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Published in: European Journal of Nutrition 1/2017

01-02-2017 | Original Contribution

A Mediterranean diet supplemented with extra virgin olive oil or nuts improves endothelial markers involved in blood pressure control in hypertensive women

Authors: C. E. Storniolo, R. Casillas, M. Bulló, O. Castañer, E. Ros, G. T. Sáez, E. Toledo, R. Estruch, V. Ruiz-Gutiérrez, M. Fitó, M. A. Martínez-González, J. Salas-Salvadó, M. T. Mitjavila, J. J. Moreno

Published in: European Journal of Nutrition | Issue 1/2017

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Abstract

Purpose

Serum nitric oxide (NO) reduction and increased endothelin-1 (ET-1) play a pivotal role in endothelial dysfunction and hypertension. Considering that traditional Mediterranean diet (TMD) reduces blood pressure (BP), the aim of this study was to analyze whether TMD induced changes on endothelial physiology elements such as NO, ET-1 and ET-1 receptors which are involved in BP control.

Methods

Non-smoking women with moderate hypertension were submitted for 1 year to interventions promoting adherence to the TMD, one supplemented with extra virgin olive oil (EVOO) and the other with nuts versus a control low-fat diet (30 participants/group). BP, NO, ET-1 and related gene expression as well as oxidative stress biomarkers were measured.

Results

Serum NO and systolic BP (SBP) or diastolic BP (DBP) were negatively associated at baseline, as well as between NO and ET-1. Our findings also showed a DBP reduction with both interventions. A negative correlation was observed between changes in NO metabolites concentration and SBP or DBP after the intervention with TMD + EVOO (p = 0.033 and p = 0.044, respectively). SBP reduction was related to an impairment of serum ET-1 concentrations after the intervention with TMD + nuts (p = 0.008). We also observed changes in eNOS, caveolin 2 and ET-1 receptors gene expression which are related to NO metabolites levels and BP.

Conclusions

The changes in NO and ET-1 as well as ET-1 receptors gene expression explain, at least partially, the effect of EVOO or nuts on lowering BP among hypertensive women.
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Metadata
Title
A Mediterranean diet supplemented with extra virgin olive oil or nuts improves endothelial markers involved in blood pressure control in hypertensive women
Authors
C. E. Storniolo
R. Casillas
M. Bulló
O. Castañer
E. Ros
G. T. Sáez
E. Toledo
R. Estruch
V. Ruiz-Gutiérrez
M. Fitó
M. A. Martínez-González
J. Salas-Salvadó
M. T. Mitjavila
J. J. Moreno
Publication date
01-02-2017
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Nutrition / Issue 1/2017
Print ISSN: 1436-6207
Electronic ISSN: 1436-6215
DOI
https://doi.org/10.1007/s00394-015-1060-5

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