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ObesityNCT05055154

Oxidative Stress and L-CBMN Cytome Assay in Obese After 3 Weeks VLCD

A study testing Very low calorie diet in people with Obesity and Weight Loss, run by Special Hospital for Extended Treatment of Duga Resa at 1 site in Croatia.

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

Obesity leads to physiological imbalance resulting in hyperglycemia, dyslipidaemia and inflammation and can generate systematic oxidative stress through multiple biochemical mechanisms. Oxidative stress (OS) can induce DNA damage and inhibit DNA repair mechanisms. Read more about this study

Who is it for?
Ages 18 to 70 years
Conditions the study is for
Obesity, Weight Loss, DNA Damage
What is being tested?
Very low calorie diet
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
26 participants
Where
1 siteCroatia
Study dates
14 Jun 2019to 3 Nov 2020
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 70 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • body mass index ≥ 35 kg/m2

Who cannot join

  • pregnancy
  • actual tumor diseases
  • recent diagnostic or treatment exposures to ionizing radiation in the period of one year
  • individuals not willing to stay 3 weeks under supervision under full 24 h surveillance from the medical stuff

Trial locations and contacts

1 site in 1 country.

Croatia1 site
  • Special Hospital for Extended Treatment of Duga Resa

    Duga Resa, 47250

Other trials in Croatia

About this study

Official title: Oxidative Stress and L-CBMN Cytome Assay Parameters Levels in Severely Obese With BMI ≥ 35kg/m2 After 3 Weeks 567 kcal Hospital Controlled VLCD

Obesity leads to physiological imbalance resulting in hyperglycemia, dyslipidaemia and inflammation and can generate systematic oxidative stress through multiple biochemical mechanisms. Oxidative stress (OS) can induce DNA damage and inhibit DNA repair mechanisms. Very low calorie diet (VLCD) have rapid positive effect on weight loss, glucose homeostasis, insulin resistance, inflammation and OS. The aim of this study is to determine the effect of a three-week VLCD on anthropometric, biochemical and genomic parameters in individuals with BMI ≥ 35kg/m2.

Read the detailed description

Obesity is a complex chronic multifactorial disease associated with concomitant or increased risk for chronic inflammation, insulin resistance, dyslipidemia, oxidative stress, type 2 diabetes, cardiovascular disease, stroke and multiple cancer types. Oxidative stress (OS) can cause permanent DNA damage which could be detected with lymphocytes cytokinesis-block micronucleus (L-CBMN) cytome assay. Weight loss and improvement of dietary habits in people with obesity can affect genome stability and have beneficial effects on insulin sensitivity, inflammation and OS. Effects of very low calorie diet (VLCD) on DNA damage are scarce. The aim of this study is to determine the effect of a three-week VLCD used in Special Hospital for extended treatment of Duga Resa in patients with BMI ≥ 35kg/m2 on permanent DNA damage, lipid profile, insulin resistance, inflammation and anthropometric parameters.

Being tested
Very low calorie diet
Keywords
Obesity, Very low calorie diet, Oxidative stress, Micronuclei, apoptosis
Medical subject headings
Obesity, Weight Loss

What participants receive

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

  • Very low calorie dietDevice

    In hospital patients will eat prepared diet with 567 kcal a day during 3 weeks

Study groups in NCT05055154
Study groupRoleWhat they receive
Very low calorie dietExperimentalUse of very low calorie diet prepared in the hospital
Receives: Device: Very low calorie diet

What is being measured

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

  1. The changes in body mass index

    Body mass index is calculated by dividing body mass (kg) with square of body height (m)

    Measured: Baseline, after 3 weeks of VLCD

  2. The changes in the body fat mass

    Body fat mass (kg) assessed with bioelectrical impedance method

    Measured: Baseline, after 3 weeks of VLCD

  3. The changes in the skeletal muscle mass

    Skeletal muscle mass (kg) assessed with bioelectrical impedance method

    Measured: Baseline, after 3 weeks of VLCD

  4. The changes in the percent body fat

    Percent body fat (%) assessed with bioelectrical impedance method

    Measured: Baseline, after 3 weeks of VLCD

  5. The changes in fasting glucose concentration

    Concentration of glucose (mmol/L)

    Measured: Baseline, after 3 weeks of VLCD

  6. The changes in urea concentration

    Concentration of urea (mmol/L)

    Measured: Baseline, after 3 weeks of VLCD

  7. The changes in lipid profile

    Concentrations of triglycerides (mmo/L), LDL (mmol/L), HDL (mmol/L) cholesterol (mmol/L)

    Measured: Baseline, after 3 weeks of VLCD

  8. The changes in insulin concentration

    Concentration of insulin (mIU/L)

    Measured: Baseline, after 3 weeks of VLCD

  9. The changes in homeostatic model assessment (HOMA) index

    HOMA index is calculated according to the following formula: glucose (mmol/L) x insulin (mIU/L)/22.5

    Measured: Baseline, after 3 weeks of VLCD

  10. The changes in inflammation parameters

    Concentration of C-reactive protein (mg/L) and total white blood cell count

    Measured: Baseline, after 3 weeks of VLCD

Secondary outcomes (2)
  1. The changes in oxidative stress

    Concentration of glutathione (RFU) and reactive oxygen species (RFU)

    Measured: Baseline, after 3 weeks of VLCD

  2. The changes in DNA damage

    Frequency of micronucleus, nuclear buds, nucleoplasmic bridges, apoptotic and necrotic cells among 1000 lymphocytes

    Measured: Baseline, after 3 weeks of VLCD

Timeline

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

  1. First posted24 Sep 2021
  2. Study start14 Jun 2019
  3. Primary completion3 Nov 2020
  4. Study completion3 Nov 2020

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
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
26 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05055154
Sponsor's protocol ID
OSMN35aVLCD-26
Status last verified
Sep 2021
First submitted
14 Sep 2021
Last updated
24 Sep 2021
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Grindel A, Brath H, Nersesyan A, Knasmueller S, Wagner KH. Association of Genomic Instability with HbA1c levels and Medication in Diabetic Patients. Sci Rep. 2017 Feb 2;7:41985. doi: 10.1038/srep41985.

    PubMed 28150817
  • Franzke B, Schwingshackl L, Wagner KH. Chromosomal damage measured by the cytokinesis block micronucleus cytome assay in diabetes and obesity - A systematic review and meta-analysis. Mutat Res Rev Mutat Res. 2020 Oct-Dec;786:108343. doi: 10.1016/j.mrrev.2020.108343. Epub 2020 Nov 2.

    PubMed 33339574
  • Mulligan AA, Luben RN, Bhaniani A, Parry-Smith DJ, O'Connor L, Khawaja AP, Forouhi NG, Khaw KT; EPIC-Norfolk FFQ Study. A new tool for converting food frequency questionnaire data into nutrient and food group values: FETA research methods and availability. BMJ Open. 2014 Mar 27;4(3):e004503. doi: 10.1136/bmjopen-2013-004503.

    PubMed 24674997
  • Kamencic H, Lyon A, Paterson PG, Juurlink BH. Monochlorobimane fluorometric method to measure tissue glutathione. Anal Biochem. 2000 Nov 1;286(1):35-7. doi: 10.1006/abio.2000.4765.

    PubMed 11038270
  • Kalyanaraman B, Darley-Usmar V, Davies KJ, Dennery PA, Forman HJ, Grisham MB, Mann GE, Moore K, Roberts LJ 2nd, Ischiropoulos H. Measuring reactive oxygen and nitrogen species with fluorescent probes: challenges and limitations. Free Radic Biol Med. 2012 Jan 1;52(1):1-6. doi: 10.1016/j.freeradbiomed.2011.09.030. Epub 2011 Oct 2.

    PubMed 22027063
  • Ustundag B, Gungor S, Aygun AD, Turgut M, Yilmaz E. Oxidative status and serum leptin levels in obese prepubertal children. Cell Biochem Funct. 2007 Sep-Oct;25(5):479-83. doi: 10.1002/cbf.1334.

    PubMed 16874844
  • Furukawa S, Fujita T, Shimabukuro M, Iwaki M, Yamada Y, Nakajima Y, Nakayama O, Makishima M, Matsuda M, Shimomura I. Increased oxidative stress in obesity and its impact on metabolic syndrome. J Clin Invest. 2004 Dec;114(12):1752-61. doi: 10.1172/JCI21625.

    PubMed 15599400
  • Keaney JF Jr, Larson MG, Vasan RS, Wilson PW, Lipinska I, Corey D, Massaro JM, Sutherland P, Vita JA, Benjamin EJ; Framingham Study. Obesity and systemic oxidative stress: clinical correlates of oxidative stress in the Framingham Study. Arterioscler Thromb Vasc Biol. 2003 Mar 1;23(3):434-9. doi: 10.1161/01.ATV.0000058402.34138.11. Epub 2003 Jan 30.

    PubMed 12615693
  • Il'yasova D, Wang F, Spasojevic I, Base K, D'Agostino RB Jr, Wagenknecht LE. Racial differences in urinary F2-isoprostane levels and the cross-sectional association with BMI. Obesity (Silver Spring). 2012 Oct;20(10):2147-50. doi: 10.1038/oby.2012.170. Epub 2012 Jun 22.

    PubMed 22836686
  • Kobayashi H, Matsuda M, Fukuhara A, Komuro R, Shimomura I. Dysregulated glutathione metabolism links to impaired insulin action in adipocytes. Am J Physiol Endocrinol Metab. 2009 Jun;296(6):E1326-34. doi: 10.1152/ajpendo.90921.2008. Epub 2009 Apr 14.

    PubMed 19366877
  • Tormos KV, Anso E, Hamanaka RB, Eisenbart J, Joseph J, Kalyanaraman B, Chandel NS. Mitochondrial complex III ROS regulate adipocyte differentiation. Cell Metab. 2011 Oct 5;14(4):537-44. doi: 10.1016/j.cmet.2011.08.007.

    PubMed 21982713
  • Won HY, Sohn JH, Min HJ, Lee K, Woo HA, Ho YS, Park JW, Rhee SG, Hwang ES. Glutathione peroxidase 1 deficiency attenuates allergen-induced airway inflammation by suppressing Th2 and Th17 cell development. Antioxid Redox Signal. 2010 Sep 1;13(5):575-87. doi: 10.1089/ars.2009.2989.

    PubMed 20367278
  • Bozinovski S, Seow HJ, Crack PJ, Anderson GP, Vlahos R. Glutathione peroxidase-1 primes pro-inflammatory cytokine production after LPS challenge in vivo. PLoS One. 2012;7(3):e33172. doi: 10.1371/journal.pone.0033172. Epub 2012 Mar 6.

    PubMed 22412999
  • Picklo MJ, Long EK, Vomhof-DeKrey EE. Glutathionyl systems and metabolic dysfunction in obesity. Nutr Rev. 2015 Dec;73(12):858-68. doi: 10.1093/nutrit/nuv042. Epub 2015 Oct 22.

    PubMed 26493322
  • Setayesh T, Misik M, Langie SAS, Godschalk R, Waldherr M, Bauer T, Leitner S, Bichler C, Prager G, Krupitza G, Haslberger A, Knasmuller S. Impact of Weight Loss Strategies on Obesity-Induced DNA Damage. Mol Nutr Food Res. 2019 Sep;63(17):e1900045. doi: 10.1002/mnfr.201900045. Epub 2019 Jun 14.

    PubMed 31141317

Questions about this trial

What is this clinical trial studying?

A study testing Very low calorie diet in people with Obesity and Weight Loss, run by Special Hospital for Extended Treatment of Duga Resa at 1 site in Croatia.

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 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 24 Sep 2021. 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 Croatia. 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?

The changes in body mass index (time frame: Baseline, after 3 weeks of VLCD). The study lists 10 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 NCT05055154, which also lists 17 linked publications.

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 24 Sep 2021; AzTrials last refreshed its copy on 8 Nov 2026.

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