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61 active trials for Pediatric Obesity

An Addiction-Based Mobile Health Weight Loss Intervention With Coaching

New and creative approaches are needed to address childhood obesity. Current strategies result in suboptimal outcomes and are intensive and costly. It has been theorized that overeating, may have addictive qualities, although few weight management interventions have tested therapeutic techniques founded on addiction medicine principles, such as, withdrawal, tolerance and craving control1, 2. A pilot study utilizing an addiction model based mobile health (mHealth) weight-loss intervention in adolescents showed that the app intervention reduced BMI Z-score (zBMI) to a greater extent than youth participating in an in-clinic multidisciplinary weight management intervention, and appeared to be a cost-effective, labor efficient method for adolescent weight management. The proposed multi-site randomized control trial (RCT) will test the effectiveness of an addiction-based weight loss intervention, embodied first as a smartphone app with telephone coaching and second as an identical approach phone-coaching alone intervention compared to age matched controls participating in an in-clinic weight management interventions in a larger sample of economically, racially and ethnically diverse adolescents (ages 14-18). One hundred and eighty adolescents will be recruited from pediatric interdisciplinary weight management clinics operating out of five different hospital systems in Southern California and through targeted mailing to 40 ethnically, racially and economically diverse neighborhoods in Los Angeles County. The adolescents will be randomized 1:1 via stratified block randomization to either receive 1) interactive addiction model based mobile health (mHealth) weight-loss intervention with personalized phone-coaching (AppCoach), 2) interactive addiction model based mHealth weight-loss intervention alone (App) or 3) Multidisciplinary in-clinic weight management program (Clinic). Assessment of the intervention's effect on zBMI and percent over the 95th percentile (%BMIp95), fasting metabolic parameters, addictive eating habits, executive function, and motivation for change will be obtained at enrollment, 3, 6, 12 and 18 months (1 year post intervention follow up). In addition, a real-life economic analysis (cost, cost-saving and non-monetary benefits) analysis will be completed comparing AppCoach to 1) App and 2) Clinic. We will further explore whether primary and secondary outcomes differ by race and whether race moderates the relationship between initial intervention efficacy and prolonged weight maintenance.

Start: January 2019
Impact of Metabolic Surgery on Pancreatic, Renal and Cardiovascular Health in Youth With Type 2 Diabetes

Type 2 diabetes (T2D) in youth is increasing in prevalence in parallel with the obesity epidemic. In the US, almost half of patients with renal failure have DKD, and ?80% have T2D. Compared to adult-onset T2D, youth with T2D have a more aggressive phenotype with greater insulin resistance (IR), more rapid ?-cell decline and higher prevalence of diabetic kidney disease (DKD), arguing for separate and dedicated studies in youth-onset T2D. Early DKD is characterized by changes in intrarenal hemodynamic function, including increased renal plasma flow (RPF) and glomerular pressure with resultant hyperfiltration, is common in Y-T2D, and predicts progressive DKD. Studies evaluating the two currently approved medications for treating T2D in youth (metformin and insulin) have shown these medications are not able to improve ?-cell function over time in the youth. However, recent evidence suggests that bariatric surgery in adults is associated with improvements in diabetes outcomes, and even T2D remission in many patients. Limited data in youth also supports the benefits of bariatric surgery, regarding weight loss, glycemic control in T2D, and cardio-renal health. While weight loss is important, the acute effect of bariatric surgery on factors such as insulin resistance likely includes weight loss-independent mechanisms. A better understanding of the effects of bariatric surgery on pancreatic function, intrarenal hemodynamics, renal O2 and cardiovascular function is critical to help define mechanisms of surgical benefits, to help identify potential novel future non-surgical approaches to prevent pancreatic failure, DKD and cardiovascular disease. The investigators' overarching hypotheses are that: 1) Y-T2D is associated with IR, pancreatic dysfunction, intrarenal hemodynamic dysfunction, elevated renal O2 consumption and cardiovascular dysfunction which improve with bariatric surgery, 2) The early effect of bariatric surgery on intrarenal hemodynamics is mediated by improvement in IR and weight loss. To address these hypotheses, the investigators will measure GFR, RPF, glomerular pressure and renal O2, in addition to aortic stiffness, ?-cell function and insulin sensitivity in youth ages 12-21 with T2D (n=30) before and after vertical sleeve gastrectomy (VSG). To further investigate the mechanisms of renal damage in youth with T2D, two optional procedures are included in the study prior to vertical sleeve gastrectomy: 1) kidney biopsy procedure and 2) induction of induced pluripotent stem cells (iPSCs) to assess morphometrics and genetic expression of renal tissue.

Start: October 2018