- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01177189
Oxidative Stress Links Aging, Activity, and Mobility Limitation
October 9, 2018 updated by: VA Office of Research and Development
Oxidative Stress Links Aging, Activity and Mobility Limitation
The purpose of this study is to understand why and how oxidative stress negatively impacts mobility in the elderly, and to determine whether antioxidant supplements can increase vascular health and mobility.
Study Overview
Status
Terminated
Conditions
Intervention / Treatment
Detailed Description
With the premise that U.S. Veteran demographics reveal an aging population with significant mobility limitation and oxidative stress is tightly linked to both of these characteristics, a series of skeletal muscle/vascular studies are proposed.
Specifically, in a series of recent studies the investigators' group has documented positive vascular consequences of antioxidant supplementation during exercise in older subjects that negatively impacted young people.
Further provocative findings revealed that following exercise training the older subjects were now also negatively impacted by the antioxidant supplementation.
These findings have implications for the understanding of the complex balance between the positive effects of exercise-based rehabilitation, exercise induced oxidative stress, aging, frailty, and subsequent mobility limitation.
Therefore four specific aims are proposed that will answer the questions of where (I) oxidative stress is most prevalent in the elderly, why (II) oxidative stress occurs in the elderly, what (III) are the acute consequences of oxidative stress in the elderly, and finally how (IV) can exercise-induced oxidative stress as the result of exercise training in elderly be appropriately managed with exogenous antioxidant therapy to promote compliance and the positive outcome of increased mobility.
Study Type
Interventional
Enrollment (Actual)
87
Phase
- Not Applicable
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
Yes
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Healthy men and women aged either between 18 - 30 years (young group) and >70 years (old group)
- Free of overt disease. Subjects will be non-obese (BMI < 30) and have plasma glucose concentrations < 7.0 mmol/L under fasting conditions and < 11.1 mmol/L at 120 minutes of an oral glucose tolerance test (OGTT)
- Subjects will be sedentary, defined here as no regular physical activity for at least the prior 2 years
- Candidates must have no orthopedic limitations that would prohibit them from performing cycle or knee-extensor exercise
- All women will be postmenopausal (either natural or surgical) defined as a cessation of menses for at least 2 years, and in women without a uterus, follicle stimulating hormone (FSH) > 40 IU/L
Exclusion Criteria:
- Candidates demonstrating dyslipidemia based on the National Cholesterol Education Program Guidelines of plasma total cholesterol > 240 mg/dl with LDL-cholesterol > 160 mg/dl will be excluded from participation
- Candidates who smoke or are taking medications (blood pressure medications, statins, antioxidants etc.) that could influence the results of the study will not be eligible
- In terms of diet, subjects will be asked to maintain a dietary record for one week prior to the pre-screening and if this reveals a diet that differs substantially from the "typical" average diet in both the young and old, the subject will not be eligible
- Women currently taking hormone replacement therapy (HRT) in the preceding year will be excluded from the proposed studies
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: Treatment
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Other: Arm 1
Young healthy men and women aged 18-30
|
Oral antioxidant cocktail or placebo to be consumed daily
|
Other: Arm 2
Older healthy men and women aged >70.
|
Oral antioxidant cocktail or placebo to be consumed daily
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Vascular Function (i.e. % Flow Mediated Vasodilation)
Time Frame: 8 weeks
|
The effect on flow mediated vasodilation is measured using Doppler ultrasound.
|
8 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Exercise-induced Oxidative Stress (i.e. Free Radical Concentrations and Levels of Lipid Peroxidation)
Time Frame: 8 weeks
|
Free radicals and levels of lipid peroxidation were measured using electron paramagnetic spectroscopy and ELISA assays. A minimum value is 0 and a maximum value is 10. A higher value is a worse outcome. |
8 weeks
|
Vascular Function Following the Antioxidant Intervention
Time Frame: 8 weeks
|
The degree of vasodilation following the antioxidant intervention measured by Doppler ultrasound.
|
8 weeks
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Collaborators
Investigators
- Principal Investigator: Russell S Richardson, PhD, VA Salt Lake City Health Care System, Salt Lake City, UT
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)
July 1, 2011
Primary Completion (Actual)
July 3, 2017
Study Completion (Actual)
July 3, 2017
Study Registration Dates
First Submitted
July 30, 2010
First Submitted That Met QC Criteria
August 5, 2010
First Posted (Estimate)
August 6, 2010
Study Record Updates
Last Update Posted (Actual)
February 21, 2019
Last Update Submitted That Met QC Criteria
October 9, 2018
Last Verified
September 1, 2017
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- E6910-R
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
product manufactured in and exported from the U.S.
No
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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