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Metabolic SyndromeNCT02041104

Impact of Consumption of Beta-glucans on the Intestinal Microbiota and Glucose and Lipid Metabolism

A study testing Bread with added beta-glucans in people with Metabolic Syndrome and Dyslipidemia, run by Mlinotest Zivilska Industrija d.d. at 3 sites in Slovenia.

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 purpose of this study is to investigate if daily consumption of barley beta-glucans effect lipid and glucose metabolism and alter intestinal microbiota composition in participants with metabolic syndrome or with high risk for metabolic syndrome development. Read more about this study

Who is it for?
Ages 30 to 70 years
What is being tested?
Bread with added beta-glucans
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
51 participants
Where
3 sitesSlovenia
Study dates
Feb 2014to Apr 2018
Phase
Interventional
Are there results?
Yes, posted in the registrySummary in the doctors' view

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 70 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

None listed.

Who cannot join

  • Diabetes type II
  • Thyroid disorder
  • Kidney disorder
  • Antibiotic treatment

Trial locations and contacts

3 sites in 1 country.

Slovenia3 sites
  • Community Health Center Ajdovscina

    Ajdovščina, 5270

  • Community Healt Center Ljubljana

    Ljubljana, 1000

  • Community Health Center Franca Amrozica Postojna

    Postojna, 6230

Other trials in Slovenia

About this study

Official title: Impact of Consumption of Beta-glucans on the Intestinal Microbiota and Glucose and Lipid Metabolism in a Population With Metabolic Syndrome

The purpose of this study is to investigate if daily consumption of barley beta-glucans effect lipid and glucose metabolism and alter intestinal microbiota composition in participants with metabolic syndrome or with high risk for metabolic syndrome development. It is assumed that 4-week intervention with beta-glucans will improve some clinical signs of metabolic syndrome and alter composition of intestinal microbiota. Variation in microbiota composition will be investigated with emphasis on Bacteroidetes and Firmicutes ratio. Furthermore it is presupposed that consumption of beta-glucans will stimulate growth of beneficial intestinal bacteria from genus Lactobacillus and Bifidobacteria and consequently effect production of short chain fatty acids in population with metabolic syndrome. Moreover it is presupposed that 4-week consumption of beta-glucans will have influence on glucose metabolism and will consequently improve insulin resistance within people with metabolic syndrome or high risk for metabolic syndrome development. It is assumed that 4-week consumption of beta-glucans will improve specific plasma lipid content in population with metabolic syndrome.

Read the detailed description

In study it will be investigated whether daily consumption of barley beta-glucans integrated in bread product effects lipid and glucose metabolism and alter the composition of intestinal microbiota in a population with metabolic syndrome or with high risk for metabolic syndrome development. 70 participants with metabolic syndrome will be enrolled in study. Participants will daily consume 200 g of bread with high amount of beta-glucans.

Hypothesis:

  1. 4- week consumption of beta-glucans alters composition of intestinal microbiota and changes ratio of bacteria from phylum Bacteroidetes and Firmicutes. Furthermore consumption of beta-glucans stimulates growth of beneficial intestinal bacteria from genus Lactobacillus and Bifidobacteria and consequently effects production of short chain fatty acids in population with metabolic syndrome.
  2. 4- week consumption of beta-glucans has influence on glucose metabolism and consequently improves insulin resistance within people with metabolic syndrome.
  3. 4 - week consumption of beta-glucans improves specific plasma lipid content in population with metabolic syndrome.

Study will be designed as double blind, randomised, placebo controlled clinical trial and performed regarding to CONSORT 2010 recommendations for randomised clinical trials. Patient enrollment will be performed in several community health centres in Slovenia in association with family medicine doctors. Appropriate patients with metabolic syndrome or with high risk for metabolic development will be suggested to participate in clinical trial. Candidates will be suggested to participate in a two month study. If there will not be recruited enough participants for two month study they will be suggested for participation in one month study. Candidates interested in participating in study will be informed about study design and terms and conditions of study by main investigator.

Study will be performed after successful recruitment of first 20 or more participants. Study will be performed three times, so that 70 participants will be recruited in complete study. Participants will consume bread with high beta-glucans content (around 3, 4 g beta-glucans per 100 g of bread) during 8 or 4 week period. Before beginning of study participants will have two week washout period without consuming any pre- and pro-biotics. They will remain their usual eating habits during study period except taking any antibiotics or pre- and pro-biotic. Participants will give blood and stool samples a day before intervention with barley beta-glucans. Blood sampling will involve oral glucose test for insulin resistance determination and sampling for specific lipid content determination. They will also have option to give a blood sample for genetic investigation of genes associated with lipid metabolism (apoE). Blood and stool sampling will be repeated day after intervention period. The same parameters as before intervention period except genetic analysis will be investigated. 72-hour dietary recall will be performed during intervention period individually to evaluate daily nutrient and energetic input of each participant.

Being tested
Bread with added beta-glucans, Placebo Comparator: Bread without added beta-glucans
Keywords
Metabolic syndrome, 4 -week intervention, Randomised placebo controlled parallel study, Beta-glucans, Abdominal fat, Dyslipidemia, Insulin resistance, Hypertension, Gut Microbiota Composition, Oral Glucose Tolerance Test, Lipid Profile, Real-Time Polymerase Chain Reaction, Denaturating Gradient Gel Electrophoresis
Medical subject headings
Metabolic Syndrome, Dyslipidemias, Obesity, Abdominal, Hyperglycemia, Hypertension, Insulin Resistance

What participants receive

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

  • Bread with added beta-glucansDietary supplement

    Participants will daily consume bread with high content of beta-glucans. They will approximately consume 6 g beta-glucans per day in 200 g of bread. Intervention period will be 4 weeks. Meanwhile the participants will remain their usual eating habits except consuming any pro- or pre-biotics

  • Placebo Comparator: Bread without added beta-glucansDietary supplement

    Participants will daily consume placebo bread without any added beta-glucans (approximately 200 g per day). Intervention period will be 4 weeks. Meanwhile the participants will remain their usual eating habits except consuming any pro- or pre-biotics.

Study groups in NCT02041104
Study groupRoleWhat they receive
Bread with added beta-glucansExperimentalExperimental food is bread with high amount of barley beta-glucans. Experimental bread contains approximately 3,4 % (w/w) beta-glucans. Participants will consume 6 g of beta-glucans daily (approximately 200 g of bread per day). Beta-glucans are natural polysaccharides found in grain endosperm and are mostly represented in oat and barley. Beta-glucans are linear homopolymers of D- glycopyranosyl residues with mixed linkage (1-4, 1-3)-β-D-glucans. Their molecular structure enable beta-glucans their functional action that mostly depends of their viscosity and solubility (1). Testing bread has integrated flour with high amount of barley beta-glucans (ReducholTM). Beta-glucans are concentrated in flour up to 15 % with dry milling, sieving and air classification of barley flour.
Receives: Dietary Supplement: Bread with added beta-glucans
Bread without added beta-glucansPlacebo comparatorPlacebo bread without added barley beta-glucans in testing product.
Receives: Dietary Supplement: Placebo Comparator: Bread without added beta-glucans

What is being measured

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

  1. Total Cholesterol Levels

    Before the intervention, total cholesterol levels were determined.

    Measured: Baseline outcome measurement

  2. HDL-cholesterol Levels

    HDL-cholesterol levels were determined before diet intervention.

    Measured: Baseline measurement

  3. LDL-cholesterol Levels

    LDL-cholesterol levels were determined before intervention

    Measured: Baseline measurement

  4. Determination of Composition of Intestinal Microbiota From Fecal Samples

    Fecal sampling for microbiologic analysis of microbiota composition: Composition of intestinal microbiota will be determined with a combination of two molecular techniques denaturating gradient gel electrophoresis (DGGE) and quantitative real time PCR (RT-PCR).

    Measured: Outcome measurement at baseline

  5. Oral Glucose Tolerance Test (OGTT) for Insulin Resistance Determination (Outcome Measures of Plasma Insulin Concentrations)

    Pharmacokinetic outcome measures: Determination of insulin resistance with OGTT testing. Before and after oral consumption of 75 g of glucose, plasma insulin concentrations were measured at following times:

    0 min - before oral consumption of 75 g glucose 30 min, 60 min and 120 min - after oral consumption of 75 g glucose

    Measured: OGTT measurements performed before dietary intervention

  6. Oral Glucose Tolerance Test (OGTT) for Insulin Resistance Determination (Outcome Measures of Plasma Glucose Concentrations)

    Pharmacokinetic outcome measures: Determination of insulin resistance with OGTT testing. Before and after oral consumption of 75 g of glucose, plasma glucose concentrations were measured at following times:

    0 min - before oral consumption of 75 g glucose 30 min, 60 min and 120 min - after oral consumption of 75 g glucose

    Measured: Outcome OGTT measurements performed before dietary intervention

  7. Systolic and Diastolic Blood Pressure

    Before the intervention, systolic and diastolic blood pressure were measured. Measurement was performed to obtain parameters for metabolic syndrome definition. Measurements after dietary intervention weren't performed.

    Measured: Outcome measurement at baseline.

  8. Determination of Concentration of Short Chain Fatty Acids (SCFA) Present in Fecal Samples

    Fecal sampling for SCFA determination: Content of specific SCFA (butyric acid, acetic acid and propionic acid) will be determined in fecal samples using Gas Chromatography.

    Measured: Outcome measurement at baseline

  9. Triglyceride Levels

    Before the diet intervention, triglyceride levels were measured in test (consuming bread with added beta glucans) and in control group (consuming bread without added beta glucans).

    Measured: Outcome measure at baseline.

Secondary outcomes (8)
  1. Determination of Composition of Intestinal Microbiota From Fecal Samples

    Fecal sampling for microbiologic analysis of microbiota composition: Composition of intestinal microbiota will be determined with a combination of two molecular techniques denaturating gradient gel electrophoresis (DGGE) and quantitative real time PCR (RT-PCR).

    Measured: Outcome measurement after 4-week dietary intervention

  2. Determination of Concentration of Short Chain Fatty Acids (SCFA) Present in Fecal Samples

    Fecal sampling for SCFA determination: Content of specific SCFA (butyric acid, acetic acid and propionic acid) will be determined in fecal samples using Gas Chromatography.

    Measured: Outcome measurement after 4-week dietary intervention

  3. LDL-cholesterol Levels

    LDL-cholesterol levels were determined after intervention

    Measured: Outcome measurement after 4-week dietary intervention

  4. HDL-cholesterol Levels

    HDL-cholesterol levels were determined after diet intervention.

    Measured: Outcome measurement after 4-week dietary intervention

  5. Triglyceride Levels

    After the diet intervention, triglyceride levels were measured in test (consuming bread with added beta glucans) and in control group (consuming bread without added beta glucans).

    Measured: Outcome measure after 4-week dietary intervention.

  6. Total Cholesterol Levels

    After the intervention, total cholesterol levels were determined.

    Measured: Outcome measurement after 4-week dietary intervention

  7. Oral Glucose Tolerance Test (OGTT) for Insulin Resistance Determination (Outcome Measures of Plasma Glucose Concentrations)

    Pharmacokinetic outcome measures: Determination of insulin resistance with OGTT testing. Before and after oral consumption of 75 g of glucose, plasma glucose concentration measurements were performed at following times:

    0 min - before oral consumption of 75 g glucose 30 min, 60 min and 120 min - after oral consumption of 75 g glucose

    Measured: Outcome OGTT measurements performed after 4-week dietary intervention

  8. Oral Glucose Tolerance Test (OGTT) for Insulin Resistance Determination (Outcome Measures of Plasma Insulin Concentrations)

    Pharmacokinetic outcome measures: Determination of insulin resistance with OGTT testing. Before and after oral consumption of 75 g of glucose, plasma insulin concentration measurements were performed at following times:

    0 min - before oral consumption of 75 g glucose 30 min, 60 min and 120 min - after oral consumption of 75 g glucose

    Measured: Outcome OGTT measurements performed after 4-week dietary intervention

Timeline

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

  1. First posted20 Jan 2014 (estimated)
  2. Study startFeb 2014
  3. Primary completionApr 2018
  4. Study completionApr 2018

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
Triple blind
Who is masked
Participant, Investigator, Outcomes assessor
Enrolment
51 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT02041104
Sponsor's protocol ID
MLINOTEST/618-001
Status last verified
Feb 2019
First submitted
15 Jan 2014
Last updated
3 Jun 2019
Data monitoring committee
No

Publications

  • (1) Izydorczyk MS,Dexter JE. Barley beta-glucans and arabinoxylans: Molecular structure, physicochemical properties, and uses in food products-a Review. Food Research International 41: 850-868, 2008

Questions about this trial

What is this clinical trial studying?

A study testing Bread with added beta-glucans in people with Metabolic Syndrome and Dyslipidemia, run by Mlinotest Zivilska Industrija d.d. at 3 sites in Slovenia.

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 0 inclusion and 4 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 3 Jun 2019. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 3 sites in Slovenia. 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?

Yes. Results are posted in the registry (first posted 3 Jun 2019). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

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?

Total Cholesterol Levels (time frame: Baseline outcome measurement). The study lists 9 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT02041104, which also lists 1 linked publication.

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 3 Jun 2019.

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