Bioimpedance monitoring of 3D cell culturing-Complementary electrode configurations for enhanced spatial sensitivity

Chiara Canali, Arto Heiskanen, Haseena Bashir Muhammad, Per Høyum, Fred-Johan Pettersen, Mette Hemmingsen, Anders Wolff, Martin Dufva, Orjan Grøttem Martinsen, Jenny Emnéus

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A bioimpedance platform is presented as a promising tool for non-invasive real-time monitoring of the entire process of three-dimensional (3D) cell culturing in a hydrogel scaffold. In this study, the dynamics involved in the whole process of 3D cell culturing, starting from polymerisation of a bare 3D gelatin scaffold, to human mesenchymal stem cell (MSC) encapsulation and proliferation, was monitored over time. The platform consists of a large rectangular culture chamber with four embedded vertical gold plate electrodes that were exploited in two- and three terminal (2T and 3T) measurement configurations. By switching between the different combinations of electrode couples, it was possible to generate a multiplexing-like approach, which allowed for collecting spatially distributed information within the 3D space. Computational finite element (FE) analysis and electrochemical impedance spectroscopic (EIS) characterisation were used to determine the configurations' sensitivity field localisation. The 2T setup gives insight into the interfacial phenomena at both electrode surfaces and covers the central part of the 3D cell culture volume, while the four 3T modes provide focus on the dynamics at the corners of the 3D culture chamber. By combining a number of electrode configurations, complementary spatially distributed information on a large 3D cell culture can be obtained with maximised sensitivity in the entire 3D space. The experimental results show that cell proliferation can be monitored within the tested biomimetic environment, paving the way to further developments in bioimpedance tracking of 3D cell cultures and tissue engineering.
    Original languageEnglish
    JournalBiosensors and Bioelectronics
    Volume63
    Pages (from-to)72-79
    Number of pages8
    ISSN0956-5663
    DOIs
    Publication statusPublished - 2015

    Keywords

    • Bioimpedance
    • 3D cell culture
    • Gelatin scaffold
    • Multiplexed measurements
    • Three-terminal impedance
    • Sensitivity field distribution

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