Early Changes of Diabetes Parameters After Obesity Therapy

NCT ID: NCT02553213

Last Updated: 2018-05-17

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2015-07-31

Study Completion Date

2019-07-31

Brief Summary

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The aim of the study is to investigate, if bariatric surgery or the related caloric restriction causes the significant improvement of glucose metabolism, which has been found in bariatric patients.

Detailed Description

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Previous studies have shown, that laparoscopic Roux-en-Y gastric bypass (LRYGB), and also laparoscopic sleeve gastrectomy (LSG) leed to a significant improvement of glucose metabolism and in many cases to a complete remission of diabetes type II in obese patients. It is still unclear which mechanisms underlie these changes. Since the positive effects of bariatric surgery have been investigated within few days after surgical intervention, before significant weight loss has been achieved, the caloric restriction has been discussed as a possible mechanism.

The aim of the study is to investigate, if bariatric surgery or the related caloric restriction causes the significant improvement of glucose metabolism, which has been found in bariatric patients. Therefore, the investigator will examine obese patients with diabetes type II or impaired glucose metabolism regarding possible metabolic changes within few days after bariatric surgery (LSG or LRYGB) or caloric restriction only.

Group I: Patients undergoing LSG; Group II: Patients undergoing LRYGB; Group III (Control group): Patients undergoing caloric restriction;

Dietetic, anthropometric, metabolic and hormonal parameters will be measured. Primary outcome marker is the insulin sensitivity according to Matsuda (MISI).

The project is a prospective, controlled study. Study examinations will be performed before intervention, and one, two, three, four and five days after (start of) intervention, as well after one month.

Conditions

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Bariatric Surgery Candidate

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

FACTORIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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LSG group

Laparoscopic sleeve gastrectomy

Group Type EXPERIMENTAL

Laparoscopic sleeve gastrectomy

Intervention Type OTHER

The surgical procedure and aftercare is indicated and performed according to the routine clinical setting of the Hospital. Patients stay 5 days stationary after surgical treatment. They receive a defined easy digestible diet, starting with liquid and mash food.

easy digestible diet

Intervention Type OTHER

LRYGB group

Laparoscopic Roux-en-Y gastric bypass

Group Type EXPERIMENTAL

Laparoscopic Roux-en-Y gastric bypass

Intervention Type OTHER

The surgical procedure and aftercare is indicated and performed according to the routine clinical setting of the Hospital. Patients stay 5 days stationary after surgical treatment. They receive a defined easy digestible diet, starting with liquid and mash food.

easy digestible diet

Intervention Type OTHER

Control group

Caloric restriction

Group Type OTHER

Caloric restriction diet

Intervention Type OTHER

Patients of the control group do not undergo surgical treatment. They undergo a caloric restriction diet for 5 days. This diet is adapted to the postoperative diet of the patients included in the two other groups.

Interventions

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Laparoscopic sleeve gastrectomy

The surgical procedure and aftercare is indicated and performed according to the routine clinical setting of the Hospital. Patients stay 5 days stationary after surgical treatment. They receive a defined easy digestible diet, starting with liquid and mash food.

Intervention Type OTHER

Laparoscopic Roux-en-Y gastric bypass

The surgical procedure and aftercare is indicated and performed according to the routine clinical setting of the Hospital. Patients stay 5 days stationary after surgical treatment. They receive a defined easy digestible diet, starting with liquid and mash food.

Intervention Type OTHER

Caloric restriction diet

Patients of the control group do not undergo surgical treatment. They undergo a caloric restriction diet for 5 days. This diet is adapted to the postoperative diet of the patients included in the two other groups.

Intervention Type OTHER

easy digestible diet

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* BMI (Body Mass Index) ≥ 35 kg/m2
* Clinical diagnosis of type II diabetes or impaired glucose metabolism (Prediabetes: HbA1c \> 5,7%, fasting glucose in capillary blood \> 110 mg/dl - diagnosed by blood glucose test at the first study examination)
* Regarding the patients of the surgical groups: Indication to surgical therapy of obesity (laparoscopic sleeve gastrectomy or Roux-en-Y gastric bypass). The indication to surgery is independent of the study. The surgeon decides about that in the clinical routine according to the German S3 guideline.
* Written consent to participate int he study

Exclusion Criteria

* Medication use which affects glucose metabolism, except for diabetes medication (for example: glucocorticoids)
* Insulin need \>1,0 IU/kg/d
* Experimental diabetes medication within the last three months
* Pregnancy
* Gastrointestinal diseases
* Uncontrolled hypo- or hyperthyroidism
* Status after bariatric or other gastrointestinal surgery
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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University Hospital Tuebingen

OTHER

Sponsor Role collaborator

Karl-Olga-Krankenhaus Stuttgart

UNKNOWN

Sponsor Role collaborator

University of Hohenheim

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Stephan C. Bischoff, Prof.

Role: STUDY_CHAIR

Department of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany

Alfred Königsrainer, Prof.

Role: STUDY_DIRECTOR

Department of General, Visceral, and Transplant Surgery, University Hospital Tübingen, Germany

Locations

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University of Hohenheim

Stuttgart, , Germany

Site Status RECRUITING

Countries

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Germany

Central Contacts

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Anna Schweinlin

Role: CONTACT

+4971145924880

Facility Contacts

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Anna Schweinlin

Role: primary

+4971145924880+4970712986584

Other Identifiers

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Studie_ECODO

Identifier Type: -

Identifier Source: org_study_id

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