- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00000427
Effects of Parathyroid Hormone in Men With Osteoporosis
Anabolic Actions of Parathyroid Hormone in Osteoporotic Men
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Osteoporosis causes bones to weaken and break more easily. Alendronate is used to treat or prevent osteoporosis. PTH is a protein hormone that increases the calcium and phosphorus release from bone, leading to formation of new bone. This study will examine the changes in bone density measured at multiple places in the skeleton and changes in chemicals in the body that indicate bone breakdown and bone formation. The study will indicate whether some breakdown of bone is required for PTH to have an overall bone-building effect in men.
Participants will be randomly assigned to receive PTH alone by daily injection under the skin, alendronate alone taken by mouth, or both PTH and alendronate. The study will last 2.5 years. All participants will receive some form of treatment for osteoporosis. Blood, urine, and bone density tests will be performed at 6-month intervals. During the first 6 months, participants will come in for additional study visits.
Participants who complete the initial 2.5 years of their assigned treatment will be eligible for a 12 month extension to monitor bone density and bone turnover after PTH is stopped. Participants who were receiving alendronate will continue taking alendronate. The goal of this extension is to determine what happens to bone density and turnover after PTH is stopped and whether alendronate is needed to prevent loss of PTH-induced bone gain.
Participants who complete the 12 month extension while on their assigned treatment will be eligible for a second 12 month extension in which all participants receive PTH therapy. Participants who have been receiving alendronate continue taking alendronate. The goal of the second extension is to determine if responsiveness to PTH is enhanced by a 12 month suspension of PTH treatment.
Study Type
Enrollment
Phase
- Phase 3
Contacts and Locations
Study Locations
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Massachusetts
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Boston, Massachusetts, United States, 02114
- Massachusetts General Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Bone density of the spine or femoral neck two standard deviations below the mean of young adult men
- Normal renal and liver function tests, normal serum testosterone level, normal vitamin D and PTH levels
Exclusion Criteria:
- Significant cardiac, renal, hepatic, or malignant disease.
- Disorders (e.g., Paget's disease, hyperthyroidism, hyperparathyroidism) or drugs (e.g., steroids, anticonvulsants, lithium, bisphosphonates, calcitonin, fluoride) known to affect bone metabolism
- Active peptic ulcer disease or severe reflux
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Joel S. Finkelstein, MD, Massachusetts General Hospital
Publications and helpful links
General Publications
- Finkelstein JS, Klibanski A, Schaefer EH, Hornstein MD, Schiff I, Neer RM. Parathyroid hormone for the prevention of bone loss induced by estrogen deficiency. N Engl J Med. 1994 Dec 15;331(24):1618-23. doi: 10.1056/NEJM199412153312404.
- Finkelstein JS, Hayes A, Hunzelman JL, Wyland JJ, Lee H, Neer RM. The effects of parathyroid hormone, alendronate, or both in men with osteoporosis. N Engl J Med. 2003 Sep 25;349(13):1216-26. doi: 10.1056/NEJMoa035725. Epub 2003 Sep 20.
- Finkelstein JS, Leder BZ, Burnett SM, Wyland JJ, Lee H, de la Paz AV, Gibson K, Neer RM. Effects of teriparatide, alendronate, or both on bone turnover in osteoporotic men. J Clin Endocrinol Metab. 2006 Aug;91(8):2882-7. doi: 10.1210/jc.2006-0190. Epub 2006 May 9.
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- P50AR044855 (NIH)
- NIAMS-015
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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