Collection of Human Metabolic Tissues

Recruiting

• Conditions: Obesity; Insulin Resistance; Diabetes Mellitus, Type 2
• Interventions: Other: Collection of blood samples and tissues

• Registration Number: NCT02861781
• Lead Sponsor: University Hospital, Montpellier

Brief Summary

This project aims at identifying new determinants of type 2 diabetes in severe obesity. To do so, a biological collection, including tissues of interest in the field of metabolism, will be collected during bariatric surgery in obese patients. Three different groups of metabolic status of patients, corresponding to different stages of evolution of the disease, will be constituted: type 2 diabetes, insulin resistance, insulin sensitivity.

The main objective is to compare, between these 3 groups of patients, several biological processes that may be involved in the pathophysiology of type 2 diabetes and disorders associated with obesity, including:

* Abnormalities of the transcriptome, proteome, metabolome in all target tissues (plasma, serum, muscle, subcutaneous and visceral adipose tissue, omental artery, liver)

* Identification of metabolic signatures, protein and miRNA in plasma

* Immunoinflammatory response in adipose tissue

* Polymorphisms SNP from whole blood

* Histological analysis of tissue sections This main objective will be studied on samples taken at the time of surgery Secondary objectives will be to study the changes in metabolites, proteins and miRNA in plasma level 3 and 12 months after the completion of surgery, according to the initial metabolic state.

Detailed Description

Not available

Study Timeline

• Study Start: 2016-02-02
• Study First Submitted: 2016-08-02
• Study First Submitted QC: 2016-08-05
• Study First Posted: 2016-08-10
• Status Verified: 2025-01
• Last Update Submitted: 2025-01-16
• Last Update Posted: 2025-01-17
• Primary Completion: 2028-09
• Study Completion: 2028-09

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 270

Inclusion Criteria

1. Written informed consent

2. Age 18 - 65 years inclusive at surgery

3. IMC > 35

4. Subject qualified for bariatric surgery (sleeve gastrectomy or gastric bypass)

5. Specific criteria :

   • Type 2 diabetes group (D) (90 patients) : type 2 diabetes according to ADA criteria
   • Insulin resistance non diabetes group (IR) (80 patients) : HOMA-IR criteria ≥ 3
   • Insulin Sensitivity non diabetes group (N) (100 patients) : N1.HOMA-IR criteria < 3

Non inclusion Criteria:

1. Vulnerability according to article L1121-6 of the Public Health Code
2. Protected adult or unability to give consent according to article L1121-8 of the Public Health Code
3. Unability to understand the design and aims of the study or to communicate with the investigator
4. Non affiliation to a social security system
5. Prior bariatric surgery (except lap-band procedure)
6. Serologic profile indicating hepatitis B, hepatitis C or HIV infection
7. Inflammatory, infectious or autoimmune disease (current or in the previous 3 month)
8. Malignancies within 5 years prior to inclusion or not considered as treated curatively
9. Concomitant use of steroids or NSAI or use in the 8 days before surgery
10. alcohol abuse/addiction
11. Anticipated poor compliance to study procedures
12. Other type of diabetes than type 2

Exclusion Criteria :

1. Cancelled bariatric surgery
2. Tissue collection not possible during the bariatric surgery

Exclusion Criteria

Not provided

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Insulin resistance non diabetes	Collection of blood samples and tissues	HOMA-IR criteria ≥ 3
Type 2 diabetes	Collection of blood samples and tissues	Type 2 diabetes according to ADA criteria
Insulin sensitivity non diabetes	Collection of blood samples and tissues	HOMA-IR criteria \< 3

Primary Outcome Measures

Name	Time	Method
comparison of proteins levels	At baseline (day of surgery)	in liver, muscle, adipose tissue and plasma according to metabolic state
comparison of metabolites	At baseline (day of surgery)
comparison of miRNA	At baseline (day of surgery)	in liver, muscle, adipose tissue and plasma according to metabolic state

Secondary Outcome Measures

Name	Time	Method
changes in proteins in plasma level	3 and 12 months after the completion of surgery
changes in metabolites in plasma level	3 and 12 months after the completion of surgery
changes in miRNA in plasma level	3 and 12 months after the completion of surgery

Trial Locations

Locations (1)

Hôpital Saint Eloi; 🇫🇷 Montpellier, France