- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01713231
Effect of High-Dose Vitamin D on Bone Density in Osteogenesis Imperfecta
September 8, 2014 updated by: Louis-Nicolas Veilleux Ph.D.
- Overall Objective: To test the hypothesis that oral vitamin D supplementation at higher than currently prescribed doses has a beneficial effect on the skeleton of young patients with osteogenesis imperfecta (OI).
- Specific Aims: 1. To determine whether 12 months of high-dose vitamin D supplementation, compared to standard-dose vitamin D supplementation, increases areal bone mineral density z-scores at the lumbar spine. 2. To examine the effectiveness of high-dose vitamin D supplementation to increase trabecular and cortical bone mineral density at the radius. 3. To examine whether high-dose vitamin D supplementation has an effect on physiological determinants of bone mass (parathyroid hormone, activity of bone metabolism, muscle function).
- Background: In a preliminary cross-sectional study of 282 OI patients we observed an inverse relationship between serum 25-hydroxyvitamin D and parathyroid hormone levels and a positive relationship between circulating levels of 25-hydroxyvitamin D and lumbar spine areal bone mineral density z-scores. This suggested that high-dose vitamin D supplementation would have a beneficial effect on bone density. Most OI patients currently receive oral vitamin D supplementation of 400 International Units per day, but doses of 2000 International Units per day are safe and have been shown to be beneficial in studies on healthy adolescents.
- Study Design: This is a parallel-group double-blind randomized controlled trial of 12 months duration on 60 children and adolescents aged 6 to 19 years with a clinical diagnosis of OI. One group of 30 participants will be randomized to receive vitamin D3 at a dose of 2000 international units per day ('high-dose group'). The other group of 30 participants will be randomized to receive vitamin D3 at a dose of 400 international units per day ('standard-dose group'). Randomization will be stratified according to pubertal status and bisphosphonate treatment status.
- Clinical Relevance: The proposed study aims at direct improvements in the care of OI patients. If a simple and low-cost 'intervention' such as high-dose vitamin D supplementation can be shown to be effective in relieving some of the disease burden associated with OI, the benefit to OI patients worldwide would be substantial.
Study Overview
Status
Completed
Conditions
Study Type
Interventional
Enrollment (Actual)
60
Phase
- Phase 4
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
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Quebec
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Montréal, Quebec, Canada, H3G1A6
- Shriners Hospitals for Children-Canada
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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
6 years to 19 years (Child, Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Clinical diagnosis of OI of any type.
Exclusion Criteria:
- Any condition that renders bone density measurements at the lumbar spine impossible. An example for this is prior spinal fusion surgery.
- Bisphosphonate therapy for less than two years duration.
- Use of medication, other than bisphosphonates, known to affect bone metabolism or 25OHD serum concentrations. Examples are anti-epileptics, active vitamin D metabolites, corticosteroids and thyroid hormones.
- Liver and renal disease known to interfere with vitamin D metabolism.
- Any other disorder of calcium and phosphate metabolism (apart from vitamin D deficiency) that might interfere with PTH.
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: Supportive Care
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: standard-dose vitamin D
one group of 30 participants will be randomized to receive vitamin D3 at a dose of 400 international units per day ('standard-dose group').
|
|
Experimental: high-dose vitamin D
One group of 30 participants will be randomized to receive vitamin D3 at a dose of 2000 international units per day ('high-dose group').
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in areal bone mineral density z-score of the lumbar spine
Time Frame: at baseline and 12 months
|
LS-aBMD z-score will be used as the primary outcome.The lumbar spine is the standard site of measurement both in the clinical follow up of OI patients .
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at baseline and 12 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in trabecular and cortical volumetric bone mineral density z-scores at the radius, as measured by pQCT, relative to baseline.
Time Frame: at baseline and at 12 months
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Trabecular bone is analyzed at the distal radial metaphysis ('4% site').
Cortical bone is analyzed at the radial diaphysis ('65% site').
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at baseline and at 12 months
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Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Percentage change in lower extremity muscle power per body weight, as measured by jumping mechanography, relative to baseline.
Time Frame: baseline and 12 months
|
A countermovement jump to maximal height ('single two-legged jump') will be evaluated.
In patients who are unable to jump, the heel-rise test will be used to determine muscle power.
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baseline and 12 months
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
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
September 1, 2012
Primary Completion (Actual)
March 1, 2013
Study Completion (Actual)
July 1, 2014
Study Registration Dates
First Submitted
October 21, 2012
First Submitted That Met QC Criteria
October 21, 2012
First Posted (Estimate)
October 24, 2012
Study Record Updates
Last Update Posted (Estimate)
September 9, 2014
Last Update Submitted That Met QC Criteria
September 8, 2014
Last Verified
September 1, 2014
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Genetic Diseases, Inborn
- Musculoskeletal Diseases
- Connective Tissue Diseases
- Bone Diseases
- Bone Diseases, Developmental
- Osteochondrodysplasias
- Collagen Diseases
- Osteogenesis Imperfecta
- Physiological Effects of Drugs
- Micronutrients
- Bone Density Conservation Agents
- Calcium-Regulating Hormones and Agents
- Vitamin D
- Cholecalciferol
- Vitamins
- Ergocalciferols
Other Study ID Numbers
- A02-M14-12A
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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