Polyostotic Fibrous Dysplasia Clinical Trial
Official title:
A Randomized, Placebo-Controlled Trial of Alendronate in the Treatment of Polyostotic Fibrous Dysplasia and the McCune-Albright Syndrome
Verified date | May 2, 2011 |
Source | National Institutes of Health Clinical Center (CC) |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
This study will evaluate the effectiveness of alendronate in treating the bone abnormality in
polyostotic fibrous dysplasia and McCune-Albright syndrome. In these diseases, areas of
normal bone are replaced with a fibrous growth similar to a scar. The weakened bone causes
pain and increases patients' risk of bone fractures and bone deformities. Alendronate belongs
to a class of drugs called "bisphosphonates," which are approved by the Food and Drug
Administration to treat bone weakening, deformity and pain in other medical conditions. It is
thought that bisphosphonates might work by slowing the activity of osteoclasts-cells that
break down bone.
Patients 12 years of age and older with polyostotic fibrous dysplasia or McCune-Albright
syndrome may be eligible for this 3-year study. Candidates must also be enrolled in NIDCR's
protocol 98-D-0145 (Screening and Natural History of Patients with Polyostotic Fibrous
Dysplasia and McCune-Albright Syndrome).
Participants will be randomly assigned to one of two treatment groups: they will take one
capsule a day of either alendronate or placebo (a look-alike capsule that has no active
ingredient). They will take the capsules for 6 months, stop for 6 months, then take them for
another 6 months and then go off them for 6 months. They will then remain off the drug or
placebo for an additional 12 months and complete the study with a final follow-up visit at 36
months. While taking alendronate or placebo, patients will also take calcium and vitamin D to
prevent secondary hyperparathyroidism-a side effect of alendronate in which the bone does not
release enough calcium.
Patients will come to NIH for a physical examination and blood and urine tests every 6 months
and for monitoring of their bone disease, vision, hearing, pain levels, functional
evaluation, and photographs every 12 months. Many of the monitoring procedures, including
imaging studies and biopsies, are performed for the screening protocol (98-D-0145) and will
not be duplicated for this study. During the study periods when patients are taking
alendronate or placebo, they will have blood samples drawn by their local physician once
every 3 months and sent to NIH to check for secondary hyperparathyroidism.
If at the end of the study alendronate is found to be effective, patients who were in the
placebo treatment group will be offered alendronate for a 24-month period.
Status | Completed |
Enrollment | 40 |
Est. completion date | May 2, 2011 |
Est. primary completion date | August 19, 2007 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 6 Years and older |
Eligibility |
- INCLUSION CRITERIA: All patients must be concomitantly enrolled in the companion Screening and Natural History protocol. Any patient with at least 2 active fibrous dysplastic lesions of either the cranial, axial, or appendicular skeleton will be eligible for consideration for inclusion in the study. The diagnosis will be based on evidence typical findings on bone biopsy (performed during the "Screening" protocol). Final consideration for enrollment will depend on diagnosis at the NIH. Patients must be at least 6 years old. Patients may be of child-bearing age, but will be expected to be on a nonhormonal form of birth control that gives a 95% protection rate. If a patient becomes pregnant during the course of the study, they must withdraw but will be eligible for re-enrollment upon the completion of pregnancy and lactation. Patients on previous of concomitant therapy are eligible for enrollment. However, patients who have received previous treatment with a bisphosphonate must wait one year from the completion of the last course before they can be enrolled. EXCLUSION CRITERIA: Patient, child or parents unwilling to fully cooperate with the evaluation as outlined in the schedule and consent form and do not give informed consent. Any sexually active patient that is unwilling to use an appropriate contraceptive associated with a pregnancy-prevention rate of 95% or greater. Pregnancy is an absolute contraindication to be evaluated or admitted to the study and is grounds for removal from the study. However, patients may be re-enrolled once pregnancy and lactation are completed. Severe esophageal motility problems may put patients at increased risk for complications from alendronate and are not eligible for the study. Significant comorbidities such as decompensated heart failure or diabetes mellitus, renal or hepatic failure, or decompensated psychiatric conditions exclude patients from enrollment. Patients with either a history of sarcoma of the bone or who have a FD lesion that undergoes sarcomatous degeneration while enrolled in either this study or any of the companion protocols. |
Country | Name | City | State |
---|---|---|---|
United States | National Institutes of Health Clinical Center, 9000 Rockville Pike | Bethesda | Maryland |
Lead Sponsor | Collaborator |
---|---|
National Institute of Dental and Craniofacial Research (NIDCR) |
United States,
Czerwiec FS, Collins M, Feuillan P, Shenker A. Further study of the therapy for fibrous dysplasia is necessary. J Bone Miner Res. 1997 Dec;12(12):2128-30. — View Citation
Liens D, Delmas PD, Meunier PJ. Long-term effects of intravenous pamidronate in fibrous dysplasia of bone. Lancet. 1994 Apr 16;343(8903):953-4. — View Citation
Mastorakos G, Mitsiades NS, Doufas AG, Koutras DA. Hyperthyroidism in McCune-Albright syndrome with a review of thyroid abnormalities sixty years after the first report. Thyroid. 1997 Jun;7(3):433-9. — View Citation
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