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1,029 active trials for Obesity

First Research Study to Look at How Two Medicines, NNC0480-0389 and Semaglutide, Work Together in Healthy People, in People With High Body Weight and in People With Diabetes

The purpose of this study is to investigate how safe, and how well tolerated, the new study drug NNC0480-0389 is when it is given together with semaglutide. This will be investigated in healthy participants, participants with high bodyweight and participants with type 2 diabetes (T2D). NNC0480-0389 has not been given to humans before. It has been previously tested in the laboratory and on animals. NNC0480-0389 will be tested at various dose levels. Semaglutide is a new approved drug and is already available on the market for treatment of diabetes. It will also be investigated how quickly and to what extent NNC0480-0389 and semaglutide are taken up and eliminated from the body. This is called pharmacokinetics. The effect of NNC0480-0389 given together with semaglutide will also be investigated on body weight and glucose levels in the blood. This is called pharmacodynamics. The effects of NNC0480-0389 and/or semaglutide will be compared to the effects of a placebo. A placebo is a "dummy" medicine without any active medicine. Placebo looks like NNC0480-0389 and/or semaglutide. There are 4 possibilities for which treatment participants will get; participants will receive NNC0480-0389 and semaglutide or NNC0480-0389 and placebo or placebo with semaglutide, or placebo with placebo. Participants and the responsible doctor will not know which combination participants will be given. This is called a double-blinded study. However, this information can be looked up during the study if it is important for participants' health. The study medicines will be given as injections under the skin. Participants will be in the study for about 25 weeks.

Start: February 2020

Intermittent Fasting Adherence and Self Tracking

This pilot study will randomize 34 patients with hypertension and obesity to either time-restricted feeding alone or a commitment device to encourage time-restricted feeding, including a commitment pledge, involvement of a supportive partner, setting of implementation intentions, and multiple daily reminder text messages. The intervention will last 12 weeks, followed by a 6-week follow-up period. The primary outcome is adherence to the IF regimen, captured via daily text message, over 18 weeks

Start: June 2021

Community Activation for Prevention (CAPs): A Study of Community Gardening

The investigators previous studies show that community gardening is associated with reduction of key health behaviors for cancer prevention in diverse populations. Community gardeners eat more fruits and vegetables per day, are more physically active, and are more likely to avoid age-associated increase in body mass index (BMI). The effect is partially explained by the finding that gardeners are more socially involved, and feel more social support than non-gardeners. The investigators propose a randomized controlled trial to determine whether community gardening improves cancer-preventive behaviors among a multi-ethnic, low-income adult population and elucidate the pathways that shape cancer-preventive behaviors. A randomized controlled trial is needed to demonstrate that the observed behavioral differences are due to the effect of gardening as an intervention rather than self-selection by gardeners.

Start: January 2017

Underlying Mechanisms of Obesity-induced Obstructive Sleep Apnea

Obesity is a common risk factor for the development of obstructive sleep apnea. However, not all subjects with obesity develop obstructive sleep apnea. This study will attempt to determine the mechanistic drivers between obesity and obstructive sleep apnea.

Start: March 2021

Self-monitoring Activity: a Randomized Trial of Game-oriented Applications

The purpose of this study is to compare an enhanced intervention that includes narrative and game components to a standard intervention that only targets self-monitoring. These approaches will be tested among postmenopausal breast cancer survivors who are sedentary and overweight.

Start: February 2015

Metabolic Flexibility, Gut Microbiota, Healthy Diet and Exercise in NAFLD on Genetics Base

Nonalcoholic fatty liver disease (NAFLD) is associated to obesity, metabolic syndrome and genetic predisposition: specific variants of the genes PNPLA3 and TM6SF2 are the most involved. Also biochemical mechanisms that affect the "metabolic flexibility" need to be better clarified. It is known that a dietary intervention, accompanied by a physical personalized training, reduce either the hepatic fat content either insulin resistance. Therefore, the aim of the study is to evaluate "metabolic flexibility" in obese NAFLD subjects taking in account the presence or absence of PNPLA3 and TM6SF2 polymorphism and the histopathological diagnosis of either simple steatosis or nonalcoholic steatohepatitis (NASH). The composition of gut microbiota will be also evaluated. Finally, two distinct healthy dietary profiles accompanied by a personalized physical training, will be tested to comprehend whether and how "healthy diets" could operate in the clinical treatment of NAFLD and related conditions.

Start: October 2016

Remote Delivery of Weight Management for Adults With IDD

The purpose of this study is to compare different weight loss programs in people with IDD to see which program works better.

Start: February 2018

Effects of a Single Bout of Exercise on Transcriptomics and Metabolomics in Adipose Tissue

The purpose of this study is to determine the effects of a single bout of exercise on changes in the genes and small molecules in blood and fat tissue, before and after a bout of exercise. This research may contribute to a better understanding of the beneficial effects of exercise on the body.

Start: May 2021

Asthma and Obesity: Pilot Study

Develop and pilot test four theory-based educational modules that integrate counseling for asthma and obesity to promote greater physical activity among people with asthma.

Start: October 2019

Activation of Brain Centers by Short-term Walnut Consumption in Obesity

The purposes of the study are: Study Aim 1. To assess the mechanisms underlying the biological effects of short-term walnut consumption on appetite with functional magnetic resonance imaging (fMRI) and assessing neurocognitive function/memory Study Aim 2. To investigate the effects of walnut consumption (48g per day over 5 days) on appetite and satiety by analyzing molecules which regulate energy homeostasis such as adipokines, as well as resting metabolic rate which measures energy expenditure. Study Aim 3. To investigate the effects of walnuts (48g per day over 5 days) on insulin resistance, lipids, and inflammatory markers in obesity as well as the effect of walnuts when consumed as part of a mixed meal, on glucose excursions, insulin secretion and the excretion of gut peptides and free fatty acids.

Start: January 2016

Effect of Fasting and Calorie-Restricted Diets on Dopamine and Serotonin Levels Among Obese Women With BED and FA

Obesity presents a substantial economic burden in Jordan. Binge eating disorder (BED) and food addiction (FA) are the most common eating disorders associated with obesity. BED and FA most therapeutic approach is cognitive-behavioral therapy. Dopamine (DA) and serotonin (5HT) the major neurotransmitter responsible for FA and BED. Daily calorie restriction (CR) and intermittent calorie restriction (ICR) are two forms of diet therapy that can help weight loss. Prolong fasting increases lipolysis and elevates ketones bodies' levels in the brain led to a significant increase in the DA and 5HT. No prior human research has examined the effect of ICR (model 8:16) on DA and 5HT levels and weight reduction on obese with BED and FA. Therefore, A Randomized, controlled trial of 6 weeks follow-up will be used. A sample of 100 obese women will be selected to be randomly assigned to daily CR or ICR, or control group without FA or BED for a period of 6 weeks. Participants will be undergoing nutrition assessment, Anthropometrics assessment, food Addiction assessment (YFAS), binge eating assessment (BEDS-7), and hormonal level (DA&5HT) at baseline and after 6 weeks. The investigators anticipated that CR and ICR (model8:16) will significantly induce DA&5HT level changes and that ICR (model8:16) will be significantly more effective than CR in reducing BED & FA.

Start: June 2021

Tailoring Mobile Health Technology to Reduce Obesity and Improve Cardiovascular Health in Resource-Limited Neighborhood Environments

Background: Heart disease is a leading cause of death. People can reduce their heart disease risk by exercising more. Mobile health technology may make people more successful at increasing their exercise. This includes things like physical activity monitors and smartphone apps. Objective: To find out if mobile health technology can increase physical activity. Eligibility: African American women ages 25-75 who: Are overweight or obese Live in certain areas near Washington, DC Are pre-diabetic Have a smartphone that can use the study app Design: At visit 1, participants will Answer survey questions. These may be about medical history, physical activity, and weight. They may also cover body image, health perception, and spirituality. Have body size measured and get blood tests Get a device to wear on the wrist. It will record physical activity and hours of sleep. Learn how to download and use the study mobile app For 2 weeks, researchers will collect data about participants physical activity. Then participants will have a study visit with additional blood tests. All participants will get messages from the app that encourage exercise. Some participants will get data from the app about exercise near their home or work. Some participants may get face-to-face coaching. Participants may get wireless devices. These measure body weight, blood pressure, and blood glucose. Participants can measure these at home and upload the data to the app for the study. Participants will have visits after 3 and 6 months. They will repeat the visit 1 tests.

Start: June 2018

Small Bowel Length and Bariatric Surgery Outcomes

The purpose of this study is to determine whether or not the total length of small intestine effects outcomes after bariatric surgery in a cohort of patients preoperatively and up to ten years postoperatively. Roux-en-Y gastric bypass and vertical sleeve gastrectomy will be the surgical groups in this study. We aim to determine if bowel length has a significant effect on long term weight loss or other nutritional deficiencies in this bariatric cohort.

Start: August 2016

Metabolism and Bariatric Surgery Study

The purpose of this study is to determine if diet-induced weight loss causes different changes in hormones that control appetite and glucose control than surgery-induced weight loss. The overall research plan is a non-randomized prospective study of 3 different weight loss (WL) interventions and a lean and an obese healthy control group.

Start: October 2017

Intermittent Calorie Restriction, Insulin Resistance, and Biomarkers of Brain Function

Background: - Insulin removes sugar from the blood to use for energy. Insulin resistance means that cells may not respond to insulin normally. It can lead to serious diseases. Researchers want to see how diet affects insulin resistance, weight, and brain chemicals related to Alzheimer s disease. Objectives: - To compare two forms of diet and their effects on insulin resistance and the brain. Eligibility: - Women ages 55 70 with insulin resistance. Design: This study requires 6 clinic visits over 9 12 weeks. Participants must fast before visits. Visit 1, screening: Medical history, physical exam, and blood and urine tests. Participants will get a wrist device to wear for 4 days. Visit 2: Weight and waist measurement. Blood drawn. Questionnaires and thinking tests. Lumbar puncture. Skin will be numbed and a needle inserted between bones in the back will remove <TAB>fluid. Participants will drink a nutrition shake. Blood will be taken 12 times over 4 <TAB>hours through a thin tube in <TAB>the arm. Brain MRI. Participants will lie on a table that slides in and out of a cylinder in a strong magnetic field. <TAB>They will have a coil on their head and may do tasks. Participants will get advice about healthy eating and be randomly put in one of 2 groups. One group will get <TAB>nutrition shakes to drink. Visits 3 5: Weight and waist measurements, vital signs, blood draw, and questionnaires. Between visits, participants will get a call or email to check how they are doing. Visit 6: Repeat of visit 1. Participants will wear the wrist device for 4 more days, have a follow-up contact, then the study is finished.

Start: June 2015

Effect of Quinine Hydrochloride in Overweight Population on Food Intake, Hunger and Gut Peptide Release

The worldwide increase in the prevalence of obesity is a cause of great concern. Pharmacological treatment options are being explored at the moment with a major focus on the hormones produced by the gastrointestinal tract which regulate hunger and satiation/satiety. Modulating the release of these hormones via bitter substances reduced appetite-related sensations and gastrointestinal motility in lean female volunteers. Intragastric administration of a quinine-solution has shown to decrease hunger sensations in healthy female volunteers. Now, we want to examine whether this effect is still seen in an overweight female population.

Start: October 2020

Investigating the Impact of Obesity on Pubertal Development in Girls

Background: Studies suggest that overweight girls may be developing breast tissue, and therefore starting puberty, earlier than normal weight girls. However, it is hard to distinguish breast tissue from fatty tissue. Researchers think that by using breast ultrasound, among other tests, they can do a better job of telling whether an overweight girl has breast tissue. This will help them understand if overweight girls are truly entering puberty before normal weight girls. Objective: To find out if overweight girls go through puberty earlier than normal weight girls. Eligibility: Healthy girls 8-14 years old who: Are normal weight or overweight Have some breast development Have not started their first period Design: Parents of participants will be screened over the phone. Most participants will have 1 visit. However, they can choose to have multiple visits within 4 weeks. The visit will include: Physical exam that includes examination of the breasts and genital area Breast ultrasound: A small hand-held device will be passed back and forth over the chest. It uses sound waves to create a picture of the breast tissue. Pelvic ultrasound: A small, handheld device will be passed back and forth over the lower belly. It uses sound waves to create a picture of the ovaries. Urine and blood test A special x-ray called a DXA to measure the amount of fat in the body: The participant will lie still on a table while the x-ray takes pictures of the body. X-ray of the hand: The picture will tell researchers how mature the participant s bones are. Participants may be asked to come back 6 months later to repeat these tests.

Start: December 2015

Effect of L-Citrulline Supplementation on NAFLD in Adolescents With Obesity

One of the comorbidities of obesity is nonalcoholic fatty liver disease (NAFLD). L-citrulline is a non-protein amino acid that has shown positive effects on the degree of fat retention and metabolic profile in NAFLD. The objective is to assess the effect of oral L-citrulline supplementation on liver function and nonalcoholic fatty liver in adolescents with obesity. A clinical study will be carried out in 40 adolescents (15-19 years) with obesity, they will be divided into a control group that will receive a placebo and an experimental group that will receive 6 g of l-citrulline per day for eight weeks.

Start: May 2021

Improving Quality of Life in Men and Women With Overweight or Obesity

The purpose of this study is to evaluate the effect of the Noom Healthy Weight Program, a digital behavior change weight loss intervention, on quality of life as measured both by self-report and objective measures, compared to a waitlist control condition.

Start: April 2021

Enhancing Sleep Duration: Effects on Children's Eating and Activity Behaviors-Renewal

Enhancing children's sleep may be a novel approach for prevention of obesity and cardiovascular (CV) disturbance. Observational studies with children demonstrate that short sleep increases risk of obesity and other CV risk factors. Randomized controlled trials with children 8-11 years old demonstrate that enhancing sleep duration leads to positive changes in eating and activity behaviors and weight status, particularly for children who enhance their sleep the most. Enhancing sleep may be particularly important for racial minority children and those from lower socioeconomic backgrounds given their increased risk for short sleep, obesity and CV risk factors. In this study two active obesity preventive interventions will be evaluated: a) enhancing sleep alone (Optimize Sleep [OS]), and b) enhancing sleep along with eating and activity behaviors that have demonstrated efficacy for obesity prevention and are implicated in self-regulatory pathways related to sleep (i.e., energy dense snack foods and beverages, TV viewing, and physical activity) (OS-Plus). Two hundred four children 6-11 years old who are primarily African American/black, primarily from low socioeconomic backgrounds, and who sleep < 9.5 hours/night into a 12-month study will be enrolled. Children will be randomly assigned to either OS or OS-Plus. Over the 6-month treatment phase, all children will attend an 8-session treatment; monthly phone contacts will occur during maintenance (6-12 months). Primary aim is to determine the efficacy of OS-Plus relative to OS on change in body mass index z-score (BMIz) at end of treatment. Secondary aims will assess efficacy of OS-Plus relative to OS on additional cardiometabolic risk factors, eating and activity behaviors. Exploratory aims will assess maintenance of effects at 12 months.

Start: March 2018