ElderlyNCT02124590
The Effect of Oral Carnitine Supplementation on MRS-derived Mitochondrial Function
A study testing Acute Exercise in people with Elderly and Pre-diabetic, run by Duke University at 1 site in United States.
Trial summary
This is a longitudinal study supported by Pfizer and is a collaboration between DMPI (Duke Molecular Physiology Institute) and DIAL (Duke Image Acquisition Laboratory) to measure the effects of acute exercise on carnitine and acylcarnitine levels in the muscle and on insulin sensitivity in the plasma. Read more about this study
- Who is it for?
- Ages 60 to 80 years
- Conditions the study is for
- Elderly, Pre-diabetic
- What is being tested?
- Acute Exercise
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 14 participants
- Where
- 1 siteUnited States
- Study dates
- Jun 2014to Dec 2014
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 60 to 80 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Age: 60-80 years
- Moderately Overweight: BMI - 25.0 - 35.4
- Sedentary - exercise ≤ 1 day/week
- Fasting plasma glucose: > 100 - < 126 mg/dL
- Readings from two separate days
Who cannot join
- Orthopedic limitations, musculoskeletal disease and/or injury
- Allergic to xylocaine
- Inability to give blood continuously through an intravenous catheter
- Have a confounding medical condition that is progressive and unstable such as HIV, Hepatitis C, active cancer, and/or taking medications for those conditions that are likely to confound the assessment of pre-diabetes
- Prior surgical operation within the past 6 months
- Prior injury to the eye involving metallic objects or fragments
Show all 28Show fewer
- Prior injury involving a metallic object or foreign body (eg. BB, bullet, shrapnel, etc.)
- Tattoos from the waist down to the feet
- Any of the following implants or devices
- Aneurysm clip
- Cardiac pacemaker
- Implanted cardioverter defibrillator (ICD)
- Electronic implant or device
- Magnetically activated implant or device
- Neurostimulation system
- Spinal cord stimulator
- Internal electrodes or wires
- Bone growth/bone fusion stimulator
- Cochlear, otologic or other ear implant
- Insulin or other infusion pump
- Implanted drug infusion device
- Eye implants
- Vascular access port and/or catheter
- Wire mesh implant or stent
- Other implant
- Claustrophobia
- Prior knee replacement surgery
- Pregnant or intending to become pregnant during the study
Trial locations and contacts
1 site in 1 country.
United States1 site
Duke Center for Living
Durham, North Carolina, 27710
About this study
This is a longitudinal study supported by Pfizer and is a collaboration between DMPI (Duke Molecular Physiology Institute) and DIAL (Duke Image Acquisition Laboratory) to measure the effects of acute exercise on carnitine and acylcarnitine levels in the muscle and on insulin sensitivity in the plasma. This pilot study seeks to explain why moderate intensity exercise provides more improvements in glucose control for pre-diabetic patients than vigorous intensity. The investigators hypothesize that moderate intensity exercise might be beneficial for elderly individuals who are overweight or obese, specifically by: 1. Reducing damaging excess protein acetylation (measured in muscle biopsy), 2. Improving the acylcarnitine/carnitine ratio (measured by MRS), 3. Improving overall mitochondrial function as reflected in reduced phosphocreatine recovery time (measured by MRS) and 4. Increasing insulin sensitivity as measured by a 4-hour oral glucose tolerance test. Investigators intend to use the results of this study to show feasibility in measuring mitochondrial function at Duke for a larger federal grant submission. Investigators hypothesize that carnitine insufficiency might contribute to mitochondrial dysfunction and obesity-related impairments in glucose tolerance and insulin action.
- Conditions
- Elderly, Pre-diabetic
- Being tested
- Acute Exercise
- Keywords
- Carnitine, Acylcarnitine, Exercise, Exercise Intensity, Insulin Sensitivity
- Medical subject headings
- Glucose Intolerance, Motor Activity, Insulin Resistance
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Acute ExerciseOther
Repeated isometric leg exercises at varying intensities for up to twelve minutes per bout. Leg exercises will target the quadriceps muscles.
Acute ExerciseOther
Aerobic exercise session on a bike at 50% of peak VO2 for 30 minutes.
| Study group | Role | What they receive |
|---|---|---|
| Acute Exercise | Experimental | Repeated isometric leg exercises at varying intensities and a second visit with aerobic bike exercise for 30 minutes at 50% peak VO2. Receives: Other: Acute Exercise |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Acylcarnitine/Carnitine ratio
Measured: Baseline, One Month
Secondary outcomes (3)
Change in Protein acetylation
Measured: Baseline, One Month
Change in Insulin Sensitivity
Measured: Baseline, One Month
Change in Mitochondrial Function
Measured: Baseline, One Month
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Apr 2014 (estimated)
- Study startJun 2014
- Primary completionDec 2014
- Study completionDec 2014
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for ElderlyStudies of the same condition, open and under way.
- More trials run by Duke UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 14 participants (actual)
Sponsor and investigators
- Lead sponsor
- Duke University
- Sponsor type
- University, hospital or other
- Collaborators
- Pfizer
- Responsible party
- Sponsor
- Investigators
- William E Kraus, MD, Principal investigator, Duke University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02124590
- Sponsor's protocol ID
- Pro00053117
- Status last verified
- Jun 2015
- First submitted
- 24 Apr 2014
- Last updated
- 17 Jun 2015
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 17 Jun 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of Oral Carnitine Supplementation on MRS-derived Mitochondrial Function
- ClinicalTrials.gov ID
- NCT02124590
- Acronym / sponsor ID
- Pro00053117
- Conditions
- Elderly, Pre-diabetic
- Keywords
- Carnitine, Acylcarnitine, Exercise, Exercise Intensity, Insulin Sensitivity
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 14 participants (actual)
- Lead sponsor
- Duke UniversityUniversity, hospital or other
- Collaborators
- Pfizer
- Study start
- Jun 2014
- Primary completion
- Dec 2014 (actual)
- Study completion
- Dec 2014 (actual)
- First posted
- 28 Apr 2014 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a longitudinal study supported by Pfizer and is a collaboration between DMPI (Duke Molecular Physiology Institute) and DIAL (Duke Image Acquisition Laboratory) to measure the effects of acute exercise on carnitine and acylcarnitine levels in the muscle and on insulin sensitivity in the plasma. This pilot study seeks to explain why moderate intensity exercise provides more improvements in glucose control for pre-diabetic patients than vigorous intensity. The investigators hypothesize that moderate intensity exercise might be beneficial for elderly individuals who are overweight or obese, specifically by: 1. Reducing damaging excess protein acetylation (measured in muscle biopsy), 2. Improving the acylcarnitine/carnitine ratio (measured by MRS), 3. Improving overall mitochondrial function as reflected in reduced phosphocreatine recovery time (measured by MRS) and 4. Increasing insulin sensitivity as measured by a 4-hour oral glucose tolerance test. Investigators intend to use the results of this study to show feasibility in measuring mitochondrial function at Duke for a larger federal grant submission. Investigators hypothesize that carnitine insufficiency might contribute to mitochondrial dysfunction and obesity-related impairments in glucose tolerance and insulin action.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Acute Exercise | Experimental | Other: Acute ExerciseRepeated isometric leg exercises at varying intensities and a second visit with aerobic bike exercise for 30 minutes at 50% peak VO2. |
Who may qualify
- Ages
- 60 to 80 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Age: 60-80 years
- Moderately Overweight: BMI - 25.0 - 35.4
- Sedentary - exercise ≤ 1 day/week
- Fasting plasma glucose: > 100 - < 126 mg/dL
- Readings from two separate days
Key exclusion criteria (28 listed)
- Orthopedic limitations, musculoskeletal disease and/or injury
- Allergic to xylocaine
- Inability to give blood continuously through an intravenous catheter
- Have a confounding medical condition that is progressive and unstable such as HIV, Hepatitis C, active cancer, and/or taking medications for those conditions that are likely to confound the assessment of pre-diabetes
- Prior surgical operation within the past 6 months
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Acute ExerciseRepeated isometric leg exercises at varying intensities for up to twelve minutes per bout. Leg exercises will target the quadriceps muscles. | Other | Acute Exercise |
| Acute ExerciseAerobic exercise session on a bike at 50% of peak VO2 for 30 minutes. | Other | Acute Exercise |
Primary outcome
Change in Acylcarnitine/Carnitine ratio
Time frame: Baseline, One Month
3 secondary outcomes
Change in Protein acetylation
Time frame: Baseline, One Month
Change in Insulin Sensitivity
Time frame: Baseline, One Month
Change in Mitochondrial Function
Time frame: Baseline, One Month
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 17 Jun 2015.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
William E Kraus, MD principal investigator
Duke University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Acute Exercise in people with Elderly and Pre-diabetic, run by Duke University at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 28 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 17 Jun 2015. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Acylcarnitine/Carnitine ratio (time frame: Baseline, One Month). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Jun 2015.