Bariatric surgery is recognized as a therapeutic modality of type 2 diabetes. The mechanisms of this remission of diabetes remain poorly understood.

The aim of our research is to characterize the changes in muscle secretome induced by bariatric surgery and to determine their role in improving the insulin sensitivity of skeletal muscle and insulin secretion by the B cell responsible for the remission of diabetes.

Bariatric surgery is recognized as a therapeutic modality of type 2 diabetes. The mechanisms of this remission of diabetes remain poorly understood.

The aim of our research is to characterize the changes in muscle secretome induced by bariatric surgery and to determine their role in improving the insulin sensitivity of skeletal muscle and insulin secretion by the B cell responsible for the remission of diabetes.

This prospective study will be carried out in insulin-resistant diabetic patients or not in whom blood and muscle samples will be carried out before and after bariatric surgery

Inclusion Criteria:

• Age from 19 to 69 year-old Candidate for bariatric surgery BMI ≥ 35kg / m² with at least one subsequent comorbidity (SAS or type 2 diabetes mellitus or refractory HTA) or BMI ≥ 40kg / m² Non-diabetic or diabetic with HbA1c <7.5% without treatment except metformin Caucasian No pregnancy or breastfeeding No history of neoplasia in the last 5 years No history of uncontrolled endocrinopathy other than diabetes Informed consent signed by patient

Exclusion Criteria:

• Non-caucasian Major Depression Hemorrhagic risk (biopsy) associated with taking anticoagulants/antiaggregants Known myopathy Systemic administration of steroids (> 1mg/kg in hydrocortisone) Hyperthyroidism Type 1 diabetes Psychological, familial, sociological or geographical condition potentially limiting compliance with the protocol Participation in other clinical drug studies Modification of anti-diabetic treatment during the month preceding surgery

There no plan at this moment