Bisphosphonates for Prevention of Post-Denosumab Bone Loss

Status Completed

Clinical Trial Summary

The primary goal of the study is to assess the extent to which bisphosphonate therapy will prevent decreases in bone mass that may occur after cessation of denosumab in premenopausal women with idiopathic osteoporosis (IOP) enrolled in AAAN0161 (FD05114) "Denosumab for the prevention of post-teriparatide bone loss in premenopausal women with idiopathic osteoporosis". In addition, the investigator will observe participants for a second year off bisphosphonate therapy to assess duration of response. The hypothesis is that bisphosphonate therapy with alendronate or zoledronic acid, initiated after recovery of bone remodeling activity, will prevent significant bone loss after discontinuing denosumab.

Clinical Trial Description

Osteoporosis in premenopausal women with normal menstrual function and no specific cause is termed idiopathic osteoporosis (IOP). IOP is a rare disease with an estimated prevalence of <200,000 affected premenopausal women in the United States. Women with IOP completing at least one year and up to three years of denosumab (Protocol AAAN0161) will be offered participation in this open-label study in which they would choose whether to take oral alendronate 70 mg weekly for 12 months or a single intravenous dose of zoledronic acid 5 mg. Subjects and study personnel will be blinded to BMD outcomes until 12 months. Discontinuation of denosumab is followed by substantial increases in bone turnover markers to well above baseline, bone resorption reaching twice baseline levels for about 6 months. Over the first 12 months off therapy, all the bone density gained on treatment is lost. Studies done at the institution has demonstrated the occurrence of multiple vertebral fractures in some patients who have stopped denosumab. Based upon these new fracture data, the Prolia label is currently recommending that consideration should be given to transition to another antiresorptive drug in patients stopping denosumab. The main goals of this extension study are to determine rates of bone loss and incidence of radiographic vertebral fractures during one year of bisphosphonate therapy (oral alendronate or intravenous zoledronic acid) initiated after completing denosumab. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT03396315
Study type	Interventional
Source	Columbia University
Contact
Status	Completed
Phase	Phase 2
Start date	January 29, 2018
Completion date	June 9, 2023

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.