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HypertensionNCT05460221

Antihypertensive and Cardioprotective Evaluation of a Functional Olive Oil

A study testing Optimized oil group and Functional oil group in people with Hypertension, run by Universidad de Granada at 2 sites in Spain.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The general objective of this study is to evaluate the effect of a nutritional intervention with an extra virgin olive oil (EVOO) rich in bioactive compounds (polyphenols) and a functional oil of adequate organoleptic quality, prepared with the same EVOO rich in polyphenols and also enriched in triterpenic acid… Read more about this study

Who is it for?
Ages 6 to 18 years
Conditions the study is for
Hypertension
What is being tested?
Optimized oil group and Functional oil group
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
50 participants
Where
2 sitesSpain
Study dates
1 Jan 2022to 30 Sep 2024
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 6 to 18 years
  • All sexes
  • No healthy volunteers
  • Child, Adult

Who may be able to join

  • Age between 6 and 18 years Percentile levels compatible with arterial hypertension or very high risk (SBP and/or DBP over P90) Without previous medication for hypertension Acceptance to participate by signing the informed consent

Who cannot join

  • Children under 6 years of age Absence of hypertension Children who require or receive some type of medication to control blood pressure, glucose levels or dyslipidemia or any probiotic Not to sign the informed consent.

Trial locations and contacts

2 sites in 1 country.

Spain2 sites
  • Hospital Universitario Reina Sofia de Córdoba

    Córdoba, 14004

  • Universidad de Granada

    Granada, 18071

Other trials in Spain

About this study

Official title: Antihypertensive and Cardioprotective Clinical Evaluation of a Functional Olive Oil Enriched in Bioactive Compounds From the Olive Tree

The general objective of this study is to evaluate the effect of a nutritional intervention with an extra virgin olive oil (EVOO) rich in bioactive compounds (polyphenols) and a functional oil of adequate organoleptic quality, prepared with the same EVOO rich in polyphenols and also enriched in triterpenic acid compounds from the olive itself, and demonstrate its antihypertensive and cardioprotective effect in children and adolescents (between 6-18 years) at risk of untreated hypertension.

Read the detailed description

A clinical study of nutritional intervention, randomized, adjusted by randomization blocks that consider age and sex, and parallel duration of 6 months, in 75 subjects (25 per randomization group) is proposed. The study will be carried out at the UGC of Pediatrics of the Reina Sofía University Hospital in Córdoba, as well as at the Institute of Nutrition and Food Technology of the University of Granada.

The effects of an optimized oil rich in polyphenols and obtained by mixing varieties rich in said bioactive compounds (approx. 490 ppm), and a functional oil prepared with the same optimized oil and enriched with triterpenic acids obtained from the olive itself (approx. 490 ppm of polyphenols and 380 ppm of triterpenic acids). The study will be carried out in pediatric patients with high levels of untreated blood pressure, in which the effect of oils on blood pressure and their action on biomarkers of cardiovascular risk and on the intestinal microbiota will be evaluated, depending on the genotype specific to each subject. In addition, the presence of minor olive oil compounds present in the plasma will be analyzed (metabolomic analysis). In this way, at the end of the project, verified scientific information will be available on the enriched product and its effects on cardiovascular protection, and on possible mechanisms of action, as well as on its palatability and acceptance.

The general objective of this study is to evaluate the effect of a nutritional intervention with an EVOO rich in bioactive compounds (polyphenols) and a functional oil of adequate organoleptic quality, prepared with the same EVOO rich in polyphenols and also enriched in triterpenic acid compounds from the olive itself, and demonstrate its antihypertensive and cardioprotective effect in children and adolescents (between 6-18 years) at risk of untreated hypertension.

As specific objectives will be determined:

  • To evaluate the effect of olive oils on blood pressure levels
  • To evaluate the effect of olive oils on the levels of other components of the metabolic syndrome.
  • To evaluate the effect of olive oils on the antioxidant defense system
  • To evaluate the effect of olive oils on biomarkers of cardiovascular risk, including markers of inflammation and endothelial damage.
  • To evaluate the effect of olive oils on the intestinal microbiota.
  • To evaluate the effect of olive oils on metabolomic changes in plasma.
  • To analyze the specific genotype of each volunteer and its relationship with the clinical effects found.
Conditions
Hypertension
Being tested
Optimized oil group, Functional oil group, Control group
Keywords
Extra virgin olive oil, Polyphenols, Triterpenic acids, Hipertensive children
Medical subject headings
Hypertension

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Optimized oil groupDietary supplement

    This is a controlled parallel study. The patient will receive 25 mL/day of three different types of olive oils with different amouns of bioactive compounds from the olive tree, that must be consumed throughout the day at breakfast or snack (depending on the habits of each child). The doses that they do not take must be returned to the hospital staff to assess adherence to the intervention. The families will receive the same type of oil so that they can cook with it during the study period.

    The control oil will be the same extra virgin olive oil washed to decrease bioactive components (approx. 125 ppm).

    The intervention will take place for 6 months.

  • Functional oil groupDietary supplement

    This is a controlled parallel study. The patient will receive 25 mL/day of three different types of olive oils with different amouns of bioactive compounds from the olive tree, that must be consumed throughout the day at breakfast or snack (depending on the habits of each child). The doses that they do not take must be returned to the hospital staff to assess adherence to the intervention. The families will receive the same type of oil so that they can cook with it during the study period.

    The control oil will be the same extra virgin olive oil washed to decrease bioactive components (approx. 125 ppm).

    The intervention will take place for 6 months.

  • Control groupDietary supplement

    This is a controlled parallel study. The patient will receive 25 mL/day of three different types of olive oils with different amouns of bioactive compounds from the olive tree, that must be consumed throughout the day at breakfast or snack (depending on the habits of each child). The doses that they do not take must be returned to the hospital staff to assess adherence to the intervention. The families will receive the same type of oil so that they can cook with it during the study period.

    The control oil will be the same extra virgin olive oil washed to decrease bioactive components (approx. 125 ppm).

    The intervention will take place for 6 months.

Study groups in NCT05460221
Study groupRoleWhat they receive
Optimized oil groupActive comparatorEach participant will consume 25 mL/day during 6 months of an Optimized extra virgin olive oil obtained by mixing different varieties of oils rich in bioactive compounds (it contains approx. 490 ppm of bioactive compounds).
Receives: Dietary Supplement: Optimized oil group
Functional oil groupExperimentalEach participant will consume 25 mL/day during 6 months of a Functional olive oil prepared with the same Optimized oil and enriched with triterpenic acids obtained from the olive tree (approx. 490 ppm of polyphenols and 380 ppm of triterpenic acids).
Receives: Dietary Supplement: Functional oil group
Control GroupPlacebo comparatorEach participant will consume 25 mL/day during 6 months of a Control extra virgin olive oil prepared from the same Optimized oil washed to eliminate bioactive compounds (approx. 125 ppm of polyphenols).
Receives: Dietary Supplement: Control group

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Changes of systolic blood pressure

    Changes on systolic blood pressure will be measured at the beginning, 3 and 6 months after the intervention. It will be measured in a sitting position and after 5 minutes of rest, using an OMRON HEM 705 CP device, with the cuff adapted to each child, on the left arm. Systolic and diastolic blood pressure will be measured in duplicate, and the mean of both measurements will be recorded, in millimeters of mercury.

    Measured: 0 month; 3 month; 6 month

  2. Change from Baseline Diastolic Blood Pressure at 6 months

    Changes on systolic and diastolic blood pressure will be measured at the beginning, 3 and 6 months after the intervention. It will be measured in a sitting position and after 5 minutes of rest, using an OMRON HEM 705 CP device, with the cuff adapted to each child, on the left arm. Systolic and diastolic blood pressure will be measured in duplicate, and the mean of both measurements will be recorded, in millimeters of mercury.

    Measured: 0 month; 3 month; 6 month

Secondary outcomes (26)
  1. Change n weight from baseline to 6 months

    Change from baseline weight (kg) at 6 months. For weight assessment, a Tanita 780PMA model precision scale will be used. It will always be carried out with the patient in underwear, standing on the scale in a standard anatomical position without using any extra point of support that could modify the measurement.

    Patients will be measured with the direct reading Harpenden Stadiometer with a wall-mounted indicator counter, measuring 600-2100 mm, approved by the University of London Institute of Child Health; standing on the height rod, without wearing shoes.

    Measured: 0 month; 3 month; 6 month

  2. Change on body mass index (BMI) from Baseline to 6 months

    To calculate changes in BMI is necessary to determine weight (kilograms) and height (meters).

    The body mass index (BMI) or Quetelet index (Weight/Height²) will be stratified according to the International reference values of Cole and Bellizi to classify obesity.

    Measured: 0 month; 3 month; 6 month

  3. Change of body composition from Baseline to 6 months

    Bioimpedance test will be performed to assess changes on body composition, with emphasis on fat mass, using a Tanita 780PMA model precision scale.

    Measured: 0 month; 3 month; 6 month

  4. Dietary intake and eating habits

    Assessment of changes on dietary intake will be evaluated at the beginning, 3 and 6 months after the intervention with three 24-hour reminders separated by at least one week in accordance with the EFSA recommendations for this type of study, all of them previously validated. At the beginning of the study, a questionnaire on the frequency of food consumption will be carried out.

    Measured: 0 month; 3 month; 6 month

  5. Physical activity

    Assessment of changes on physical activity will be assessed at the beginning, 3 and 6 months after the intervention through the PAQ-C Physical Activity questionnaire

    Measured: 0 month; 3 month; 6 month

  6. Sedentary activities

    Assessment of the level of sedentary activities will be evaluated at the beginning, 3 and 6 months after the intervention through an ad hoc questionnaire on time spent watching television and use of computers, video games and consoles, validated for young children and school children, as well as other socioeconomic determinants

    Measured: 0 month; 3 month; 6 month

  7. Hemogram

    Changes on blood count will be analyzed on an automated analyzer

    Measured: 0 month; 3 month; 6 month

  8. Blood glucose

    Changes on blood glucose will be analyzed by the glucose oxidase method on an automated analyzer (Roche-Hitachi Modular P and D Autoanalyser; Roche Laboratory Systems, Mannheim, Germany)

    Measured: 0 month; 3 month; 6 month

  9. Blood insulin

    Changes on plasma insulin will be analyzed by radioimmunoassay (RIA) using an automated microparticle analyzer. (AxSYM; Abbott Laboratories, Abbott Park, IL, USA).

    Measured: 0 month; 3 month; 6 month

  10. Insulin resistance

    Changes on insulin resistance (IR) will be calculated by homeostatic model assessment of IR (HOMA-IR).

    Measured: 0 month; 3 month; 6 month

  11. Serum triacylglycerides

    Changes on serum, triglycerides will be measured using an automatic analyzer ( Roche-Hitachi Modular P and D Autoanalyser; Roche Laboratory Systems, Mannheim, Germany).

    Measured: 0 month; 3 month; 6 month

  12. Serum cholesterol

    Changes on serum total cholesterol, high-density lipoprotein cholesterol (HDLc) and low-density lipoprotein cholesterol (LDLc), as well as Apoprotein A and B, and Lipoprotein A1 will be measured using an automatic analyzer ( Roche-Hitachi Modular P and D Autoanalyser; Roche Laboratory Systems, Mannheim, Germany).

    Measured: 0 month; 3 month; 6 month

  13. Endothelial function biomarkers in blood

    Simultaneous detection of endothelial adhesion molecules VCAM-1, ICAM, E-selectin and myeloperoxidase will be performed in children's plasma, using MULTIPLEX assay kits and Luminex xMAP detection technology, which allows us to quantitatively determine several biomarkers using a very small amount of sample (25-50 µl of plasma or serum). The HCVD2MAG-67K kit will be used to determine the adhesion molecules.

    Measured: 0 month; 3 month; 6 month

  14. Antioxidant glutathione reductase activity in red blood cells

    Assessing changes of glutathione reductase activity will be carried out using standardized spectrophotometric methods.

    Measured: 0 month; 3 month; 6 month

  15. Antioxidant glutathione peroxidase activity in red blood cells

    Assessing changes of glutathione peroxidase activity will be carried out using standardized spectrophotometric methods.

    Measured: 0 month; 3 month; 6 month

  16. Antioxidant superoxide dismutase activity in red blood cells

    Assessing changes of superoxide dismutase activity will be carried out using standardized spectrophotometric methods.

    Measured: 0 month; 3 month; 6 month

  17. Antioxidant catalase activity in red blood cells

    Assessing changes of catalase activity will be carried out using standardized spectrophotometric methods.

    Measured: 0 month; 3 month; 6 month

  18. Antioxidant alpha-tocopherol, beta-carotene, retinol and Coenzyme Q in plasma

    Assessing changes of plasma antioxidants: alpha-tocopherol, beta-carotene, retinol, and coenzyme Q will be analysed by HPLC-MS in one single inyection

    Measured: 0 month; 3 month; 6 month

  19. Urine endothelin-1

    Assessing changes of endothelin-1 will be analyzed in plasma using an ELISA kit.

    Measured: 0 month; 3 month; 6 month

  20. Analysis of oxLDL in plasma

    Assessing changes of oxidized LDL from the baseline to the end of each treatment, by using an ELISA kit

    Measured: 0 month; 3 month; 6 month

  21. F2-Isoprostanes in urine

    Assessing changes of F2-Isoprostanes will be carried out using an ELISA kit.

    Measured: 0 month; 3 month; 6 month

  22. 8-hydroxy-deoxy-Guanosine in urine

    Assessing changes of 8-hydroxy-deoxy-Guanosine will be carried out using an ELISA kit.

    Measured: 0 month; 3 month; 6 month

  23. Metagenomics

    Assessing changes of fecal microbiome profile from the baseline to the end of each treatment. Stool DNA will be isolated with the QIAamp DNA stool mimi kit. Amplification of variable region V3-V1 of 16S gen will be sequenced using the Illunina Next Generation Sequencing MiSeg.

    Measured: 0 month; 6 month

  24. Plasma metabolomic analysis

    A liquid chromatography platform coupled to a spectrophotometer will be used mass (LC/MS) to determine metabolic profiles by targeted analyses

    Measured: 0 month; 6 month

  25. Urine metabolomic analysis

    A liquid chromatography platform coupled to a spectrophotometer will be used mass (LC/MS) to determine metabolic profiles by targeted analyses

    Measured: 0 month; 3 month; 6 month

  26. Genotyping

    Genotyping of the main candidate genes related to the development of arterial hypertension described in GWAS studies (ACE, ADRB1, AGT, PHACTR1, EDN1, ATP13A3) will be carried out in the Department of Biochemistry and Molecular Biology II of the University of Granada.

    Measured: 0 month

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted15 Jul 2022
  2. Study start1 Jan 2022
  3. Primary completion31 Dec 2023
  4. Study completion30 Sep 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
50 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05460221
Sponsor's protocol ID
MEDKIDS_HTA
Other IDs
IDI-20190985
Status last verified
Oct 2022
First submitted
7 Mar 2022
Last updated
1 Apr 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing Optimized oil group and Functional oil group in people with Hypertension, run by Universidad de Granada at 2 sites in Spain.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 1 Apr 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in Spain. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Changes of systolic blood pressure (time frame: 0 month; 3 month; 6 month). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 1 Apr 2025.

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