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In Vitro Electrophysiological Mapping of Stem Cells

  • Seth Weinberg
  • Elizabeth A. Lipke
  • Leslie Tung
Protocol
Part of the Methods in Molecular Biology book series (MIMB, volume 660)

Abstract

The use of stem cells for cardiac regeneration is a revolutionary, emerging research area. For proper function as replacement tissue, stem cell-derived cardiomyocytes (SC-CMs) must electrically couple with the host cardiac tissue. Electrophysiological mapping techniques, including microelectrode array (MEA) and optical mapping, have been developed to study cardiomyocytes and cardiac cell monolayers, and these can be applied to study stem cells and SC-CMs. MEA recordings take extracellular measurements at numerous points across a small area of cell cultures and are used to assess electrical propagation during cell culture. Optical mapping uses fluorescent dyes to monitor electrophysiological changes in cells, most commonly transmembrane potential and intracellular calcium, and can be easily scaled to areas of different sizes. The materials and methods for MEA and optical mapping are presented here, together with detailed notes on their use, design, and fabrication. We also provide examples of voltage and calcium maps of mouse embryonic stem cell-derived cardiomyocytes (mESC-CMs), obtained in our laboratory using optical mapping techniques.

Key words

Electrophysiology Microelectrode array Optical mapping Embryonic stem cell Cardiomyocyte 

Notes

Acknowledgments

This work was supported by NIH grants R01 HL066239 (L.T.) and T32-HL07581 (A. Shoukas), and grants from the Joint Technion-Hopkins Program for the Biomedical Sciences and Biomedical Engineering (L.T. and L. Gepstein) and from the Maryland Stem Cell Research Fund (L.T.). We thank Dr. Lior Gepstein for training E.L. in his lab on the use of MEAs.

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Seth Weinberg
    • 1
  • Elizabeth A. Lipke
    • 2
  • Leslie Tung
    • 1
  1. 1.Department of Biomedical EngineeringThe Johns Hopkins UniversityBaltimoreUSA
  2. 2.Department of Chemical EngineeringAuburn UniversityAuburnUSA

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