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Published on: June 8, 2014
The molecular basis of bisphosphonate activity: a preclinical perspective
Jonathan Green1, Philippe Clézardin
1Novartis Pharma AG, Basel, Switzerland.
Abstract:
Bisphosphonates are widely used to preserve and improve bone health in patients with cancer. Emerging evidence suggests that in addition to their effects on bone health, bisphosphonates may have anticancer activity. Some of the activity associated with bisphosphonates is observed in non-osteoclast cells; therefore, the bioavailability of bisphosphonates is briefly discussed. Structure-function correlations and the molecular and cellular mechanisms that underlie bisphosphonate activity are also examined. In addition to a detailed discussion of the molecular interaction between nitrogen-containing bisphosphonates and farnesyl pyrophosphate synthase and the formation of cytotoxic triphosphoric acid 1-adenosin-5'-yl ester 3-(3-methylbut-3-enyl) ester (ApppI), the effects of bisphosphonates on the transforming growth factor-beta (TGF)-beta pathway, the receptor activator of nuclear factor-kappaB (NFkappaB) ligand (RANKL)/osteoprotegerin (OPG) axis, and novel molecular targets are reviewed. Finally, a basis for the observed preclinical and clinical activity of bisphosphonates, including effects on apoptosis, cell proliferation, cell invasion, modulation of immune function, and suppression of tumor-mediated angiogenesis, is provided.
Insights
Bisphosphonates, used for bone health in cancer patients, show emerging anticancer activity. Their molecular mechanisms involve targeting key cellular pathways and enzymes, impacting tumor growth and immune function.
Area of Science:
- Oncology
- Pharmacology
- Molecular Biology
Background:
- Bisphosphonates are standard treatments for bone health in cancer patients.
- Emerging research indicates potential anticancer properties beyond bone preservation.
- Understanding bisphosphonate bioavailability and cellular mechanisms is crucial.
Purpose of the Study:
- To explore the anticancer activity of bisphosphonates.
- To examine the molecular and cellular mechanisms underlying bisphosphonate action.
- To review structure-function correlations and novel molecular targets.
Main Methods:
- Discussion of bisphosphonate bioavailability.
- Examination of structure-function relationships.
- Review of molecular interactions, including nitrogen-containing bisphosphonates with farnesyl pyrophosphate synthase and ApppI formation.
- Analysis of effects on TGF-beta pathway, RANKL/OPG axis, and other novel targets.
Main Results:
- Bisphosphonates interact with farnesyl pyrophosphate synthase, forming cytotoxic ApppI.
- They modulate critical cancer-related pathways like TGF-beta and RANKL/OPG.
- Observed preclinical and clinical activities include effects on apoptosis, proliferation, invasion, immune function, and angiogenesis suppression.
Conclusions:
- Bisphosphonates possess significant anticancer potential through diverse molecular mechanisms.
- Their effects extend to inhibiting tumor growth, metastasis, and angiogenesis.
- Further research into bisphosphonates as anticancer agents is warranted.
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