A Study on the Effect of Bariatric Surgery on Glucose Metabolism in Chinese Obese and Type 2 Diabetes Patients

NCT05894811 | Not Yet Recruiting

• 1 other identifier: DCTC-IIR202307
• Study Type: observational
• Target: 48
• Locations: 0 countries
• Sites: N/A

Brief Summary

The study will be conducted in the following population: obese patients with normal glucose tolerance (HbA1c ≤ 5.6%, n=12), pre-sugar patients (5.7% ≤ HbA1c ≤ 6.4%, n=18) and patients with T2DM (HbA1c ≥ 6.4% , n=18). After recruiting, they were followed up at 1, 3, 6, and 12 months postoperatively, and their preoperative and follow-up examination values related to demographics, body composition, blood biochemistry, and glucose metabolic balance, as well as quantitative MRI imaging and oral glucose tolerance test (OGTT) will be collected. An interim analysis will be performed at 6 months postoperatively and overall analysis will be performed at 12 months postoperatively by descriptive statistics and ANOVA methods to explore the effect of adiposity on the progression of diabetes mellitus and insulin secretory function.

Conditions

Diabete Type 2; Obesity

Keywords

Diabete Type 2; Obesity

Outcome Measures

Primary Outcomes (2)

• Visceral fat content

  Visceral fat content (MRI)

  1 day

• Islet function indicators

  indicators describing Islet function calculated from OGTT data using MTT model

  1 day

Study Arms (3)

control

obese people with normal glucose tolerance

Diagnostic Test: oral glucose tolerance test; Diagnostic Test: MRI

IGT

obese people with injured glucose tolerance

Diagnostic Test: oral glucose tolerance test; Diagnostic Test: MRI

T2D

obese people with type 2 diabetes

Diagnostic Test: oral glucose tolerance test; Diagnostic Test: MRI

Interventions

oral glucose tolerance test DIAGNOSTIC_TEST

Nine blood samples were collected from subjects within 4 hours of oral glucose administration, 0 min before oral glucose administration, and 10, 20, 30, 60, 90, 120, 180, 240 min afterwards, and 4 mL of venous blood was collected at each time point for glucose, C-peptide and insulin concentrations.

IGT; T2D; control

MRI DIAGNOSTIC_TEST

Using MRI to quantify of fat content in the liver and pancreas of the subjects

IGT; T2D; control

Eligibility Criteria

• Age: 16 Years - 65 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Obese people who will undergo sleeve gastrectomy in Peking University Third Hospital and meet the admission criteria.

You may qualify if:

• BMI ≥ 28 kg/m2, meeting the indications for surgical weight loss surgery (gastrectomy)
• Normal glucose tolerance group: HbA1c ≤ 5.6%; ≥ 6 cases aged 24 years or above
• IGT patients: 5.7% ≤ HbA1c ≤ 6.4%; ≥ 12 cases aged 24 years or above
• T2DM patients: Subjects with HbA1c ≥ 6.4% or HbA1c well controlled by medication can be diagnosed as T2DM based on self-reported or fasting/postprandial blood glucose diagnosis; ≥ 12 cases aged 24 years and above.
• Between the ages of 16 and 65 (inclusive), with no less than one-third of either gender
• The subjects understand the content of the informed consent form and voluntarily sign it, which allows them to maintain good communication with the researchers and comply with the requirements of the clinical trial

You may not qualify if:

• Type I diabetes patients (autoimmune diabetes patients with T1DM antibody)
• Suffering from special types of diabetes, including cortisolism, growth hormone tumor, glucagon tumor and diabetes caused by some genetic factors
• Significant weight loss occurred before enrollment (\>3% weight loss in the first 3 months)
• Participated in other research projects as a subject within 6 months prior to screening
• Donate or lose ≥ 400 mL of blood within 8 weeks prior to screening
• Regular use (cumulative use for 3 months in the past 12 months) or treatment with corticosteroids, contraceptives, thiazide diuretics, and quinolone antibiotics in the past two months
• Regular use (cumulative use for 3 months in the past 12 months) or treatment with anti obesity drugs in the past two months
• The following hypoglycemic drugs have been used routinely (for 3 months accumulatively in the past 12 months) or in the past two months: sulfonylureas (glibenclamide, glipizide, gliclazide, gliquidone, glimepiride, etc.), non sulfonylureas (repaglinide, nateglinide, migglinide, etc.), GLP-1 receptor agonists (exenatide, lilalutide, etc.) DPP-4 inhibitors (sigliptin, alogliptin, vildagliptin, shagliptin, linagliptin, etc.) or glucokinase agonists (doegliptin, etc.)
• Contraindications to magnetic resonance imaging
• The risk of complications significantly increases during the perioperative or postoperative period
• Those with a history of other weight loss surgeries
• Individuals with a history of cardiovascular surgery and severe cardiovascular and pulmonary diseases: including stroke, severe coronary heart disease, arrhythmia, unstable angina, myocardial infarction within 6 months, peripheral vascular disease, heart failure, and uncontrolled hypertension
• Clinically significant history of ECG abnormalities or family history of long QT syndrome (grandparents, parents, brothers and sisters)
• People with a history of kidney disease: have a history or evidence of renal insufficiency, manifested as clinically significant creatinine abnormalities or urinary composition abnormalities (such as tubular abnormalities), or eGFR\<60 ml/min/1.73m2
• Patients with a history of gastrointestinal surgery (excluding appendectomy and cholecystectomy), inflammatory bowel disease, esophageal disease, including severe refractory esophagitis, Barrett's disease, esophageal motility disorders, or other gastric motility impairments, or those with esophageal hiatal hernia\>3cm in size, chronic or acute bleeding, including peptic ulcer disease, portal hypertension (gastric or esophageal varices), chronic pancreatitis or cirrhosis

Sponsors & Collaborators

• Dongyang Liu: lead

Biospecimen

Retention: SAMPLES WITH DNA

whole blood

MeSH Terms

Conditions

Diabetes Mellitus, Type 2; Obesity

Interventions

Glucose Tolerance Test

Condition Hierarchy (Ancestors)

Diabetes Mellitus; Glucose Metabolism Disorders; Metabolic Diseases; Nutritional and Metabolic Diseases; Endocrine System Diseases; Overweight; Overnutrition; Nutrition Disorders; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Blood Chemical Analysis; Clinical Chemistry Tests; Clinical Laboratory Techniques; Diagnostic Techniques and Procedures; Diagnosis; Diagnostic Techniques, Endocrine; Investigative Techniques

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: researcher

Study Record Dates

• First Submitted: May 30, 2023
• First Posted: June 8, 2023
• Study Start: June 1, 2023
• Primary Completion (Estimated): June 1, 2026
• Study Completion (Estimated): December 1, 2026
• Last Updated: June 8, 2023

Record last verified: 2023-05

Data Sharing

• IPD Sharing: Will not share