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251 active trials for Type 2 Diabetes

Postprandial Metabolism After Bariatric Surgery in Type 2 Diabetes

Bariatric surgery procedures have now been firmly demonstrated to lead to significant improvement and even, in many cases, complete reversal of abnormal glucose homeostasis in type 2 diabetes (T2D). Various surgery procedures are can be performed to induce weight loss. The most striking anti-diabetic effects are observed with biliopancreatic diversion with duodenal switch (BPD-DS), followed by Roux-in-Y gastric bypass (RYGB) and sleeve gastrectomy (SG). The first two procedures induce both a restriction of energy intake and a low absorption of dietary fatty acids while the latter exclusively targets energy intake restriction. The investigator and others have shown that improvement of T2D occurs within days after BPD-DS or RYGB in the vast majority of patients, prior to any significant weight loss. This very rapid metabolic recovery is explained by a normalization of ?-cell function after meal challenges and ameliorated hepatic insulin sensitivity. The investigator and others have shown that these acute anti-diabetic effects are mostly recapitulated by matched caloric restriction, independent of changes in gastrointestinal hormones, showing the importance of gastrointestinal-derived energy fluxes for acute diabetes control. Muscle insulin sensitivity, on the other hand, improves more slowly in association with weight loss, demonstrating the heterogeneous metabolic response of the various organs to BPD-DS. Some preliminary studies also demonstrate a rapid reduction of NEFA levels and production rate upon i.v. administration of lipids during euglycemic hyperinsulinemic clamps. This very rapid improvement in NEFA tolerance strongly suggests that adipose tissue storage of circulating fatty acids also improves very rapidly, prior to any significant weight loss, after BPD-DS. It may also suggest an acceleration of oxidative fatty acid metabolism in organs such as the liver, the heart and/or skeletal muscles. Studies of the rapid metabolic changes after bariatric surgery conducted thus far rapidly improved the understanding of the fundamental pathogenic defects of T2D. However, much remains to be understood about the acute changes in gastrointestinal-derived metabolic fluxes, organ-specific metabolic responses to bariatric surgery and their relationship with the reversal of T2D. Using in vivo methodological approaches, the investigator proposes to investigate the early organ-specific changes in dietary fatty acid metabolism in response to BPD-DS vs. SG and their relation to improved systemic changes in glucose homeostasis, insulin sensitivity and ?-cell function in patients with T2D.

Start: August 2015
Study of the Psychological Profile of Type 2 Diabetic Patients With Foot Wounds, Compared to Diabetic Patients Without Foot Wounds

Several studies have highlighted the value of analyzing a patient's psychological profile with the Bortner scale questionnaire (defined as type A or B personality). This analysis helps to better understand and anticipate patients' behaviour, stress and compliance with their disease and its progression. The Type A personality profile combines hyperactivity, competitiveness and exaggerated ambition, while the B profile is characterized by lower sensitivity to stress and reduced competitiveness. It has been shown that the type B psychological profile in patients with type 2 diabetes is an independent risk factor for inflammation and that, in type 1 diabetes, the type A psychological profile is associated with a decrease in the expression of the pro-inflammatory cFos gene. Thus, the psychological profile appears to have an impact not only on the patient's behaviour but also on his or her biology. It has never been determined whether the type A or B psychological profile assessed by Bortner's self-administered questionnaire can influence the development of foot wounds in patients with type 2 diabetes who often have a medically unfavourable prognosis and socio-economic difficulties. We would therefore like to study the psychological profile of these individuals in order to make comparisons with the data obtained in a previous study that included patients with type 2 diabetes who did not have a foot wound.

Start: December 2019