Metabolic Syndrome XNCT02202863
Effects of Wine Grape Pomace Flour Used as a Dietary Supplement on Metabolic Syndrome Components
A study testing Red wine grape pomace flour (WGPF) in people with Metabolic Syndrome X and Oxidative Stress, run by Pontificia Universidad Catolica de Chile at 1 site in Chile.
Trial summary
Lifestyle modifications, including healthy food intake, exercise, and suppression of tobacco smoking, constitute the most powerful tool to fight chronic diseases. Antioxidants and fiber, two components of Mediterranean diets, are key functional elements for healthy eating and nutrition. Read more about this study
- Who is it for?
- Ages 30 to 65 years, men only
- Conditions the study is for
- Metabolic Syndrome X, Oxidative Stress
- What is being tested?
- Red wine grape pomace flour (WGPF)
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 47 participants
- Where
- 1 siteChile
- Study dates
- Apr 2013to Sep 2013
- 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 30 to 65 years
- Men only
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Subject who regularly consumed an omnivorous diet.
- Subjects that had at least one of the five components of metabolic syndrome.
Who cannot join
- Subjects that were under treatment for diabetes mellitus, hypertension (> 160/100) or dyslipidemia (hypertriglyceridemia> 500 mg / dl, hypercholesterolemia> 350 mg / dl)
- Subjects who consume drugs affecting lipid profile, blood pressure, metabolism of carbohydrates or the antioxidant capacity of plasma.
- Subjects with obesity, BMI > 30
- Subjects who have had a cardiovascular event.
- Subjects with bariatric surgery
- Subjects with untreated thyroid disease, renal disease (serum creatinine> 1.5 mg / dl), active liver disease, or other rheumatic disease that could alter the measurements.
Show all 9Show fewer
- Subjects with chronic inflammatory diseases.
- Subjects that use of supplements containing antioxidants.
- Smoking more than 5 cigarettes per day
Trial locations and contacts
1 site in 1 country.
Chile1 site
Centro de Nutricion Molecular y Enfermedades Cronicas, Pontificia Universidad Catolica de Chile
Santiago, Centro
About this study
Official title: Study on the Effects of Wine Grape Pomace Flour, Used as a Dietary Supplement to Increase the Intake of Dietary Fiber and Antioxidants in Human, on Components of Metabolic Syndrome, Plasma Antioxidants, Oxidative Stress Markers and Inflammatory Markers
Lifestyle modifications, including healthy food intake, exercise, and suppression of tobacco smoking, constitute the most powerful tool to fight chronic diseases. Antioxidants and fiber, two components of Mediterranean diets, are key functional elements for healthy eating and nutrition. We prepared flour from wine grape pomace (WGPF), a rich source of antioxidant and fiber, to be used as an ingredient for functional foods and as a dietary supplement to increase the intake of dietary fiber and bioactive compounds. WGPF was obtained from red grapes (Cabernet Sauvignon variety, Chile). The byproduct of pressing crushed grapes after alcoholic fermentation was dried, grounded and stored. The purpose of this study is to determine the effects of red wine grape pomace flour intake on glycaemia, plasma lipid profile, plasma antioxidants (vitamin C and E), oxidative stress and inflammatory markers.
Read the detailed description
A 16-week longitudinal intervention study. Males, 30-65 years of age, with at least one component of metabolic syndrome, were randomly assigned to either the intervention group or the control group. At lunch, the intervention group was given 20 g of WGPF per day, which contained 10 g of dietary fiber and an antioxidant capacity of 7,258 ORAC (oxygen radical absorbance capacity) units. Both groups were asked to maintain their regular eating habits and lifestyles. Clinical evaluation, anthropometric measurements and biochemical blood analyses were done at the beginning and the end of the study.
The intervention was carried out at a heavy mining machinery company in Santiago, Chile. All employees were informed about the study and invited to participate. Initially, 47 male workers free of exclusion criteria agreed to participate. The number of participants in each group was chosen based on the variation coefficients in the evolution of total cholesterol in the intervention and in the control group, observed in a previous work (Jiménez, J.P., et al., Effects of grape antioxidant dietary fiber in cardiovascular disease risk factors. Nutrition, 2008. 24(7-8): 646-53).
Statistical analysis: Continuous variables will be shown as mean and standard deviation, while categorical variables as the number of cases and percentage. The student t-test for independent samples and the chi-square test will be used to analyze differences of means and proportions between the two groups, respectively. The student t-test for paired samples and McNemar's test will be used to analyze differences of means and proportions within each group. When appropriate, the Wilcoxon signed rank-sum test will be used to compare paired medians. All p values will be two-tailed and a value <0.05 will be considered to be statistically significant. Data processing and statistical analyses will be done with the SAS statistical software package version 9.1 for Windows.
- Conditions
- Metabolic Syndrome X, Oxidative Stress
- Being tested
- Red wine grape pomace flour (WGPF)
- Keywords
- Dietary intervention, Wine grape pomace flour, Metabolic Syndrome, Oxidative stress, Antioxidants, Fiber
- Medical subject headings
- Metabolic Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Red wine grape pomace flour (WGPF)Dietary supplement
Pomace, a byproduct from wine production, was obtained from red wine grapes, Cabernet Sauvignon, vintage 2011, Maipo Valley, Chile, after alcoholic fermentation. The wine grape pomace was dried and grounded to obtain the flour. Intervention group ate 20 g per day of this flour, which contained 10 g of dietary fiber and an antioxidant capacity of 7,258 ORAC units.
| Study group | Role | What they receive |
|---|---|---|
| Red Wine Grape Pomace Flour (WGPF) | Experimental | Subjects were asked to maintain their regular eating habits and lifestyles for 16 weeks, except for the daily intake of 20 g of WGPF. WGPF was consumed in bread, biscuits or as flour mixed with water during lunch. Bread and biscuits with 20% WGPF were prepared especially in a bakery. WGPF intake was supervised every day at lunch. Participants were asked to consume the flour supplement with their regular meals on weekends. Receives: Dietary Supplement: Red wine grape pomace flour (WGPF) |
| Control | No intervention | Subjects were asked to maintain their regular eating habits and lifestyles for 16 weeks. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Metabolic Syndrome
The presence of metabolic syndrome components was defined using the criteria proposed by the Adult Treatment Panel III of the US National Cholesterol Education Program: (i) abdominal obesity as waist circumference >102 cm for men; (ii) low levels (<40 mg/dL for men) of serum high density lipoprotein cholesterol; (iii) hypertriglyceridemia as 150 mg/dL or more; (iv) elevated blood pressure as 130/85 mm Hg or higher; and (v) impaired glucose homeostasis as fasting plasma glucose levels of 100 mg/dL or higher
Measured: Baseline and 16 weeks
Secondary outcomes (1)
Postprandial insulin
An oral glucose tolerance test (OGTT) was performed after overnight fasting. Subjects ingested a solution containing 75 g of dextrose, and venous blood samples were obtained at 0 and 120 min to determine plasma glucose and insulin levels. Insulin was measured by electrochemiluminescence immunoassay (ECLIA; Roche Diagnostics®).
Measured: Baseline and 16 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Jul 2014 (estimated)
- Study startApr 2013
- Primary completionApr 2013
- Study completionSep 2013
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Metabolic Syndrome XStudies of the same condition, open and under way.
- More trials run by Pontificia Universidad Catolica de ChileThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 47 participants (actual)
Sponsor and investigators
- Lead sponsor
- Pontificia Universidad Catolica de Chile
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Ines Urquiaga, Ph.D, Principal investigator, Centro de Nutricion y Enfermedades Cronicas, Pontificia Universidad Catolica de Chile
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02202863
- Sponsor's protocol ID
- 13-029
- Other IDs
- FONDEF AF10 I1014
- Status last verified
- Jul 2014
- First submitted
- 24 Jul 2014
- Last updated
- 29 Jul 2014
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 Jul 2014. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Study on the Effects of Wine Grape Pomace Flour, Used as a Dietary Supplement to Increase the Intake of Dietary Fiber and Antioxidants in Human, on Components of Metabolic Syndrome, Plasma Antioxidants, Oxidative Stress Markers and Inflammatory Markers
- ClinicalTrials.gov ID
- NCT02202863
- Acronym / sponsor ID
- 13-029
- Conditions
- Metabolic Syndrome X, Oxidative Stress
- Keywords
- Dietary intervention, Wine grape pomace flour, Metabolic Syndrome, Oxidative stress, Antioxidants, Fiber
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 47 participants (actual)
- Lead sponsor
- Pontificia Universidad Catolica de ChileUniversity, hospital or other
- Study start
- Apr 2013
- Primary completion
- Apr 2013 (actual)
- Study completion
- Sep 2013 (actual)
- First posted
- 29 Jul 2014 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Lifestyle modifications, including healthy food intake, exercise, and suppression of tobacco smoking, constitute the most powerful tool to fight chronic diseases. Antioxidants and fiber, two components of Mediterranean diets, are key functional elements for healthy eating and nutrition. We prepared flour from wine grape pomace (WGPF), a rich source of antioxidant and fiber, to be used as an ingredient for functional foods and as a dietary supplement to increase the intake of dietary fiber and bioactive compounds. WGPF was obtained from red grapes (Cabernet Sauvignon variety, Chile). The byproduct of pressing crushed grapes after alcoholic fermentation was dried, grounded and stored. The purpose of this study is to determine the effects of red wine grape pomace flour intake on glycaemia, plasma lipid profile, plasma antioxidants (vitamin C and E), oxidative stress and inflammatory markers.
Detailed description
A 16-week longitudinal intervention study. Males, 30-65 years of age, with at least one component of metabolic syndrome, were randomly assigned to either the intervention group or the control group. At lunch, the intervention group was given 20 g of WGPF per day, which contained 10 g of dietary fiber and an antioxidant capacity of 7,258 ORAC (oxygen radical absorbance capacity) units. Both groups were asked to maintain their regular eating habits and lifestyles. Clinical evaluation, anthropometric measurements and biochemical blood analyses were done at the beginning and the end of the study.
The intervention was carried out at a heavy mining machinery company in Santiago, Chile. All employees were informed about the study and invited to participate. Initially, 47 male workers free of exclusion criteria agreed to participate. The number of participants in each group was chosen based on the variation coefficients in the evolution of total cholesterol in the intervention and in the control group, observed in a previous work (Jiménez, J.P., et al., Effects of grape antioxidant dietary fiber in cardiovascular disease risk factors. Nutrition, 2008. 24(7-8): 646-53).
Statistical analysis: Continuous variables will be shown as mean and standard deviation, while categorical variables as the number of cases and percentage. The student t-test for independent samples and the chi-square test will be used to analyze differences of means and proportions between the two groups, respectively. The student t-test for paired samples and McNemar's test will be used to analyze differences of means and proportions within each group. When appropriate, the Wilcoxon signed rank-sum test will be used to compare paired medians. All p values will be two-tailed and a value <0.05 will be considered to be statistically significant. Data processing and statistical analyses will be done with the SAS statistical software package version 9.1 for Windows.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Red Wine Grape Pomace Flour (WGPF) | Experimental | Dietary Supplement: Red wine grape pomace flour (WGPF)Subjects were asked to maintain their regular eating habits and lifestyles for 16 weeks, except for the daily intake of 20 g of WGPF. WGPF was consumed in bread, biscuits or as flour mixed with water during lunch. Bread and biscuits with 20% WGPF were prepared especially in a bakery. WGPF intake was supervised every day at lunch. Participants were asked to consume the flour supplement with their regular meals on weekends. |
| Control | No intervention | –Subjects were asked to maintain their regular eating habits and lifestyles for 16 weeks. |
Who may qualify
- Ages
- 30 to 65 years
- Sex
- Male only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Subject who regularly consumed an omnivorous diet.
- Subjects that had at least one of the five components of metabolic syndrome.
Key exclusion criteria (9 listed)
- Subjects that were under treatment for diabetes mellitus, hypertension (> 160/100) or dyslipidemia (hypertriglyceridemia> 500 mg / dl, hypercholesterolemia> 350 mg / dl)
- Subjects who consume drugs affecting lipid profile, blood pressure, metabolism of carbohydrates or the antioxidant capacity of plasma.
- Subjects with obesity, BMI > 30
- Subjects who have had a cardiovascular event.
- Subjects with bariatric surgery
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Red wine grape pomace flour (WGPF)Pomace, a byproduct from wine production, was obtained from red wine grapes, Cabernet Sauvignon, vintage 2011, Maipo Valley, Chile, after alcoholic fermentation. The wine grape pomace was dried and grounded to obtain the flour. Intervention group ate 20 g per day of this flour, which contained 10 g of dietary fiber and an antioxidant capacity of 7,258 ORAC units. | Dietary supplement | Red Wine Grape Pomace Flour (WGPF) |
Primary outcome
Metabolic Syndrome
Time frame: Baseline and 16 weeks
The presence of metabolic syndrome components was defined using the criteria proposed by the Adult Treatment Panel III of the US National Cholesterol Education Program: (i) abdominal obesity as waist circumference >102 cm for men; (ii) low levels (<40 mg/dL for men) of serum high density lipoprotein cholesterol; (iii) hypertriglyceridemia as 150 mg/dL or more; (iv) elevated blood pressure as 130/85 mm Hg or higher; and (v) impaired glucose homeostasis as fasting plasma glucose levels of 100 mg/dL or higher
1 secondary outcome
Postprandial insulin
Time frame: Baseline and 16 weeks
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Jul 2014.
Related trials for Metabolic Syndrome X
Not yet recruitingPhase 2
Effects of Meal Macronutrients on Postprandial Lipids
Nephrotic Syndrome, Lipodystrophy
RecruitingObservational study
Longitudinal Study of Ultra-rare Inherited Metabolic and Degenerative Neurological Diseases.
Inherited Disease, Rare Diseases
RecruitingObservational study
Cancer in Inherited Bone Marrow Failure Syndromes
Diamond Blackfan Anemia, Dyskeratosis Congenita
RecruitingPhase 1/2
The Effect of SGLT2 Inhibition on Adipose Inflammation and Endothelial Function
Obesity, Metabolic Syndrome
Enrolling by invitationEarly Phase 1
Truway Diagnostic Tools in Primary Care
Chronic Disease, Type 2 Diabetes Mellitus (T2DM), Obesity, Overweight
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Ines Urquiaga, Ph.D principal investigator
Centro de Nutricion y Enfermedades Cronicas, Pontificia Universidad Catolica de Chile
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Red wine grape pomace flour (WGPF) in people with Metabolic Syndrome X and Oxidative Stress, run by Pontificia Universidad Catolica de Chile at 1 site in Chile.
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 2 inclusion and 9 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 29 Jul 2014. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Chile. 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. 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?
Metabolic Syndrome (time frame: Baseline and 16 weeks). 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 29 Jul 2014.