- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01179503
Vitamin D Supplementation and Physical Function in Older Adults
August 15, 2018 updated by: Wake Forest University Health Sciences
Vitamin D Supplementation, Skeletal Muscle Gene Expression, and Physical Performance in Older Adults
A growing body of evidence suggests that vitamin D status is important in biologic processes involved in the maintenance of physical function.
To advance the investigators understanding of the role of vitamin D in physical function, the investigators will conduct a feasibility pilot study to collect key information to help design a full-scale randomized trial to determine whether vitamin D supplementation will delay declines in physical function.
The primary goals of the pilot study are to determine cost-effective strategies for identifying persons at high risk for functional decline with insufficient vitamin D levels, determine the serum vitamin D response to a vitamin D supplementation regimen designed to attain sufficient vitamin D levels, and provide preliminary data of key functional measures (balance, physical performance and muscle power) for the future larger study design.
A secondary goal is to begin to examine potential mechanisms by which vitamin D supplementation may enhance physical performance by exploring the effects of vitamin D supplementation on changes in skeletal muscle gene expression.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
A growing body of evidence suggests that vitamin D status is important in biologic processes involved in the maintenance of physical function.
However, whether remediation of vitamin D insufficiency will improve physical function and the potential mechanisms involved are unclear.
Previous vitamin D supplementation trials have produced mixed results with respect to physical function; however, most trials did not specifically recruit individuals who were vitamin D insufficient nor is the potential mechanism of action understood well enough to appropriately select those individuals most likely to benefit.
To advance our understanding of the role of vitamin D in physical function, the investigators will conduct a feasibility pilot study to collect key information to help design a full-scale randomized trial to determine whether vitamin D supplementation will delay declines in physical function.
The primary goals of the pilot study are to determine cost-effective strategies for identifying persons at high risk for functional decline with insufficient vitamin D levels, determine the serum vitamin D response to a vitamin D supplementation regimen designed to attain sufficient vitamin D levels, and provide preliminary data of key functional measures (balance, short physical performance battery (SBBP) and muscle power) for the future larger study design.
A secondary goal is to begin to examine potential mechanisms by which vitamin D supplementation may enhance physical performance and muscle contractility by exploring the effects of vitamin D supplementation on changes in skeletal muscle gene expression using microarrays.
Study Type
Interventional
Enrollment (Actual)
16
Phase
- Early 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
-
-
North Carolina
-
Winston-Salem, North Carolina, United States, 27157
- Wake Forest University
-
-
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
70 years to 89 years (Older Adult)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Short Physical Performance Battery (SPPB) score of ≥ 4 to < 10
- Vitamin D insufficient (serum 25(OH)D ≥ 10 to < 25 ng/mL)
Exclusion Criteria:
- Serious or uncontrolled chronic disease including: insulin-dependent or uncontrolled diabetes; cancer requiring treatment in past year, except non-melanoma skin cancers; past or current ischemic heart disease, uncontrolled angina, heart failure, peripheral artery disease (PAD), or stroke; chronic respiratory disease; uncontrolled endocrine/metabolic disease; neurological or hematological disease; liver or renal dysfunction; and severe musculoskeletal impairment
- Impaired cognitive function (MMSE ≤ 24)
- Dependent on a cane or walker
- Use of anti-coagulants
- Unwillingness to undergo a muscle biopsy
- Taking prescription vitamin D2 or OCT vitamin D3 supplements of > 1000 IU/d
- Inability or contraindications to consume daily vitamin D and calcium supplements
- Weight loss of ≥ 5% or more in the past 6 months
- Involved in any other intervention
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: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Calcium only
1200 mg Calcium per day
|
600 mg calcium carbonate twice daily (total of 1200 mg/day) for 4 months
|
Experimental: Vitamin D plus calcium
2000 IU vitamin D plus 1200 mg calcium per day
|
1000 IU of vitamin D3 twice daily (for a total of 2000 IU/day) plus 600 mg calcium carbonate twice daily (for a total of 1200 mg/day)
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Physical performance
Time Frame: 4 months
|
Change in the expanded Short Physical Performance Battery (SPPB) score (composite score including the following: timed 4m walk; time to stand from a chair 5 times without the use of arms; and time to hold side-by-side, semi-tandem, tandem, and one legged stands for the testing of balance)
|
4 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Skeletal muscle gene expression
Time Frame: 4 months
|
Muscle will be obtained from the vastus lateralis using the percutaneous needle biopsy technique.
Five µg of RNA will be supplied for each experimental condition to be analyzed.
The WFUHS MicroArray Core Facility further purifies the provided RNA over an RNAeasy column and performs all subsequent steps of the GeneChip protocol (cDNA generation, generation of biotinylated cRNA, chip hybridization, and generation of .CEL files).
|
4 months
|
Change in expanded SPPB balance task time
Time Frame: 4 months
|
Change in expanded SPPB balance task time (time to hold side-by-side, semi-tandem, tandem, and one legged stands; max of 30 sec)
|
4 months
|
Change in narrow 4m walk test of balance time
Time Frame: 4 months
|
Change in time to complete narrow 4m walk test of balance (usual pace over 4m while staying between lines of colored tape placed 20cm apart)
|
4 months
|
Change in 400m walk test time
Time Frame: 4 months
|
Change in 400m walk test time (usual pace)
|
4 months
|
Change in knee extensor power
Time Frame: 4 months
|
Change in knee extensor power measured by the Nottingham Power Rig
|
4 months
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Collaborators
Investigators
- Study Director: Denise K Houston, PhD, Wake Forest University
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
January 1, 2010
Primary Completion (Actual)
May 1, 2011
Study Completion (Actual)
May 1, 2011
Study Registration Dates
First Submitted
August 10, 2010
First Submitted That Met QC Criteria
August 10, 2010
First Posted (Estimate)
August 11, 2010
Study Record Updates
Last Update Posted (Actual)
August 17, 2018
Last Update Submitted That Met QC Criteria
August 15, 2018
Last Verified
August 1, 2018
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- IRB00011371
- R01AG029364-03S1 (U.S. NIH Grant/Contract)
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Yes
Studies a U.S. FDA-regulated device product
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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