Abstract
In this report, we have tested the cytotoxicity of two organotin (OT) compounds by flow cytometry on a panel of immortalized cancer cell lines of human and murine origin. Although the OT compounds exhibited varying levels of cytotoxicity, diphenylmethyltin chloride was more toxic than 1,4-bis (diphenylchlorostannyl)p-xylene on all cell lines tested. The OT compounds were found to be highly cytotoxic to lymphoma cell lines with lower toxicity toward the HeLa cervical cancer cell line. In order to discern the mechanism by which cell death was induced, additional experiments were conducted to monitor characteristic changes consistent with apoptosis and/or necrosis. Cell lines treated with the experimental compounds indicated that there was no consistent mode of cell death induction. However, both compounds induced apoptosis in the pro-B lymphocyte cell line, NFS-70. The work presented here also demonstrates that the two OT compounds possess selective cytotoxicity against distinct transformed cell lines.
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Abbreviations
- ATCC:
-
American Type Culture Collection
- Bis(Ph2SnCl)Xylene:
-
1,4-Bis (diphenylchlorostannyl)p-xylene
- CC50 :
-
Concentration that results in 50% cytotoxicity
- DBT:
-
Di-n-butyltin chloride
- DMEM:
-
Dulbecco’s modified Eagle medium
- DMSO:
-
Dimethyl sulfoxide
- DPMT:
-
Diphenylmethyltin chloride
- EDTA:
-
Ethylenediaminetetraacetic acid
- FACS:
-
Fluorescence-activated cell sorter
- FITC:
-
Fluorescein isothiocyanate
- H2O2 :
-
Hydrogen peroxide
- ID50 :
-
The 50% inhibitory dose
- IL-2:
-
Interleukin-2
- NK:
-
Natural killer
- OT:
-
Organotin
- PBS:
-
Phosphate buffered saline
- PI:
-
Propidium iodide
- PS:
-
Phosphatidylserine
- PVC:
-
Polyvinyl chloride
- ROS:
-
Reactive oxygen species
- RPMI:
-
Roswell Park Memorial Institute
- TBT:
-
Tri-n-butyltin chloride
- TMT:
-
Trimethyltin
- TPT:
-
Triphenyltin
- TPT-CuCl2 :
-
Triphenyltin benzimidazolethiol copper chloride
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Acknowledgments
The authors thank Dr. S. Nagy for the generous gift of the Kit 225 cell line and to the staff of the UTEP’s Cell Culture and High Throughput Screening Core Facility for services and facilities provided. This work was supported by grant 5G12RR008124 to the Border Biomedical Research Center, granted to the University of Texas at El Paso from the National Center for Research Resources of the NIH. Y.P.C. was supported by the NIH-MARC*USTAR (5T34GM008048-25) and RISE (R25 GM069621-07) programs. Also, the authors thank Drs. Julia Bader for statistic analysis and Carolina Lema for critically reading the manuscript and help with organizing the bibliography.
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Varela-Ramirez, A., Costanzo, M., Carrasco, Y.P. et al. Cytotoxic effects of two organotin compounds and their mode of inflicting cell death on four mammalian cancer cells. Cell Biol Toxicol 27, 159–168 (2011). https://doi.org/10.1007/s10565-010-9178-y
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DOI: https://doi.org/10.1007/s10565-010-9178-y