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G6PD DeficiencyNCT05571748

Oxidative Stress, Carbohydrate Metabolism Disorders and G6PD Deficiency

A study testing Alpha-lipoic acid in people with G6PD Deficiency and Carbohydrate Metabolism Disorder, run by University of Thessaly.

Unknown status

Status not confirmed. The sponsor has not verified this record for over two years, so it may be out of date.

Official record
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Trial summary

The purpose of this study is to investigate the effects of alpha-lipoic acid supplementation on redox status, physiological and biochemical parameters in diabetic individuals with G6PD deficiency, after acute exercise. Read more about this study

Who is it for?
Ages 18 to 65 yearsHealthy volunteers can take part
What is being tested?
Alpha-lipoic acid
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
40 participants
Where
No sites listed yet
Study dates
Feb 2023to Jun 2023
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 18 to 65 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Individuals with normal G6PD activity
  • Individuals with G6PD deficiency
  • Individuals with CHO metabolism disorders (diabetes, prediabetes)
  • Individuals with G6PD deficiency and CHO metabolism disorders (diabetes, prediabetes)

Who cannot join

  • Health problems that contraindicate participation to exercise
  • Should not take any medication that affects the body's antioxidant mechanisms as well as dietary supplements containing antioxidants
  • Women during lactation or gestation

Trial locations and contacts

No sites are listed yet.

Athanasios Z Jamurtas, PhD contact

2431047054 ext. +30

ajamurt@pe.uth.gr

Athanasios Gatsas, MSc contact

6971559250 ext. +30

t.gatsas@yahoo.gr

About this study

Official title: The Association Between Oxidative Stress and Carbohydrate Metabolism Disorders in G6PD Deficient Individuals

The purpose of this study is to investigate the effects of alpha-lipoic acid supplementation on redox status, physiological and biochemical parameters in diabetic individuals with G6PD deficiency, after acute exercise.

Read the detailed description

In a randomized double-blind, crossover design, a total of forty people will participate in the research voluntarily: (a) ten people with G6PD (Mediterranean type) enzyme deficiency), (b) ten people with G6PD (Mediterranean type) enzyme deficiency and a disorder of carbohydrate metabolism (diabetes, prediabetes), (c) ten people with a disorder of carbohydrate metabolism (diabetes mellitus and prediabetes) and, (d) ten people without any health problem (control group). They will be supplemented with either 600 mg of alpha-lipoic acid (experimental condition) or placebo (control condition) every day for 4 weeks, separated by a 4-week washout period. All participants will be randomly assigned to both conditions.

Before intervention, all participants will be informed about the study protocol, fill a medical history questionnaire and sign an informed consent form. Moreover, measurements of anthropometric characteristics and physiological parameters, as well as a VO2peak test will be performed.

Participants will perform a trial of exercise (70% VO2peak for 45min and 90% till exhaustion) before and after each condition (i.e. a total of 4 trials). Blood samples will be collected before, immediately after and 1 hour after each exercise trial. Moreover, measurements of anthropometric characteristics, physiological and psychological parameters will be performed before and after each condition.

Being tested
Alpha-lipoic acid, Placebo
Medical subject headings
Glucosephosphate Dehydrogenase Deficiency

What participants receive

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

  • Alpha-lipoic acidDietary supplement

    Also called Physical exercise

    A trial of acute exercise before and after 4 weeks of alpha-lipoic acid supplementation.

  • PlaceboOther

    Also called Physical exercise

    A trial of acute exercise before and after 4 weeks of placebo supplementation.

Study groups in NCT05571748
Study groupRoleWhat they receive
G6PD deficiency (only) - InterventionExperimentalAlpha-lipoic acid supplementation (600 mg/day) for 4 weeks in a counterbalanced manner to 10 G6PD deficient individuals.
Receives: Dietary Supplement: Alpha-lipoic acid
G6PD deficiency (only) - PlaceboPlacebo comparatorPlacebo administration for 4 weeks in a counterbalanced manner to 120 G6PD deficient individuals.
Receives: Other: Placebo
G6PD deficiency and CHO metabolism disorder - InterventionExperimentalAlpha-lipoic acid supplementation (600 mg/day) for 4 weeks in a counterbalanced manner to 10 individuals with G6PD deficiency and a CHO metabolism disorder.
Receives: Dietary Supplement: Alpha-lipoic acid
G6PD deficiency and CHO metabolism disorder - PlaceboPlacebo comparatorPlacebo for 4 weeks in a counterbalanced manner to 10 individuals with G6PD deficiency and a CHO metabolism disorder.
Receives: Other: Placebo
CHO metabolism disorder (only) - InterventionExperimentalAlpha-lipoic acid supplementation (600 mg/day) for 4 weeks in a counterbalanced manner to 10 individuals with a CHO metabolism disorder.
Receives: Dietary Supplement: Alpha-lipoic acid
CHO metabolism disorder (only) - PlaceboPlacebo comparatorPlacebo for 4 weeks in a counterbalanced manner to 10 individuals with a CHO metabolism disorder.
Receives: Other: Placebo
Controls - InterventionExperimentalAlpha-lipoic acid supplementation (600 mg/day) for 4 weeks in a counterbalanced manner to 10 individuals without G6PD deficiency and/or any CHO metabolism disorder.
Receives: Dietary Supplement: Alpha-lipoic acid
Controls - PlaceboPlacebo comparatorPlacebo for 4 weeks in a counterbalanced manner to 10 individuals without G6PD deficiency and/or any CHO metabolism disorder.
Receives: Other: Placebo

What is being measured

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

  1. Changes in total antioxidant capacity following 4 weeks of supplementation and placebo at rest and following a trial of acute exercise.

    Index of blood redox status. Spectrophotometric assay for the determination of total antioxidant capacity using DPPH method.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  2. Changes in glutathione following 4 weeks of supplementation and placebo at rest and following a trial of acute exercise.

    Index of blood redox status. Spectrophotometric assay for the determination of total antioxidant capacity using DTNB method.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  3. Changes in uric acid following 4 weeks of supplementation and placebo at rest and following a trial of acute exercise.

    Index of blood redox status. Spectrophotometric assay for the determination of total antioxidant capacity using a clinical chemistry analyzer with commercially available kits.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  4. Changes in bilirubin following 4 weeks of supplementation and placebo at rest and following a trial of acute exercise.

    Index of blood redox status. Spectrophotometric assay for the determination of bilirubin using a clinical chemistry analyzer with commercially available kits.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  5. Changes in lipid peroxidation following 4 weeks of supplementation and placebo at rest and following a trial of acute exercise.

    Index of blood redox status. Determination of lipid peroxidation using malondialdehyde production assessment.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  6. Changes in protein carbonyls following 4 weeks of supplementation and placebo at rest and following a trial of acute exercise.

    Index of blood redox status. Spectrophotometric assay for the determination of total antioxidant capacity using DNPH method.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  7. Changes in blood lipids following 4 weeks of supplementation and placebo at rest and following a trial of acute exercise.

    Blood lipids (total cholesterol, LDL-c, HDH-c, triglycerides). Spectrophotometric assays for the determination of blood lipids using a clinical chemistry analyzer with commercially available kits.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  8. Changes in insulin resistance following 4 weeks of supplementation and placebo.

    Measurement of blood glucose and insulin levels to assess HOMA-IR and evaluate insulin resistance. Spectrophotometric assay for the determination of blood glucose using a clinical chemistry analyzer with commercially available kits.Determination of blood insulin using commercially available Eliza kits.

    Measured: Before and following 4 weeks of supplementation and placebo.

  9. Changes in glycated hemoglobin (HbA1c) following 4 weeks of supplementation and placebo.

    Measurement of HbA1c using commercially available kits.

    Measured: Before and following 4 weeks of supplementation and placebo.

Secondary outcomes (14)
  1. Changes in body composition following 4 weeks of intervention and placebo.

    Body fat mass (in kg) and percentage, lean mass (in kg) and percentage

    Measured: Before and following 4 weeks of supplementation and placebo.

  2. Changes in body mass index following 4 weeks of intervention and placebo.

    Body mass (in kg) and height (in cm)

    Measured: Before and following 4 weeks of supplementation and placebo.

  3. Changes in resting heart rate following 4 weeks of intervention and placebo.

    Resting heart rate (beats per minute) measurement after at least 5 minutes at rest

    Measured: Before and following 4 weeks of supplementation and placebo.

  4. Changes in blood pressure following 4 weeks of intervention and placebo.

    Measurement of (systolic and diastolic) blood pressure (in mm Hg) after at least 5 minutes at rest

    Measured: Before and following 4 weeks of supplementation and placebo.

  5. Changes in waist-to-hip ratio following 4 weeks of intervention and placebo.

    Measurement of waist and hip circumference to calculate waist-to-hip ratio

    Measured: Before and following 4 weeks of supplementation and placebo.

  6. Changes in complete blood count following 4 weeks of intervention and placebo.

    Complete blood count

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  7. Changes in psychometric test following 4 weeks of intervention and placebo.

    Hospital Anxiety Depression Scale-HADS (Greek version)

    Measured: Before and following 4 weeks of supplementation and placebo.

  8. Trial of VO2peak estimation.

    VO2peak (mL/kg body weight/min) estimation with a treadmill protocol.

    Measured: Before intervention.

  9. Nicotinamide-adenine dinucleotide phosphate (NADPH)

    Spectrophotometric assay for the determination of NADPH in erythrocytes.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  10. Glutathione Reductase (GR)

    Spectrophotometric assay for the determination of GR in erythrocytes.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  11. Glutathione peroxidase (GPx)

    Spectrophotometric assay for the determination of GPx in erythrocytes.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  12. Superoxide dismutases (SOD)

    Spectrophotometric assay for the determination of SOD in erythrocytes.

    Measured: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)

  13. Glucose Tolerance Test (GTT)

    GTT for the investigation of changes in glucose control.

    Measured: Before intervention (blood samples at 0, 30, 60, 90 and 120 minutes after intake of 75 g glucose).

  14. G6PD enzyme activity in erythrocytes

    Quantification of G6PD activity in erythrocytes (units/gram of hemoglobin) of all participants using a commercially available kit.

    Measured: Before intervention. During GTT (blood samples at 0, 30, 60, 90 and 120 minutes after intake of 75 g glucose). Also before, immediately after and 1, 2, 24 hours after each trial of exercise, in both conditions (supplement and placebo).

Timeline

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

  1. First posted7 Oct 2022
  2. Study startFeb 2023 (estimated)
  3. Primary completionMar 2023 (estimated)
  4. Study completionJun 2023 (estimated)

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
Crossover
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
40 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05571748
Sponsor's protocol ID
G6PD_Diabetes
Status last verified
Jan 2023
First submitted
28 May 2022
Last updated
4 Jan 2023
Results posted
No
FDA-regulated drug
No
FDA-regulated device
No

Publications

  • Georgakouli K, Deli CK, Zalavras A, Fatouros IG, Kouretas D, Koutedakis Y, Jamurtas AZ. Alpha-lipoic acid supplementation up-regulates antioxidant capacity in adults with G6PD deficiency. Food Chem Toxicol. 2013 Nov;61:69-73. doi: 10.1016/j.fct.2013.01.055. Epub 2013 Feb 14.

    PubMed 23416142

Questions about this trial

What is this clinical trial studying?

A study testing Alpha-lipoic acid in people with G6PD Deficiency and Carbohydrate Metabolism Disorder, run by University of Thessaly.

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 4 inclusion and 3 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: status not confirmed, as of the sponsor's last update on 4 Jan 2023. Status can change between updates, so confirm with the study contact before making plans.

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?

Results are not available in the source record.

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

Contact Athanasios Z Jamurtas, PhD (2431047054 ext. +30, ajamurt@pe.uth.gr), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Changes in total antioxidant capacity following 4 weeks of supplementation and placebo at rest and following a trial of acute exercise. (time frame: Before, immediately after and 1 hour after each trial of exercise, in both conditions (supplement and placebo)). 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 NCT05571748, 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 4 Jan 2023.

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