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Changes of Biomarkers in Response to Training and Antioxidant Treatment

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: March 19, 2008
Last Update Posted: January 20, 2010
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
University of Jena
Information provided by:
University of Leipzig
The aim of the study is to compare the effects of an intensive 4 weeks exercise training program with or without additional treatment with antioxidants. 16 volunteers are included into the study and randomized into a treatment (n=8,Vitamine E 400 IU od + vitamine C 1g twice daily) and a non-treatment (n=8, training only) group. Before and after the training program, skeletal muscle biopsies will be taken to measure PGC-1alpha and PPARgamma mRNA expression. In addition before and after the training program individuals will have the following measurements: body weight, waist circumference, body fat content (DEXA scan), euglycemic-hyperinsulinemic clamps, ergospirometer (VO2 max), routine laboratory measurements, serum malondialdehyde concentrations.

Condition Intervention Phase
Obesity Type 2 Diabetes Dietary Supplement: Vitamin C, Vitamin E Dietary Supplement: Antioxidant treatment Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Basic Science
Official Title: Effects of Training and Antioxidant Treatment on Circulating Markers of Oxidative Stress and Skeletal Muscle mRNA Expression

Resource links provided by NLM:

Further study details as provided by University of Leipzig:

Primary Outcome Measures:
  • PGC-1alpha mRNA expression in skeletal muscle PPARgamma mRNA expression in skeletal muscle Serum malondialdehyde concentration [ Time Frame: after 4 weeks ]

Secondary Outcome Measures:
  • body weight glucose infusion rate during the steady state of an euglycemic-hyperinsulinemic clamp VO2max [ Time Frame: 4 weeks ]

Enrollment: 40
Study Start Date: March 2008
Study Completion Date: December 2008
Primary Completion Date: October 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1

Antioxidant treatment arm:

Vitamin E, 400 IU po, once daily Vitamin C, 1g po, twice daily

Dietary Supplement: Vitamin C, Vitamin E
Vitamin C, 1g po, twice daily Vitamin E, 400 IU po, once daily
Placebo Comparator: 2
Dietary Supplement: Antioxidant treatment
no treatment


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Ages Eligible for Study:   25 Years to 35 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Must be able to swallow tablets
  • signed informed consent
  • no concommitant medication
  • male
  • age between 25 - 35 years

Exclusion Criteria:

  • drug, tobacco or alcohol abuse
  • any chronic disease
  • any acute or chronic inflammatory disease as determined by a leucocyte count > 7000 Gpt/l, C-reactive protein (CrP) > 5.0 mg/dl or clinical signs of infection
  • systolic blood pressure (SBP) > 140mmHg and diastolic blood pressure (DBP) was > 85mmHg
  • cardiovascular or peripheral artery disease
  • thyroid dysfunction
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00638560

University of Leipzig
Leipzig, Germany, 04103
Sponsors and Collaborators
University of Leipzig
University of Jena
Principal Investigator: Matthias Blüher, MD University of Leipzig
  More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Prof. Dr. med. Matthias Blüher, Medical Department, University of Leipzig
ClinicalTrials.gov Identifier: NCT00638560     History of Changes
Other Study ID Numbers: MB-MR-2008-290208
First Submitted: March 12, 2008
First Posted: March 19, 2008
Last Update Posted: January 20, 2010
Last Verified: February 2009

Keywords provided by University of Leipzig:
oxidative stress
training intervention

Additional relevant MeSH terms:
Ascorbic Acid
Vitamin E
Growth Substances
Physiological Effects of Drugs
Molecular Mechanisms of Pharmacological Action
Protective Agents