no previous study has examined whether genetic polymorphisms in the iNOS gene are associated with PE or GH. We examined whether two functional, clinically relevant iNOS genetic polymorphisms (the C −1026 A polymorphism, rs2779249, in the promoter region, and the G2087A polymorphism, rs2297518, in exon 16) are associated with GH or with PE. We studied 565 pregnant women: 212 healthy pregnant (HP), 166 pregnant with GH and 187 pregnant with PE. Genotypes were determined by real-time PCR, using the Taqman allele discrimination assay. The PHASE 2.1 program was used to estimate haplotype distributions in the three study groups. We found no significant association between the C −1026 A polymorphism and PE or GH ( P >0.05). However, we found the GA genotype and the A allele for the G2087A polymorphism at higher frequency in PE, but not in GH, compared with HP ( P 0.05). These findings suggest that iNOS genetic variants may affect the susceptibility to PE, but not to GH.
doi_str_mv 10.1038/jhh.2011.65
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subjects 631/208/726/649
631/208/727/2000
692/699/75/243/793
Adult
Alleles
Arterial hypertension. Arterial hypotension
Biological and medical sciences
Blood and lymphatic vessels
Cardiology. Vascular system
Care and treatment
Clinical manifestations. Epidemiology. Investigative techniques. Etiology
Diagnosis
Epidemiology
Exons
Female
Gene Frequency
Gene polymorphism
Genetic aspects
Genetic Association Studies
Genetic diversity
Genetic polymorphisms
Genetic Predisposition to Disease
Genotype
Haplotypes
Health Administration
Humans
Hypertension in pregnancy
Hypertension, Pregnancy-Induced - genetics
Identification and classification
Medical sciences
Medicine
Medicine & Public Health
Nitric oxide
Nitric Oxide Synthase Type II - genetics
Nitric-oxide synthase
original-article
Polymorphism
Polymorphism, Genetic
Pre-eclampsia
Pre-Eclampsia - genetics
Preeclampsia
Pregnancy
Public Health
Young Adult
title Maternal iNOS genetic polymorphisms and hypertensive disorders of pregnancy
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