Clinical Research Directory

A Multicenter Pharmacoepidemiological Cohort on Real Life Use of Semaglutide in Adolescents or Adults With Monogenic Obesity

Rare genetic forms of obesity, so called monogenic obesity are linked to alteration in energy balance involving hypothalamic pathways. More than 60 genes encoding for proteins located in the hypothalamic leptin/melanocortin pathway have been described in the French National Protocol for Diagnostic and Care (PNDS). While pathogenic and likely pathogenic variants in these genes are well-established causes of monogenic obesity, current evidence supports a broader genetic architecture of obesity, better understood as a continuum ranging from rare high-impact variants to polygenic susceptibility. Variants of uncertain significance (VUS) as well as variants currently classified as benign or likely benign are frequently identified in clinical practice, and their classification may evolve over time as genomic databases expand and functional data accumulate In addition, polygenic background may interact with rare variants and contribute to the severity of the phenotype, disease progression, and therapeutic response. The natural history of monogenic obesity is characterized by an early onset in childhood, with a major increase in weight in adolescence and young adulthood. The worsening of obesity exposes these patients to severe complications. Severe obesity and eating disorders have a major impact on the quality of life of the person but also of the family and caregivers. Clinical management is complex and requires comprehensive, specialized and multidisciplinary management. The usual lifestyle approaches have so far shown disappointing results, similarly to bariatric surgery which leads to a more frequent weight regain in the situation of monogenic obesity, justifying new approaches. In this context, evaluating the response to treatment in the particular condition of monogenic obesity is crucial to propose therapeutic options as early as possible to limit weight evolution and its complications. GLP-1 (glucagon-like peptide 1) based innovative therapies have recently emerged as a promising option for treatment of obesity and its complications. This is the case for Semaglutide marketed as OZEMPIC® and WEGOVY®, developed by Novo Nordisk. However, there is a lack of data to confirm that semaglutide could be also effective in monogenic obesity. The aim of the ObGeSema project is to set up a cohort composed of patients (1) having already initiated a treatment and (2) newly treated by Semaglutide in 21 pediatric and adult Specialized Obesity Centres (CSOs) and describe their evolution over a 4 years follow-up.

A Study Evaluating Mibavademab Treatment of Obesity Due to Leptin (LEP) Gene Mutations in Children, Adolescents and Adults

This study is researching an experimental drug called mibavademab. The study is focused on patients with a condition called monogenic obesity. Monogenic obesity is caused by a change in the leptin gene that keeps it from working properly. This causes the body to not be able to feel full or control feelings of hunger. The aim of the study is to see how well mibavademab controls the body weight and how safe it is. The study is looking at several other research questions, including: * How much mibavademab is in the blood at different times * Whether the body makes proteins called antibodies against mibavademab (which could stop mibavademab from working as well or could lead to side effects) * What side effects may happen from taking mibavademab

Efficacy of Semaglutide s.c. Once-weekly on Weight Loss and Management in Adolescents With Monogenic Obesity in Clinical Practice

This observational study aims to assess the effect of once-weekly s.c. semaglutide 2.4 mg as an adjunct to a calorie-reduced diet and increased physical activity on weight loss, change in hunger, body composition, depression, and quality of life after 68 weeks of treatment in adolescents diagnosed with monogenic obesity in routine clinical care.