Changes in Ectopic Fat Following Surgically Induced Weight Loss

November 17, 2017 updated by: Ildiko Lingvay, University of Texas Southwestern Medical Center

Changes in Ectopic Fat Following Surgically Induced Weight Loss: Does it Explain the Resolution of Diabetes?

This study evaluates how ectopic fat (in the pancreas, heart, liver and skeletal muscle), visceral fat, and subcutaneous fat changes following surgically induced weight loss using gastric banding. The investigators also evaluate whether changes in pancreatic fat content correlate with improvement in beta-cell function.

Study Overview

Status

Completed

Conditions

Detailed Description

We are looking for volunteers for this study,wich involves 7 visits over a period of 13 months, the first visit taking place about 2 weeks prior to the planned surgery.

Visit 1 - baseline, before starting your pre-operative diet Visit 2 - just before the surgery Visit 3 - around the time your first band inflation occurs Visit 4 - 1 month after the band inflation Visit 5 - 3 months after the first band inflation Visit 6 - 6 months after the first band inflation Visit 7 - 12 months after the first band inflation

At each visit we do the following tests:

  1. MRS to measure your fat in the liver, pancreas, heart, muscle (leg), subcutaneous fat and visceral fat.
  2. Frequently sampled intravenous glucose tolerance test - it is a 3.5 hrs test which determines the amount of insulin your body produces and how well your own insulin is being used by the body
  3. Body measurements (waist, hip circumference), cholesterol panel, liver function tests, HbA1c (to monitor diabetes control), blood pressure, weight.

We also do an oral glucose tolerance test to check for diabetes on 3 occasions: visit 1, visit 5 and at the end, visit 7.

Study Type

Observational

Enrollment (Actual)

20

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
    • Texas
      • Dallas, Texas, United States, 75390
        • University of Texas Southwestern

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 and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients already scheduled to undergo gastric banding within 1-2 months.

This study does NOT pay for the bariatric surgery, eligible participants must already be scheduled to have the surgery performed by their own physician

Description

Inclusion Criteria:

  • Greater than 18 years old
  • Fully understanding and willing to undergo study procedures
  • Available for follow-up
  • Understand and willing to sign informed consent
  • Pharmacologic agents with the potential to change ectopic fat content (i.e. pioglitazone) are allowed if the patient has been on a stable dose for at least 3 months and plans to continue the same dose for the duration of the study

Exclusion Criteria:

  • Contraindication to MRI (i.e. metallic implants, severe claustrophobia, weight above 320lb)
  • Contraindication to phlebotomy (i.e. no accessible veins, hemoglobin <10 mg/dL)
  • History of pancreatic disease other than diabetes
  • Regular use of more than 2 alcoholic drinks per day
  • Pregnancy
  • Non-English speaking

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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Pancreatic and Liver Triglyceride (Fat) Content
Time Frame: months after the first band inflation
Pancreatic triglyceride (fat) content measured by the magnetic resonance spectroscopy (MRS) technique in volunteers with a wide range of body mass index (BMI).
months after the first band inflation

Collaborators and Investigators

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

Sponsor

University of Texas Southwestern Medical Center

Collaborators

National Institutes of Health (NIH)

Investigators

  • Principal Investigator: Ildiko Lingvay, MD, MPH, University of Texas Southwestern Medical Center

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

August 1, 2008

Primary Completion (Actual)

December 1, 2012

Study Completion (Actual)

December 1, 2012

Study Registration Dates

First Submitted

February 6, 2009

First Submitted That Met QC Criteria

February 9, 2009

First Posted (Estimate)

February 10, 2009

Study Record Updates

Last Update Posted (Actual)

December 13, 2017

Last Update Submitted That Met QC Criteria

November 17, 2017

Last Verified

November 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 072008-039
  • NIH Grant: 1K23RR024470-01

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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