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Effects of Leptin Treatment on Weight Loss



Effects of Leptin Treatment on Weight Loss

For Condition: Obesity
Status: Recruiting
Sponsor(s): Rockefeller University ,
Synopsis: This is a double blind placebo controlled clinical study designed to determine the effects of leptin on the changes that occur in the body during weight loss achieved by a very low calorie diet.
Details: Leptin is a hormone that is produced by the fat tissue and acts on the brain. Leptin plays a key role in regulating energy balance and body weight in animals and in humans. When a person loses weight leptin concentration in the blood is reduced. Reduction in blood leptin levels has been found to be related to a decreased metabolic rate (the rate in which the body burns its calories), an increased appetite, and to many other physiological and hormonal changes that may lead to failure in dieting. This study is aimed to test if maintaining leptin in the pre-diet level range will ameliorate the changes that occur in the body during weight loss. If these changes are reduced the process of weight loss could be easier and faster when adhering to a low calorie diet. In this study leptin or placebo are administered by an injection under the skin, in a way that is similar to injections of insulin to diabetic patients. 50% of the subjects participating in the study are treated by leptin and 50% are treated by placebo. Blood leptin levels are maintained in the pre-diet range in leptin treated subjects by leptin treatment. Subject’s treated by placebo will also lose weight if they adhere to the liquid diet provided by The Rockefeller University Bio-nutrition Department. The investigators and the participants don’t know if leptin or placebo are used since this is a double blind study. To participate in this study subjects have to stay at The Rockefeller University Hospital as inpatients for about two months and continue the study as outpatients for 4 more months. During the outpatient period subject have to attend a clinic visit once a week. During the first 3 weeks of the study subjects are introduced to a weight stabilization liquid diet. During this time the initial weight is maintained and baseline study tests are performed. When testing is completed a very low calorie liquid diet and leptin or placebo administration are initiated. Weight is monitored until 10% weight loss is achieved. At this time a second testing period is performed in an inpatient setting. When testing is completed weight loss and leptin or placebo treatment continue at home in an outpatient setting until 20% weight loss is achieved. When this period is completed a third testing period is performed in an inpatient setting. The last month of the study is dedicated to a transition from the liquid diet to solid food, and to weight maintenance education provided by the hospital staff in an outpatient setting. A solid food weight maintenance diet is provided to participants during this period. At the end of this period two days of testing are performed and leptin/placebo administration is discontinued. Study testing periods are performed over 12 days in an inpatient setting and include a variety of blood draws, urine collection, metabolic and behavioral tests that are known to be affected by a weight loss.
Eligibility:
Study Type:  Interventional, Treatment, Randomized, Double-Blind, Placebo Control, Expanded Access Assignment, Efficacy Study
Minimum Age/Maximum Age: 20 Years/45 Years
Genders: Female
Protocol Entry Criteria: Healthy overweight women BMI 29-45 no other acute or chronic illnesses
Total Enrollment: 40

Location and Contact Information:

Rockefeller University Hospital *Recruiting*
New York City,  New York,  10021
United States
Recruiting Lanie  Fleischer 800-872-2737


Additional Information:
Study ID Numbers:  JFN 0357; 
Study Start Date: March 2001
Record last reviewed: November 2003
Additional information available at: clinicaltrials.gov
Clinicaltrials.gov Reference link: NCT00050791

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