Studies of Biological Changes Related to Weight Loss After Gastric Bypass Surgery

August 27, 2009 updated by: Rockefeller University

A Gene Expression and Metabolic Profile of Weight Loss: Studies of Patients Following Gastric Bypass Surgery

Weight loss achieved by dieting induces multiple changes. These changes include a decrease in metabolic rate (the rate in which the body burns its calories), an increase in appetite and other physiological and hormonal changes that may be the cause of failure in dieting. Many of these parameters that have never been evaluated when weight is lost after gastric bypass surgery will be tested in this study.

Study Overview

Status

Terminated

Conditions

Intervention / Treatment

Detailed Description

While gastric bypass surgery (GBS) is known to be highly effective in achieving significant weight loss, it is also associated with other biologic changes that occur in the body when weight is lost. In this study, subjects undergoing gastric bypass surgery will be followed throughout the weight loss period. They will undergo four detailed medical evaluations to assess changes in several biological systems that occur in the body when weight is lost.

The initial assessment will be performed before the surgery (testing period 1). After surgery is completed, subjects will attend clinic visits at the Rockefeller University outpatient clinic. During these visits, weight and leptin levels will be monitored. Two additional assessments will be performed during weight loss, when subjects lose 10% and 20% of their initial weight (testing periods 2 and 3 respectively). A final evaluation will be performed after weight is stabilized, about 18 months after the surgery is completed (testing period 4). Each testing period will be performed over a 2 week period in an inpatient setting at the Rockefeller University Hospital. During testing periods subjects will undergo a series of metabolic, behavioral, hormonal, immune and molecular tests to evaluate changes that occur in the body after weight loss. Subjects will receive monetary compensation for participating in the study.

Study Type

Observational

Enrollment (Anticipated)

13

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New York
      • New York, New York, United States, 10021
        • St. Luke's Obesity Research Center, NY NY 10023 and New York Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Inclusion Criteria:

  • 18 - 65 years old
  • Subjects approved for gastric bypass surgery

Description

Inclusion Criteria:

  • 18 - 65 years old
  • Subjects approved for gastric bypass surgery

Exclusion Criteria:

  • Subjects not approved for gastric bypass surgery

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Rockefeller University

Collaborators

New York Obesity and Nutrition Research Center

Investigators

  • Principal Investigator: Jeffrey M. Friedman, MD, Rockefeller University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

July 1, 2007

Study Registration Dates

First Submitted

July 11, 2005

First Submitted That Met QC Criteria

July 11, 2005

First Posted (ESTIMATE)

July 18, 2005

Study Record Updates

Last Update Posted (ESTIMATE)

August 28, 2009

Last Update Submitted That Met QC Criteria

August 27, 2009

Last Verified

August 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • JFN 0385

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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