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Obesity, MorbidDIABARNCT03330756

The Effects of the Laparoscopic Roux-en-Y Gastric Bypass and Laparoscopic Mini Gastric Bypass on the Remission of Type II Diabetes Mellitus

A study testing laparoscopic Roux-en-Y gastric bypass and laparoscopic Mini gastric bypass in people with Obesity, Morbid and Type 2 Diabetes Mellitus, run by Slotervaart Hospital at 1 site in Netherlands.

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 The sponsor has not verified this record for over two years, so it may be out of date.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

It is estimated that there will be 439-552 million people with type 2 diabetes mellitus (T2DM) globally in 2030. Type 2 Diabetes Mellitus is present in one quarter of patients at the bariatric outpatient clinic. Read more about this study

Who is it for?
Ages 18 to 65 years
Conditions the study is for
Obesity, Morbid, Type 2 Diabetes Mellitus
What is being tested?
laparoscopic Roux-en-Y gastric bypass and laparoscopic Mini gastric bypass
Type of treatment
Surgery or procedure
Could I receive a placebo?
No, everyone receives an active treatment
How many people
220 participants
Where
1 siteNetherlands
Study dates
23 Oct 2017to 1 Nov 2021
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
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • BMI ≥35 and ≤50 kg/m2
  • Diagnosis and treatment of T2DM at intake at bariatric ward with use of anti-diabetic medication.
  • American Society of Anaesthesiologist Classification (ASA) ≤3
  • All patients are required to lose 6 kilograms of weight prior to surgery

Who cannot join

  • Known genetic basis for insulin resistance or glucose intolerance
  • Type 1 DM
  • Prior Bariatric surgery
  • Patients requiring a concomitant intervention (such as cholecystectomy, ventral hernia repair)
  • Auto-immune gastritis
  • Known presence of gastro-esophageal reflux disease
Show all 16Show fewer
  • Known presence of large hiatal hernia requiring concomitant surgical repair
  • Coagulation disorders (PT time > 14 seconds, aPTT ((dependent on laboratory methods) or known presence of bleeding disorders (anamnestic))
  • Known presence of hemoglobinopathy
  • Uncontrolled hypertension (RR > 150/95 mmHg)
  • Renal insufficiency (creatinine > 150 umol/L)
  • Pregnancy
  • Breastfeeding
  • Alcohol or drug dependency
  • Primary lipid disorder
  • Participation in any other (therapeutic) study that may influence primary or secondary outcomes

Trial locations and contacts

1 site in 1 country.

Anne-Sophie van Rijswijk, MD contact

+31205124460

anne-sophie.vanrijswijk@slz.nl

Maurits de Brauw, MD PhD contact

maurits.debrauw@slz.nl

Netherlands1 site, 1 recruiting
  • medical Center Slotervaart

    Amsterdam, North Holland, 1066EC

    Anne-Sophie van Rijswijk, MD, +31205014460, anne-sophie.vanrijswijk@slz.nl

    Maurtis de Brauw, MD PhD, maurits.debrauw@slz.nl

    Recruiting

Other trials in Netherlands

About this study

Official title: The Effects of the Laparoscopic Roux-en-Y Gastric Bypass and the Laparoscopic Mini Gastric Bypass on the Remission of Type II Diabetes Mellitus and the Pathophysiological Mechanisms That Drive the Conversion of Malign to Benign Obesity

It is estimated that there will be 439-552 million people with type 2 diabetes mellitus (T2DM) globally in 2030. Type 2 Diabetes Mellitus is present in one quarter of patients at the bariatric outpatient clinic. It is undecided which metabolic surgery grants best results in the remission of T2DM and which procedure does that at the lowest rate of surgical complications, long term difficulties and side effects. Non alcoholic fatty liver disease (NAFLD) is present in 80% of all morbidly obese subjects and is a major risk factor for development of insulin resistance and non alcoholic steatohepatis (NASH). It is increasingly recognized that the immune system, possibly driven by innate lymphoid cells (ILC's), and the intestinal microbiome are major players in this obesity related disease and the switch from benign to malign (insulin resistance and T2DM) obesity. However, the exact mechanisms of action behind the surgery-driven switch back from malign to benign obesity are unknown.Primary objective is to evaluate and compare the glycaemic control in T2DM within the first year of LRYGB and LMBG. Secondary aim is to gain insight in the pathophysiological mechanisms that drive the conversion of malign to benign obesity.

Read the detailed description

Metabolic surgery has proven to be a viable long-term solution in the treatment of morbid obesity and its comorbidities. It induces rapid remission of type 2 diabetes mellitus (T2DM). Type 2 Diabetes Mellitus is present in one quarter of patients at the bariatric outpatient clinic. Non alcoholic fatty liver disease (NAFLD) is present in 80% of all morbidly obese subjects and is a major risk factor for development of insulin resistance and non alcoholic steatohepatis (NASH), with the latter becoming the major indication for liver transplantation in the USA. It is increasingly recognized that the immune system, possibly driven by innate lymphoid cells (ILC's), and the intestinal microbiome are major players in this obesity related disease and the switch from benign to malign (insulin resistance and T2DM) obesity. However, the exact mechanisms of action behind the surgery-driven switch back from malign to benign obesity are unknown. Also, it is undecided which metabolic surgery grants best results in the remission of T2DM and which procedure does that at the lowest rate of surgical complications, long term difficulties and side effects. The Laparoscopic Roux-en-Y Gastric Bypass (LRYGB), an efficient but complex procedure, is the golden standard in the Netherlands. The Laparoscopic Mini Gastric Bypass (LMGB) is technically less challenging and has been introduced to overcome some of the limitations of LRYGB. It has been hypothesized that the LMGB has a more rapid and durable glycaemic control, possibly due to the altered constitution and the augmented length of the biliary limb. There is reason to believe that the improved glycaemic control might become apparent within the first year of surgery and that it might remain thereafter. However, it is unknown what order of magnitude is to be expected and whether subgroups of T2DM patients will benefit the LMGB more. Also, it is unknown whether and to what extent intestinal microbiota and immunological tone can predict the metabolic response (improvement in insulin sensitivity) and NAFLD/NASH reduction and whether differences are expected between these two surgeries. Increased understanding of the pathophysiological mechanisms as well as their relationship to metabolic disturbances are thought to be of crucial importance to discover new diagnostic and therapeutical targets in obesity associated insulin resistance/T2DM and NAFLD/NASH. Primary objective is to evaluate and compare the glycaemic control in T2DM within the first year of LRYGB and LMBG. Secondary aim is to gain insight in the pathophysiological mechanisms that drive the conversion of malign to benign obesity.

Being tested
laparoscopic Roux-en-Y gastric bypass, laparoscopic Mini gastric bypass
Keywords
Roux-en-Y gastric bypass, Mini gastric bypass, Type 2 diabetes mellitus, Morbid Obesity
Medical subject headings
Obesity, Morbid, Diabetes Mellitus, Type 2

What participants receive

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

  • laparoscopic Roux-en-Y gastric bypassProcedure or surgery

    Also called gastric bypass

    laparoscopic Roux-en-Y gastric bypass with a 50 cm biliary limb and a 150 cm alimentary limb

  • laparoscopic Mini gastric bypassProcedure or surgery

    Also called One anastomosis gastric bypass, omega loop gastric bypass

    laparoscopic Mini gastric bypass with a gastrojejunostomy at 200 centimeters measured from the ligament of Treitz

Study groups in NCT03330756
Study groupRoleWhat they receive
Laparoscopic Roux-en-Y gastric bypassActive comparatorLaparoscopic Roux-en-Y gastric bypass
Receives: Procedure: laparoscopic Roux-en-Y gastric bypass
Laparoscopic Mini Gastric BypassExperimentallaparoscopic Mini gastric bypass
Receives: Procedure: laparoscopic Mini gastric bypass

What is being measured

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

  1. glycaemic control

    as measured by the difference in HBa1C

    Measured: 12 months FU

Secondary outcomes (21)
  1. glycaemic control

    as measured by the difference in HBa1C

    Measured: 6 and 24 months FU

  2. glycaemic control

    as measured by the difference in HBa1C and anti-diabetic medication

    Measured: 6, 12 and 24 months FU

  3. Insulin sensitivity

    Mixed meal tolerance test for level of insulin sensitivity

    Measured: baseline, 12, 24 months FU

  4. NAFLD/NASH

    NAFLD/NASH parameters in liver biopsy measured with the Steatosis, Activity and Fibrosis (SAF) score according to Bedossa et al (2012).For each patient a SAF score summarizing the main histological lesions will be defined. The steatosis score (S) will assess the quantities of larger or median-sized lipid droplets but not foamy microvesicules from 0 to 3 (S0 <5%; S1 5-33%; S2 34-66% and S3>67%). Activity grade (A) from 0-4 is the unweighted addition of hepatocyte ballooning (0-2) and lobular inflammation (0-2). Stage of fibrosis will be assessed using the score described by NASH-CRN as follows; stage 0 (F0) no fibrosis; stage 1 (F1) 1a or 1b perisinusoidal zone 3 or 1c portal fibrosis; stage 2 (F2) persinusoidal and periportal fibrosis without bridging; stage 3 (F3) bridging fibrosis and stage 4 (F4) cirrhosis. A diagnostic algorithm which will be used during this study can be found in the original paper published by Bedossa et al.

    Measured: day of surgery, reoperation

  5. Presence of bacterial DNA/bacterial metabolites - portal vein

    in portal vein blood

    Measured: day of surgery, reoperation

  6. Presence of bacterial DNA/bacterial metabolites - liver

    in liver

    Measured: day of surgery, reoperation

  7. Presence of bacterial DNA/bacterial metabolites - abdominal adipose tissue

    in abdominal adipose tissue depots

    Measured: day of surgery, reoperation

  8. Expression and differentiation of intestinal immunological cells - GALT

    in GALT

    Measured: day of surgery, reoperation

  9. Expression and differentiation of intestinal immunological cells - abdominal adipose tissue

    in abdominal adipose tissue depots

    Measured: day of surgery, reoperation

  10. Expression and differentiation of intestinal immunological cells - liver

    in liver

    Measured: day of surgery, reoperation

  11. Expression and differentiation of intestinal immunological cells - peripheral blood

    in peripheral blood

    Measured: day of surgery, reoperation

  12. Expression and differentiation of immunological cells

    ILC's, macrophages

    Measured: 12 and 24 months FU

  13. Expression and differentiation of inflammatory markers

    IL6, IRX3 and 5

    Measured: 12 and 24 months FU

  14. Small intestinal and fecal microbiota composition

    feces

    Measured: 2, and 6 weeks, 6 months, as well as 12 and 24 months after surgery

  15. Peripheral blood inflammatory markers

    ILC's, macrophages, T/B-cells and dendritic cells

    Measured: 2, and 6 weeks, 6 months, as well as 12 and 24 months after surgery

  16. Eating habits

    G-food craving questionnaire (FCQ-T) 21 item questionaire scale 0 (never) - 6 (always)

    Measured: baseline, 12, 24 months FU

  17. Eating habits

    10 questions, scale 0-10 for instance 0 not hungry -10 very hungry / satiety / craving salty food / craving sweet food / craving fat food

    Measured: baseline, 12, 24 months FU

  18. Excreted metabolites

    urine

    Measured: baseline, 12, 24 months FU

  19. Bio electric impedance

    body composition as assesed by bioelectical impedance analysis (BIA): the measurement of body fat in relation to lean body mass.

    Measured: baseline, 12, 24 months FU

  20. Quality of life

    Quality of life (IWQOL lite) 5 domain questionaire, 31 items: 1 never true - 5 always true

    Measured: baseline, 12, 24 months FU

  21. Cardiac / ventricular hypertrophy

    Electrocardiogram (ECG)

    Measured: baseline, 12, 24 months FU

Timeline

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

  1. First posted6 Nov 2017
  2. Study start23 Oct 2017
  3. Primary completion1 Nov 2021 (estimated)
  4. Study completion1 Nov 2021 (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
Parallel groups
Model description
Single-center, open randomized controlled clinical trial
Masking
None (open label)
Enrolment
220 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03330756
Sponsor's protocol ID
P1729
Acronym
DIABAR
Status last verified
Nov 2017
First submitted
13 Oct 2017
Last updated
9 Nov 2017
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Pyykko JE, Hinnen C, Aydin O, Nieuwdorp M, De Brauw LM, Bruin SC, van Olst N, Gerdes VEA, Sanderman R, Hagedoorn M. Attachment style and post-bariatric surgery health behaviours: the mediating role of self-esteem and health self-efficacy. BMC Psychol. 2023 Aug 25;11(1):248. doi: 10.1186/s40359-023-01273-5.

    PubMed 37626349
  • van Rijswijk A, van Olst N, Meijnikman AS, Acherman YIZ, Bruin SC, van de Laar AW, van Olden CC, Aydin O, Borger H, Beuers UHW, Herrema H, Verheij J, Apers JA, Backhed F, Gerdes VEA, Nieuwdorp M, de Brauw LM. The effects of laparoscopic Roux-en-Y gastric bypass and one-anastomosis gastric bypass on glycemic control and remission of type 2 diabetes mellitus: study protocol for a multi-center randomized controlled trial (the DIABAR-trial). Trials. 2022 Oct 22;23(1):900. doi: 10.1186/s13063-022-06762-3.

    PubMed 36273149

Questions about this trial

What is this clinical trial studying?

A study testing laparoscopic Roux-en-Y gastric bypass and laparoscopic Mini gastric bypass in people with Obesity, Morbid and Type 2 Diabetes Mellitus, run by Slotervaart Hospital at 1 site in Netherlands.

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 16 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 9 Nov 2017. 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 Netherlands. 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?

Results are not available in the source record.

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

Contact Anne-Sophie van Rijswijk, MD (+31205124460, anne-sophie.vanrijswijk@slz.nl), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

glycaemic control (time frame: 12 months FU). 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 NCT03330756, which also lists 2 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 9 Nov 2017.

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