Effect of olive oil phenolic compounds on the expression of blood pressure-related genes in healthy individuals

• Published in: European journal of nutrition Vol. 56; no. 2; pp. 663 - 670
• Main Authors: Martín-Peláez, Sandra, Castañer, Olga, Konstantinidou, Valentini, Subirana, Isaac, Muñoz-Aguayo, Daniel, Blanchart, Gemma, Gaixas, Sonia, de la Torre, Rafael, Farré, Magí, Sáez, Guillermo T, Nyyssönen, Kristina, Zunft, Hans Joachim, Covas, Maria Isabel, Fitó, Montse
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2017; Springer Nature B.V
• Subjects: Adult; Aldosterone - genetics; biomarkers; Biomarkers - analysis; blood; Blood Pressure - genetics; Chemistry; Chemistry and Materials Science; Cross-Over Studies; diastolic blood pressure; diet; Dietary Fats, Unsaturated - administration & dosage; Double-Blind Method; extra-virgin olive oil; gene expression; Gene Expression - drug effects; genes; Humans; ingestion; Leukocytes, Mononuclear - metabolism; Liver X Receptors - genetics; Male; Middle Aged; Nutrition; Olive Oil - chemistry; olives; Original Contribution; Peptidyl-Dipeptidase A - genetics; Phenols - administration & dosage; Receptors, Interleukin-8A - genetics; Renin-Angiotensin System - genetics; systolic blood pressure; Nutrigenomics; Blood pressure; Olive oil; Phenolic compounds; RAAS
• ISSN: 1436-6207; 1436-6215; 1436-6215
• DOI: 10.1007/s00394-015-1110-z

Purpose To investigate whether the ingestion of olive oil having different phenolic contents influences the expression of blood pressure-related genes, involved in the renin–angiotensin–aldosterone system, in healthy humans. Methods A randomized, double-blind, crossover human trial with 18 healthy subjects, who ingested 25 mL/day of olive oils (1) high (366 mg/kg, HPC) and (2) low (2.7 mg/kg, LPC) in phenolic compounds for 3 weeks, preceded by 2-week washout periods. Determination of selected blood pressure-related gene expression in peripheral blood mononuclear cells (PBMNC) by qPCR, blood pressure and systemic biomarkers. Results HPC decreased systolic blood pressure compared to pre-intervention values and to LPC, and maintained diastolic blood pressure values compared to LPC. HPC decreased ACE and NR1H2 gene expressions compared with pre-intervention values, and IL8RA gene expression compared with LPC. Conclusions The introduction to the diet of an extra-virgin olive oil rich in phenolic compounds modulates the expression of some of the genes related to the renin–angiotensin–aldosterone system. These changes could underlie the decrease in systolic blood pressure observed.