3 Clinical Trials for Various Conditions
The overarching goal of the research program is to define optimal treatment for premenopausal women with clinically significant fracture syndromes that require medical therapy. The investigators hypothesize that romosozumab will be associated with improvements in bone mass and microarchitecture in premenopausal women, and also that the responses and response rates will exceed those observed in premenopausal women treated with teriparatide. The investigators will test this hypothesis in this phase 2 study of 30 premenopausal women with idiopathic osteoporosis (IOP) who will receive 12M of romosozumab 210 mg monthly followed by 12M of denosumab 60 mg SC q6M. Aim 1 will define the within-group effects of this regimen. Aim 2 will compare results from participants treated with romosozumab-denosumab to the investigator's well-characterized historical controls treated with teriparatide followed by denosumab.
Idiopathic osteoporosis (IOP) is defined as osteoporosis that affects young, otherwise completely healthy individuals with no secondary cause of bone loss. In the course of our prior research with premenopausal women with IOP, the investigators have shown that women with IOP have low areal bone mineral density (aBMD) at the spine, hip and forearm compared to normal women. Additionally, using noninvasive high resolution imaging of the central and peripheral skeleton and detailed analyses of transiliac crest bone biopsies, the investigators identified several features of bone quality in premenopausal women with IOP. There is currently no FDA-approved therapy for IOP in premenopausal women. However, teriparatide (Forteo) has been shown to improve bone mass and microarchitecture in postmenopausal women and is approved for men with primary or idiopathic osteoporosis, as well as men, premenopausal and postmenopausal women with glucocorticoid-induced osteoporosis. Because IOP in premenopausal women is an orphan disease, with an estimated prevalence of about 113,000 in the United States, pharmaceutical companies are unlikely to support development of therapies for this indication. Therefore, the major objective of this protocol is to establish the safety and efficacy of teriparatide in premenopausal women with IOP in a phase 2 clinical trial. All subjects will receive teriparatide as part of the study, but a randomly selected group of patients (10) will receive one year of placebo injections first before starting their two years of treatment. The remainder of subjects (30) will receive active drug only for two years. Funding Source - FDA OOPD
The purpose of this research study is to evaluate antiresorptive therapy with denosumab (Prolia) for prevention of bone loss after stopping teriparatide (TPTD) in premenopausal women with idiopathic osteoporosis. Premenopausal women who have received TPTD in the FDA Orphan Diseases Program-funded trial, "A Phase 2 Study of Teriparatide for the Treatment of Idiopathic Osteoporosis in Premenopausal Women" (NCT01440803) may be eligible to participate in the current study, a 36-month open-label pilot study of denosumab (Prolia®, 60mg subcutaneous (SC) every 6 months). The goals of the study are to estimate the effects of denosumab on central and peripheral, as well as trabecular and cortical, bone mass and microstructure and to obtain preliminary data to inform the design of a future randomized study. This study presents the first opportunity to study the effects of denosumab after TPTD in this unique and severely affected group of young women. Funding Source: FDA Office of Orphan Products Development (OOPD).