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Inductively coupled plasma mass spectrometry for the determination of platinum accumulation in human non-small cell lung cancer cell lines

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Abstract

Background

Inductively coupled plasma mass spectrometry (ICP-MS) has been used to detect trace elements in biologic materials. In this study, we evaluated its application for the determination of cisplatin (cis-diamminedichloroplatinum) accumulation in human non-small cell lung cancer cell lines.

Methods

We used 2 squamous lung cancer cell lines (EBC-1 and LK-2), and 4 adenocarcinoma cell lines (ABC-1, RERF-LC-MS, A549, and its cisplatin-resistant subline A549/CDDP). The cells were incubated in 10 ppb cisplatin for 2 hours. After the incubation, cells were digested with nitric acid at 120°C, diluted with filtered water, and nebulized into an ICP-MS machine. A calibration curve was obtained using 5 standard platinum solutions, and cellular platinum concentrations were corrected by protein. Chemosensitivity to cisplatin was determined using the XTT assay.

Results

The cell-number detection limit for the determination of cellular platinum was 5.0×104 cells for 10 ppb cisplatin. No significant correlation was observed between cisplatin sensitivity and cellular platinum accumulation among these 6 cell lines, but an inverse correlation was observed between A549/CDDP and its parental line.

Conclusion

This study indicates that ICP-MS can be applied to the determination of platinum accumulation in human non-small cell lung cancer cell lines.

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Hanada, T., Isobe, H., Saitoh, T. et al. Inductively coupled plasma mass spectrometry for the determination of platinum accumulation in human non-small cell lung cancer cell lines. Int J Clin Oncol 3, 98–101 (1998). https://doi.org/10.1007/BF02492855

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  • DOI: https://doi.org/10.1007/BF02492855

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