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Updated: Jul 30, 2025
Anticancer Metal Complexes: Synthesis and Cytotoxicity Evaluation by the MTT Assay
Published on: November 10, 2013
Biological Evaluation of Triorganotin Derivatives as Potential Anticancer Agents
Valeria Stefanizzi1,2, Antonella Minutolo3, Elena Valletta1
1Department of Chemical Science and Technology, University of Rome "Tor Vergata", 00133 Rome, Italy.
Abstract:
Metal-derived platinum complexes are widely used to treat solid tumors. However, systemic toxicity and tumor resistance to these drugs encourage further research into similarly effective compounds. Among others, organotin compounds have been shown to inhibit cell growth and induce cell death and autophagy. Nevertheless, the impact of the ligand structure and mechanisms involved in the toxicity of organotin compounds have not been clarified. In the present study, the biological activities of commercially available bis(tributyltin) oxide and tributyltin chloride, in comparison to those of specially synthesized tributyltin trifluoroacetate (TBT-OCOCF3) and of cisplatin, were assessed using cells with different levels of tumorigenicity. The results show that tributyltins were more cytotoxic than cisplatin in all the tested cell lines. NMR revealed that this was not related to the interaction with DNA but to the inhibition of glucose uptake into the cells. Moreover, highly tumorigenic cells were less susceptible than nontumorigenic cells to the nonunique pattern of death induced by TBT-OCOCF3. Nevertheless, tumorigenic cells became sensitive when cotreated with wortmannin and TBT-OCOCF3, although no concomitant induction of autophagy by the compound was detected. Thus, TBT-OCOCF3 might be the prototype of a family of potential anticancer agents.
Insights
Organotin compounds, like tributyltin trifluoroacetate (TBT-OCOCF3), show greater cytotoxicity than cisplatin against cancer cells. These compounds inhibit glucose uptake, offering a promising new avenue for cancer therapy.
Area of Science:
- Biochemistry
- Medicinal Chemistry
- Oncology
Background:
- Platinum-based drugs are standard chemotherapy for solid tumors but face challenges like toxicity and resistance.
- Organotin compounds exhibit anticancer properties, including cell growth inhibition, cell death induction, and autophagy.
- The precise mechanisms and ligand structure-activity relationships of organotin compounds remain unclear.
Purpose of the Study:
- To compare the cytotoxic effects of different tributyltin compounds against cancer cells.
- To elucidate the mechanism of action of tributyltins, focusing on DNA interaction and glucose uptake.
- To investigate the susceptibility of cells with varying tumorigenicity to tributyltin-induced cell death and explore potential synergistic treatments.
Main Methods:
- Cytotoxicity assays using cell lines with different tumorigenicity levels.
- Nuclear Magnetic Resonance (NMR) spectroscopy to study drug-target interactions.
- Assessment of cell death pathways and autophagy induction.
- Combination therapy studies with wortmannin.
Main Results:
- Tributyltins demonstrated superior cytotoxicity compared to cisplatin across all tested cell lines.
- NMR studies indicated that tributyltins inhibit glucose uptake, not DNA interaction.
- Highly tumorigenic cells showed reduced susceptibility to TBT-OCOCF3-induced cell death.
- Co-treatment with wortmannin sensitized tumorigenic cells to TBT-OCOCF3, without inducing autophagy.
Conclusions:
- Tributyltin compounds possess significant anticancer potential, exceeding that of cisplatin.
- The primary mechanism involves inhibition of cellular glucose uptake.
- TBT-OCOCF3 shows promise as a lead compound for developing novel anticancer agents, potentially effective against resistant tumors.
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