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High throughput and automatic colony formation assay based on impedance measurement technique

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Abstract

To predict the response of in vivo tumors, in vitro culture of cell colonies was suggested to be a standard assay to achieve high clinical relevance. To describe the responses of cell colonies, the most widely used quantification method is to count the number and size of cell colonies under microscope. That makes the colony formation assay infeasible to be high throughput and automated. In this work, in situ analysis of cell colonies suspended in soft hydrogel was developed based on impedance measurement technique. Cell colonies cultured between a pair of parallel plate electrodes were successfully analyzed by coating a layer of base hydrogel on one side of electrode. Real-time and label-free monitoring of cell colonies was realized during the culture course. Impedance magnitude and phase angle respectively represented the summation effect of colony responses and size of colonies. In addition, dynamic response of drug-treated colonies was demonstrated. High throughput and automatic colony formation assay was realized to facilitate more objective assessments in cancer research.

High throughput and automatic colony formation assay was realized by in situ impedimetric analysis across a pair of parallel plate electrodes in a culture chamber. Cell colonies suspended in soft hydrogel were cultured under the tested substance and their dynamic response was represented by impedance data.

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Acknowledgements

This work was supported by Ministry of Science and Technology, Taiwan (Project no. MOST103-2221-E-182-004-MY3) and Chang Gung Memorial Hospital, Linkou Branch, Taiwan (Project no. CMRPG3C1921 and BMRPC05).

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Authors and Affiliations

  1. Graduate Institute of Medical Mechatronics, Chang Gung University, 259 Wen-Hua 1st Road, Kweishan, Taoyuan, 333, Taiwan, Republic of China

    Kin Fong Lei & Chich-Hao Kao

  2. Department of Mechanical Engineering, Chang Gung University, Taoyuan, 333, Taiwan, Republic of China

    Kin Fong Lei

  3. Department of Radiation Oncology, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fuxing St., Taoyuan, 333, Taiwan, Republic of China

    Kin Fong Lei & Ngan-Ming Tsang

  4. School of Traditional Chinese Medicine, Chang Gung University, 259 Wen-Hua 1st Road, Kweishan, Taoyuan, 333, Taiwan, Republic of China

    Ngan-Ming Tsang

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  1. Kin Fong Lei
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  2. Chich-Hao Kao
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  3. Ngan-Ming Tsang
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Correspondence to Kin Fong Lei or Ngan-Ming Tsang.

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Lei, K.F., Kao, CH. & Tsang, NM. High throughput and automatic colony formation assay based on impedance measurement technique. Anal Bioanal Chem 409, 3271–3277 (2017). https://doi.org/10.1007/s00216-017-0270-5

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  • DOI: https://doi.org/10.1007/s00216-017-0270-5

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