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Published on: September 9, 2011
Activity of nitrogen-containing and non-nitrogen-containing bisphosphonates on tumor cell lines
Yonghui Zhang1, Annette Leon, Yongcheng Song
1Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Abstract:
We synthesized and tested three series of bisphosphonates for their activity in inhibiting the growth of three human tumor cell lines: MCF-7 (breast), NCI-H460 (lung), and SF-268 (CNS). The first series of compounds consisted of 49 nitrogen-containing bisphosphonates, the most active species being a tetrakispivaloyloxymethyl (POM) ester, having an (average) IC(50) of 6.8 microM. The second series of compounds consisted of nine terphenylbisphosphonates, the most active species also being a POM ester, having an IC(50) of 2.2 microM. The third series of compounds consisted of seven halogen or cyanophenylbisphosphonates, the most active species again being a POM ester, having an IC(50) of 500 nM. Taken together, these results are of interest because they show that bisphosphonate esters can have potent activity against a variety of tumor cell lines, with the most active terphenyl- and halophenyl-containing species having IC(50) values approximately 10-40x lower than the most potent commercially available bisphosphonates.
Insights
New bisphosphonate esters show potent anticancer activity. These compounds, particularly terphenyl- and halophenyl-containing species, are significantly more effective than current bisphosphonates against breast, lung, and CNS tumor cell lines.
Area of Science:
- Medicinal Chemistry
- Oncology
- Pharmacology
Background:
- Bisphosphonates are a class of drugs primarily used to treat bone diseases.
- Exploring novel bisphosphonate derivatives for anticancer applications is an active area of research.
Purpose of the Study:
- To synthesize and evaluate the anticancer activity of novel bisphosphonate ester series.
- To compare the efficacy of these new compounds against human breast, lung, and CNS tumor cell lines.
Main Methods:
- Synthesis of three distinct series of bisphosphonate compounds.
- In vitro testing of compound efficacy using cell viability assays (IC50 determination).
- Evaluation against MCF-7 (breast), NCI-H460 (lung), and SF-268 (CNS) human tumor cell lines.
Main Results:
- A tetrakispivaloyloxymethyl (POM) ester of a nitrogen-containing bisphosphonate showed an average IC50 of 6.8 microM.
- A POM ester of a terphenylbisphosphonate exhibited an IC50 of 2.2 microM.
- A POM ester of a halogen or cyanophenylbisphosphonate demonstrated the highest potency with an IC50 of 500 nM, outperforming existing bisphosphonates.
Conclusions:
- Bisphosphonate esters can exhibit significant inhibitory activity against diverse human tumor cell lines.
- Terphenyl- and halophenyl-containing bisphosphonate esters show promising potent anticancer effects.
- These novel bisphosphonate esters represent potential leads for developing new anticancer therapeutics.
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