Obesity Clinical Trials

The main objective of this study is to establish a national pediatric obesity registry known as POWER (Pediatric Obesity Weight Evaluation Registry). This registry will contain clinical data from individual comprehensive pediatric weight management programs around the United States for overweight and obese youth. Read Less

Glucagon like peptide (GLP-1) agonists, such as liraglutide, exenatide, and semaglutide, have been increasingly used as a medication to address the current twin epidemics of diabetes and obesity. Their activities include increasing insulin production by pancreatic beta cells, improving insulin sensitivity in muscles and weight loss. The mechanisms underpinning the weight loss caused by GLP-1 agonists have not yet been fully elucidated, but brown adipose tissue (BAT) appears to play an important role. We propose to assess BAT activity, using infrared thermography camera images, before individuals start weekly administration of semaglutide, at week 2-4, and week 18-20. We hypothesize that this GLP-1 agonist, semaglutide, will cause an increase in BAT activity and a corresponding increase in basal metabolic rate. Read Less

Prolonged sitting (sedentary behavior) is a risk factor for decreased kidney function, obesity, diabetes and mortality. Prolonged sitting is associated with decreased kidney function and increased risk of diabetes, heart disease and death. In a previous pilot study funded by NIH, it was shown that a Sit Less, Interact and Move More (SLIMM) intervention targeting sedentary behavior in people with kidney disease was able to decrease prolonged sitting but that effect was not sustained. Therefore, the researchers are currently conducting a follow-up study named Sit Less, Interact and Move More (SLIMM) 2. This NIH funded study is conducted at the University of Utah and Stanford University. The purpose of this study is to see if guided resistance training (to improve muscle strength) and semaglutide (FDA approved diabetes and weight loss medication that might also improve physical function) can boost adherence to the SLIMM Intervention and reduce sedentary behavior. Read Less

The overall goal of this proposal is to investigate effects of obesity on pharmacokinetics of immunoglobulin G (IgG) and to develop strategies for optimization of dosing of IgG in obese patients. There is an ongoing debate regarding the most appropriate dosing of IgG formulations in obese patients. Obesity poses significant health risks; and evidence supporting dosing strategies of IgG in obese patients is inadequate. Some of the adverse reactions have been attributed to a relative overdosing in these patients, due to a limited distribution of IgG into fat tissue. Read Less

The overall objective of this application is to investigate the effects of obesity on lung function, exercise tolerance, and DOE in older obese adults as compared with older adults without obesity, using a novel probe for mechanically unloading the thorax at rest and during exercise. The investigators will use 1) continuous negative cuirass pressure, and 2) assisted biphasic cuirass ventilation to decrease obesity-related effects in older obese adults. Our approach will be to examine respiratory function, exercise tolerance, and DOE with and without mechanical unloading in older obese men and women (65-75 yr), including those with respiratory symptoms (defined by a score of 1 or 2 on the modified Medical Research Council Dyspnea Scale), as compared with older adults without obesity. Specific Aims: The investigators will test the following hypotheses in older adults with and without obesity: Aim 1) Obesity will decrease respiratory function but to a greater extent in older obese adults with respiratory symptoms, (as evidenced by altered pulmonary function and breathing mechanics at rest); Aim 2) Obesity will decrease exercise tolerance (as evidenced by peak V•O2 in ml/min/kg, i.e., physical fitness), but not cardiorespiratory fitness (as evidenced by peak V•O2 in % of predicted based on ideal body wt), except in older obese adults with respiratory symptoms where both may be reduced during graded cycle ergometry. Aim 3) Obesity will increase DOE but to a greater extent in older obese adults with respiratory symptoms as evidenced by increased ratings of perceived breathlessness (sensory & affective dimensions) during exercise. Aim 4) Mechanical unloading of the thorax will improve respiratory function, submaximal exercise tolerance, and DOE in older obese adults, but to a greater extent in older obese adults with respiratory symptoms. Read Less

This is a single-center, prospective, randomized, controlled (crossover) clinical study designed to investigate the specific dose-response impact of insulin infusion rate (IIR) on blood glucose levels during a pancreatic clamp study. The investigators will recruit participants with a history of overweight/obesity and evidence of insulin resistance (i.e., fasting hyperinsulinemia plus prediabetes and/or impaired fasting glucose and/or Homeostasis Model Assessment of Insulin Resistance [HOMA-IR] score >=2.73), and with evidence of, or clinically judged to be at high risk for, uncomplicated non-alcoholic fatty liver disease (NAFLD). Participants will undergo two pancreatic clamp procedures in which individualized basal IIR are identified, followed in one by maintenance of basal IIR (maintenance hyperinsulinemia, MH) and in the other by a stepped decline in IIR (reduction toward euinsulinemia, RE). In both clamps the investigators will closely monitor plasma glucose and various metabolic parameters. The primary outcome will be the absolute and relative changes in steady-state plasma glucose levels at each stepped decline in IIR. Read Less

The aim of this mixed methods, single-group, single-center study will be to examine the feasibility of a food response training (FRT). This study will be conducted in patients with obesity recruited from NYU Langone Health. Measurements will occur at screening, baseline, and 3 months, for a subgroup of participants for we will collect saliva samples for genetic analysis at baseline assessment (ancillary study). Read Less

Primary care settings lack interventions to address the childhood obesity epidemic that are feasible and sustainable without requiring significant resources. The investigators propose to modify and test an intervention shown to lower children's body mass index(BMI) so that it is feasible, sustainable, and easily disseminated in a real-world clinical setting. If successful, the investigators will be able to provide recommendations to providers and health care systems that help prioritize future intervention strategies and research investments to reduce obesity in children that can be quickly translated into other settings and widely adopted after the study period, with the goal of halting and reversing the childhood obesity epidemic. Read Less

The objective of the proposed double-blind, parallel-arm, randomized clinical trial is to evaluate changes in body weight and composition, assess determinants of energy balance (intake and expenditure), and measure modulators of energy balance, following 8 wk of calorie restriction (-500 kcal/d) in combination with either overnight exposure to normobaric hypoxia (8 h/night, 15% FiO2, ~2640 m) or normoxia (8 h/night, 21% FiO2), using a commercially available, in-home tent system, in adults with obesity. Read Less

The aims of this randomized controlled trial are to determine the effects of a lifestyle program that supports weight maintenance and fat mass loss during pregnancy in women with obesity on changes in 1) maternal weight, fat mass, and cardiometabolic risk factors; 2) safety measures, including fetal and neonatal growth; 3) the mediators and moderators of the fat mass loss intervention and 4) the effects gestational fat mass loss has on reducing incidence of adverse obstetrical outcomes, including non-elective cesarean delivery, gestational diabetes, hypertension, and pre-eclampsia. Read Less

The purpose of this study is to find out if receiving education regarding increased risks of cardiometabolic disease helps subjects understand these risks and how these risks participants' health. Read Less

The purpose of this study is to establish and follow longitudinally a cohort of ethnically diverse pregnant women and their offspring, in order to explore the hypothesis that fetal over-nutrition is associated with obesity, metabolic, and cardiovascular abnormalities in the offspring. Read Less