Effect of Pharmacological Anti-lipolysis on FFA and VLDL-TG Metabolism Before and During Exercise

September 17, 2012 updated by: Birgitte Nellemann, University of Aarhus
This study will investigate free fatty acid and VLDL-TG metabolism before and during exercise with and without pharmacological antilipolysis by the niacin antagonist Acipimox. Main focuses will be VLDL-TG and free fatty acid metabolism as well as expression of membrane proteins in fat- and muscle biopsies.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Insulin resistance in liver and skeletal muscle is of central pathogenic significance in the development of type 2 diabetes. The molecular connections are unresolved but high levels of free fatty acids and triglyceride is probably involved. Diabetic subjects and to a lesser extent obese subjects have increased triglyceride levels, this could be due to an abnormal turnover of VLDL-TG. It is not yet investigated whether VLDL-TG kinetics changes during pharmacological antilipolysis. Using the aseptic ex-vivo labeling technique (developed in our laboratories) we will investigate this issue in sedentary healthy men. After a 3 hour basal period subjects will exercise on a bike for 60 minutes at 60% of VO2max. In both basal and exercise period one muscle and one fat biopsy will be obtained, further blood samples will be drawn to examine FFA and VLDL-TG metabolism etc..

This new knowledge will contribute to the understanding of metabolic disorders like type 2 diabetes and obesity.

Study Type

Interventional

Enrollment (Actual)

9

Phase

  • Not Applicable

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

  • Denmark
      • Aarhus, Denmark, 8000
        • University Hospital of Aarhus, Norrebrogade
      • Aarhus, Denmark, 8
        • University Hospital of Aarhus, Norrebrogade

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 55 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Male

Description

Inclusion Criteria:

- healthy, untrained males

Exclusion Criteria:

  • medication
  • history of malignancy, alcohol abuse or drug abuse
  • participation in isotope trials in the last 6 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: Crossover Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Acipimox
Tablet Acipimox 250 mg administered 4 times previous to and during the investigation day
Drug: Acipimox
Tablet Acipimox 250 mg administered 4 times previous to and during the investigation day
No Intervention: Placebo
Placebo tablets will be administered 4 times previous to and during the investigation day

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Effects of exercise and antilipolysis on FFA and VLDL-TG kinetics
Time Frame: 6 hour investigation day
Healthy untrained men, investigated with pharmacological antilipolysis by Acipimox (Olbetam) and placebo on 2 occasions. Each day consists of 3 hour basal period and 90 minutes exercise on a bicycle at 60% of VO2-maximum. During the day glucose and lipid metabolism is investigated by glucose and VLDL tracer, as well as indirect calorimetrics. Cellular signaling is investigated by 2 muscle- and 2 fat biopsies each day.
6 hour investigation day

Collaborators and Investigators

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

Sponsor

University of Aarhus

Investigators

  • Principal Investigator: Soren Nielsen, Dr. med., University Hospital of Aarhus

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

April 1, 2011

Primary Completion (Actual)

September 1, 2012

Study Completion (Actual)

September 1, 2012

Study Registration Dates

First Submitted

December 13, 2010

First Submitted That Met QC Criteria

December 13, 2010

First Posted (Estimate)

December 15, 2010

Study Record Updates

Last Update Posted (Estimate)

September 18, 2012

Last Update Submitted That Met QC Criteria

September 17, 2012

Last Verified

September 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • M-20100221

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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