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121 active trials for Weight Loss

Delicious Eating for Life in Southern Homes

This study will compare a new weight loss program that focuses on a healthy eating pattern, with WW™ (formally Weight Watchers), an effective and widely available weight loss program. Study researchers have developed an adapted version of the Mediterranean eating pattern to be more acceptable and realistic for southerners; this adapted version is known as "Med-South." Those who take part in the study will be randomly assigned to either the Med-South weight loss program or WW™. Both programs will last for 2 years with measurement visits at the start of the study and at 4-, 12- and 24-month follow-up. While the primary outcome measured by the trial will be weight loss at 24 months, researchers will collect other data which may show additional health benefits of the Med-South diet. The study team will measure blood markers of inflammation, which are known to improve with better diet quality. Researchers will also measure participants' skin carotenoid levels, which increase with greater fruit and vegetable consumption. The study will be conducted within 2 regional catchment areas (n=360 participants) representing a diverse spectrum of patients and settings. Patients with a BMI ? 30 kg/m^2 will be enrolled and randomized to intervention or augmented usual care. To assure adequate subgroup representation, ? 40% of the sample will have diabetes, ? 40% will be male, and ? 40% will be African American. The intervention will be delivered in 3 phases over 24 months by research staff: Phase I (4 months) focuses on adopting a Med-style dietary pattern; Phase II (8 months) on weight loss; and Phase III (12 months) on weight loss maintenance. Outcomes will be assessed at 4, 12, and 24 months. The primary outcome is weight loss at 24 months. Secondary outcomes include change in physiologic, behavioral, and psychosocial measures. Researchers will also assess implementation cost and the incremental cost-effectiveness of the intervention relative to the augmented usual care group.

Start: July 2020
Does Meal Replacement With a Carbohydrates and Protein Supplement Induce Weight Loss in Overweight and/or Obese Adults?

Participants will be randomized into two groups, one group will be the control (no intervention at all) and the other will be CHO-PRO (meal replacement, Generation UCAN supplement, 400ml, 20% solution). Prior to the start of the experiment, all participants will be asked to record their satiety ratings, appetite and desire to eat (10-point visual analogue scale) 30, 60 and 120 minutes after their regular dinner for 3 days. On the first day of the experiment, all participants will be asked to measure their waist and hip circumferences, fasting blood glucose level, maximal number of pushups and body weight using a scale at home prior to breakfast. Instructions on how to do the measurements properly will be recorded in a video and distributed to the participants. Participants in the control group will not receive any intervention. Participants in the CHO-PRO group will be provided with the supplement and they will be asked to consume the CHO - protein supplement (Generation UCAN supplement, 250ml, 10% solution) 6 to 7 hours after lunch, in place of their dinner for 6 weeks. They will also be asked to record their satiety ratings, appetite and desire to eat (10-point visual analogue scale) 30, 60 and 120 minutes after each meal replacement drink. All participants will be required to complete a dietary record, prior to, and during (at weeks 2 and 4) intervention. To track adherence of the CHO-PRO group, participants will be asked to check off the calendar that they did not consume the meal replacement due to various reasons. On day 43, all participants will be asked measure again waist and hip circumferences, fasting blood glucose level, maximal number of pushups and body weight using a scale at home prior to breakfast again.

Start: August 2020
Project Activate: Mindfulness and Acceptance Based Behavioral Treatment for Weight Loss

Mindfulness and Acceptance based Behavioral Therapies (MABTs) are among the most promising behavioral approaches for obesity, with two recent large trials showing that they achieve better initial weight loss and/or better weight loss maintenance than does gold standard BT. However, results vary, potentially due to inconsistencies in how MABT components are utilized and emphasized. Optimizing MABTs using a typical approach, i.e., successive randomized controlled trials of various MABT packages, is slow and difficult. Multiphase Optimization Strategy (MOST) has been developed as a better method of optimizing treatment. Consistent with Phase I of MOST, we derived three MABT components from the theoretical literature. Evaluation of MABT components through a factorial design (MOST Phase II) will allow us to determine the independent and interacting efficacies of each MABT component, in addition to the identification of subsets of individuals most or least responsive to each component. Whereas mediational analyses have been inconclusive, the use of a factorial design will allow for a critical test of the main and interaction effects of individual MABT treatment components. The current study will use a full factorial design to identify the independent and combined effects of three core MABT components (Awareness, Acceptance, and Values Clarity) as additions to weight loss counseling. Moderators of treatment outcome (disinhibited eating, food cue susceptibility, emotional eating, delay discounting, and inhibitory control), and mediator/process variables implicated in MABTs (mindful eating, acceptance of food cues, mindfulness, body responsiveness, autonomous motivation, values clarity, hunger/satiety perceptions, and motivation and pleasure resulting from social functioning) will be assessed as well.

Start: August 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