Muscle Protein Metabolism in Obesity

April 1, 2020 updated by: Lori R. Roust, Mayo Clinic

Regulation of Muscle ATP Synthase Beta Subunit Metabolism in Obesity

Obesity is associated with reduced adenosine triphosphate (ATP) turnover in skeletal muscle, a condition that can impair muscle metabolism. The proposed research will discover mechanisms responsible for decreased content in mitochondrial proteins as well as in protein β-F1-ATPase, which is directly responsible for ATP assembly, in the muscle of obese individuals. This research will further examine the effectiveness of interventions, such as increased plasma amino acid availability and exercise, to increase the rate of production of mitochondrial proteins as well as that of β-F1-ATPase in the muscle of obese individuals. The findings will help to develop appropriate interventions to improve muscle ATP turnover and metabolism in obese people.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Anticipated)

84

Phase

  • Phase 1

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
    • Arizona
      • Scottsdale, Arizona, United States, 85259
        • Mayo Clinic in Arizona

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 50 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion criteria:

  1. Body mass index (BMI): lean, 19-26 kg/m2; obese, 30-40 kg/m2
  2. Availability of transportation
  3. Ability to sign informed consent form

Exclusion criteria:

  1. Medication or supplements (i.e. amino acids, protein) known to affect protein metabolism
  2. Presence of acute illness
  3. History of liver disease
  4. Uncontrolled metabolic disease
  5. ECG documented abnormalities, atrial fibrillation, history of syncope, limiting or unstable angina, or congestive heart failure
  6. Chronically elevated blood pressure (systolic, >140 mmHg; diastolic, >100 mmHg)
  7. Cardiac pacemaker or other medical device implanted in the body
  8. Low hemoglobin or hematocrit
  9. Current participation in a weight-loss regimen, including extreme dietary practices
  10. Smoking
  11. Use of anabolic steroids or corticosteroids (within 3 months)

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

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Amino Acid Infusion in Lean
Other: Increase in the levels of plasma amino acids
Aminosyn 15%; 160 mg/kg FFM/h for 4 hours
Experimental: Amino acid Infusion in Obese
Other: Increase in the levels of plasma amino acids
Aminosyn 15%; 160 mg/kg FFM/h for 4 hours
Experimental: Exercise in lean
Other: Aerobic exercise
Moderate intensity for 45 minutes
Experimental: Exercise in Obese
Other: Aerobic exercise
Moderate intensity for 45 minutes

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Rate of synthesis of muscle proteins (mixed muscle proteins, mitochondrial proteins, β-F1-ATPase)
Time Frame: Measured during a 9-hour infusion study
Measured during a 9-hour infusion study

Secondary Outcome Measures

Outcome Measure
Time Frame
β-F1-ATPase mRNA expression; PGC-1 expression
Time Frame: Measured during a 9-hour infusion study
Measured during a 9-hour infusion study

Collaborators and Investigators

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

Sponsor

Mayo Clinic

Collaborators

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Investigators

  • Principal Investigator: Lori Roust, MD, Mayo Clinic
  • Principal Investigator: Christos S Katsanos, PhD, Arizona State University/Mayo Clinic Arizona

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.

General Publications

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 (Actual)

October 1, 2012

Primary Completion (Actual)

February 9, 2017

Study Completion (Actual)

February 7, 2020

Study Registration Dates

First Submitted

April 1, 2013

First Submitted That Met QC Criteria

April 1, 2013

First Posted (Estimate)

April 4, 2013

Study Record Updates

Last Update Posted (Actual)

April 3, 2020

Last Update Submitted That Met QC Criteria

April 1, 2020

Last Verified

April 1, 2020

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 12-004000

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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