Established and forthcoming drugs for the treatment of osteoporosis
1aVU University Medical Center, Department of Rheumatology, Amsterdam bDepartment of Internal Medicine/Rheumatology, Maastricht University Medical Center and CAPHRI, Maastricht, The Netherlands cBiomedical Research Institute, University Hasselt, Belgium.
Purpose Of Review:
The aim of treatment in patients at high risk for fractures is to reduce the risk of a first or a subsequent fracture. New data are available on the antifracture effects and side-effects of antiresorptive and osteoanabolic drugs, and new emerging therapies with new modes of action are on the horizon.
Recent Findings:
Calcium and vitamin D intake should be sufficient, but not too high. Vertebral, nonvertebral (including hip fracture) prevention with antiresorptive drugs such as bisphosphonates (alendronate, risedronate and zoledronic acid) and denosumab exceeds the risk of rare side-effects such as atypical femur fracture and osteonecrosis of the jaw. Teriparatide is an osteoanabolic drug that improves quality of life in severe osteoporosis. Strontium ranelate decreases dynamic parameters of bone formation during the first year of treatment, and could increase the risk of cardiovascular events in high-risk patients. Initiation of and adherence to fracture prevention drugs are still low. New potential developments in antiresorptive drugs include odanacatib, a selective inhibitor of cathepsin K, and, in osteoanabolic drugs, monoclonal antibodies against sclerostin.
Summary:
These recent data indicate that fracture prevention with antiresorptives and teriparatide is effective with a reasonable safety profile. Odanacatib and antisclerostin are promising new drugs with new mechanisms of action, as they are able to disconnect the normal coupling between bone resorption and bone formation.
Insights
Antiresorptive and osteoanabolic drugs effectively reduce fracture risk in high-risk patients. Emerging therapies like odanacatib and sclerostin inhibitors offer new mechanisms for bone health.
Area of Science:
- Bone biology and pharmacology
- Osteoporosis management
- Fracture prevention strategies
Background:
- High-risk patients require effective fracture prevention.
- Antiresorptive and osteoanabolic drugs are key treatments.
- New therapies are emerging with novel mechanisms.
Purpose of the Study:
- To review current data on antifracture drugs.
- To assess efficacy and side-effects of existing therapies.
- To highlight emerging treatments for osteoporosis.
Main Methods:
- Review of recent clinical data on osteoporosis medications.
- Analysis of antifracture efficacy and safety profiles.
- Identification of novel drug targets and mechanisms.
Main Results:
- Antiresorptive drugs (bisphosphonates, denosumab) and teriparatide show efficacy in fracture prevention.
- Rare side-effects exist but are generally outweighed by benefits.
- New agents like odanacatib and sclerostin inhibitors are promising.
Conclusions:
- Antiresorptives and teriparatide offer effective fracture prevention with acceptable safety.
- Odanacatib and sclerostin inhibitors represent promising advancements.
- Novel mechanisms may decouple bone resorption and formation.
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