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Real-time monitoring of cell viability using direct electrical measurement with a patch-clamp microchip

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Abstract

Real-time tagless monitoring of cell viability using patch-clamp microchips is reported and validated by using fluorescence imaging techniques for the first time. Specifically, four human breast cancer cell lines (MDA-MB231, MDA-MB231-brain metastatic subline (abbreviated as MB231-BR), MB231-BR over-expressing HER2 gene (MB231-BR-HER2), and MB231-BR-vector control for the HER2 (MB231-BR-vector)) have been used for these studies. Systematic experiments on these cells found that the seal impedance/resistance of cells captured by the micro-pipettes always decreases during the process when the cell loses its viability, and therefore it is a valid indicator of live or dead cells. Systematic experiments also found that the Mega-seal of patch-clamp microchip is sufficient for monitoring cell viability. Given its simplicity of direct electrical measurement of cells without fluorescence labeling, this technology may provide an efficient technical platform to monitor the drug effects on cells, thereby significantly benefiting high throughput drug screening and discovery process.

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Acknowledgements

This work is partly supported by the NSF grant EECS0845370 and NSF-Pfund-2010 to LQ, by NIH U54 CA149196to SW and NIH U54 CA149196 pilot project to HZ.

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Authors and Affiliations

  1. Institution for Micromanufacturing, Louisiana Tech University, Ruston, LA, USA

    Pushparaj Pathak, Zhongcheng Gong, Tianhua Zhang & Long Que

  2. Department of Systems Medicine and Bioengineering, The Methodist Hospital Research Institute and Departments of Radiology, Neurosciences, Pathology and Laboratory Medicine, The Methodist Hospital, Weill Cornell Medical College, Houston, TX, USA

    Hong Zhao, Fang Nie, Kemi Cui, Zhiyong Wang & Stephen T. C. Wong

Authors
  1. Pushparaj Pathak
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  2. Hong Zhao
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  3. Zhongcheng Gong
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  4. Fang Nie
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  5. Tianhua Zhang
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  6. Kemi Cui
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  7. Zhiyong Wang
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  8. Stephen T. C. Wong
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  9. Long Que
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Correspondence to Long Que.

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Pathak, P., Zhao, H., Gong, Z. et al. Real-time monitoring of cell viability using direct electrical measurement with a patch-clamp microchip. Biomed Microdevices 13, 949–953 (2011). https://doi.org/10.1007/s10544-011-9564-0

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  • DOI: https://doi.org/10.1007/s10544-011-9564-0

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