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Sponsored by: |
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) |
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Information provided by: | National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) |
ClinicalTrials.gov Identifier: | NCT00000427 |
Alendronate is a drug that blocks or reduces bone loss, while parathyroid hormone (PTH) stimulates the formation of new bone. The purpose of this study is to compare the bone-building effects of PTH alone, alendronate alone, and both PTH and alendronate in men with osteoporosis over a two-and-a-half year period.
Condition | Intervention | Phase |
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Osteoporosis |
Drug: Parathyroid hormone Drug: Alendronate |
Phase III |
Study Type: | Interventional |
Study Design: | Treatment, Randomized, Open Label, Active Control, Parallel Assignment, Safety/Efficacy Study |
Official Title: | Anabolic Actions of Parathyroid Hormone in Osteoporotic Men |
Estimated Enrollment: | 81 |
Study Start Date: | September 1999 |
Study Completion Date: | October 2005 |
Primary Completion Date: | October 2005 (Final data collection date for primary outcome measure) |
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.
Ages Eligible for Study: | 46 Years to 85 Years |
Genders Eligible for Study: | Male |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
Exclusion Criteria:
United States, Massachusetts | |
Massachusetts General Hospital | |
Boston, Massachusetts, United States, 02114 |
Principal Investigator: | Joel S. Finkelstein, MD | Massachusetts General Hospital |
Responsible Party: | Massachusetts General Hospital ( Joel S. Finkelstein, M.D. Principal Investigator ) |
Study ID Numbers: | P50 AR44855, NIAMS-015 |
Study First Received: | January 18, 2000 |
Last Updated: | February 29, 2008 |
ClinicalTrials.gov Identifier: | NCT00000427 |
Health Authority: | United States: Food and Drug Administration |
Parathyroid Hormone (PTH) Alendronate Bone metabolism Bone mineral density (BMD) |
Bone loss Postmenopausal osteoporosis Osteoporosis in men |
Musculoskeletal Diseases Alendronate Osteoporosis, Postmenopausal |
Osteoporosis Bone Diseases, Metabolic Bone Diseases |
Physiological Effects of Drugs Bone Density Conservation Agents Pharmacologic Actions |