Randomized Active-Controlled Phase II Study of Denosumab Efficacy and Safety in Patients With Breast Cancer-Related Bone Metastases
2007
Purpose Denosumab, a fully human monoclonal antibody to receptor activator of nuclear factor-κB ligand, suppresses bone resorption. In this study, we evaluated the efficacy and safety of five dosing regimens of denosumab in patients with breast cancer-related bone metastases not previously treated with intravenous bisphosphonates (IV BPs). Patients and Methods Eligible women (n = 255) with breast cancer-related bone metastases were stratified by type of antineoplastic therapy received and randomly assigned to one of six cohorts (five denosumab cohorts [blinded to dose and frequency]; one open-label IV BP cohort). Denosumab was administered subcutaneously every 4 weeks (30, 120, or 180 mg) or every 12 weeks (60 or 180 mg). The primary end point was percentage of change in the bone turnover marker urine N-telopeptide corrected for urine creatinine (uNTx/Cr) from baseline to study week 13. The percentage of patients achieving more than 65% uNTx/Cr reduction, time to more than 65% uNTx/Cr reduction, patients ...
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