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Published on: January 1, 2017
Denosumab in patients with cancer-a surgical strike against the osteoclast
Janet E Brown1, Robert E Coleman
1Cancer Research UK Center, St. James's Hospital, Leeds LS9 7TF, UK.
Abstract:
Elucidation of the molecular pathways underlying bone turnover has revealed potential therapeutic targets, including receptor activator of nuclear factor-κB ligand (RANKL), which is a mediator of osteoclast formation, function and survival. Denosumab is a fully human monoclonal antibody that binds to and inhibits RANKL. This agent has been developed for use in patients with early-stage and advanced-stage cancer, as well as for the treatment of osteoporosis, and can prevent bone loss and reduce fragility fractures in both types of disease. In the bone metastasis setting, several large phase III studies have shown that denosumab is more effective than bisphosphonates, namely zoledronic acid, in reducing skeletal morbidity arising from a wide range of tumors. In addition, a remarkable activity of denosumab has been demonstrated in giant-cell tumors of the bone. Subsequent studies of denosumab have demonstrated that it can delay bone metastasis in patients with castration-resistant prostate cancer; adjuvant studies in patients with breast cancer are in progress. This Review critically explores the emerging role of denosumab in maintaining bone health in the oncology setting, and discusses the factors that are likely to influence the choice between bisphosphonates and denosumab in clinical practice.
Insights
Denosumab, a RANKL inhibitor, effectively prevents bone loss and fractures in cancer patients and osteoporosis. It shows superior efficacy over bisphosphonates in reducing skeletal morbidity from bone metastases.
Area of Science:
- Oncology
- Bone Biology
- Pharmacology
Background:
- Bone turnover is regulated by molecular pathways, including receptor activator of nuclear factor-κB ligand (RANKL).
- RANKL is crucial for osteoclast formation, function, and survival.
- Dysregulation of bone turnover contributes to skeletal complications in cancer and osteoporosis.
Purpose of the Study:
- To review the role of denosumab in maintaining bone health in cancer patients.
- To compare the efficacy of denosumab with bisphosphonates in managing bone metastases.
- To discuss factors influencing treatment choices between denosumab and bisphosphonates.
Main Methods:
- Review of large phase III studies and clinical trials.
- Analysis of denosumab's efficacy in bone metastasis and giant-cell tumors of the bone.
- Exploration of denosumab's impact on bone metastasis delay and adjuvant settings.
Main Results:
- Denosumab inhibits RANKL, preventing bone loss and reducing fractures.
- Denosumab is more effective than zoledronic acid in reducing skeletal morbidity in bone metastases.
- Denosumab shows activity in giant-cell tumors and can delay bone metastasis in prostate cancer.
Conclusions:
- Denosumab is a valuable therapeutic agent for maintaining bone health in oncology.
- Denosumab offers advantages over bisphosphonates for managing skeletal-related events.
- Clinical decisions should consider patient-specific factors when choosing between denosumab and bisphosphonates.
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