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2011 - Automated Patch Clamp on mESC-Derived Cardiomyocytes for Cardiotoxicity Prediction

icon pl   Patchliner and   icon pap   Port-a-Patch publication in Journal of Biological Chemistry (2011)

Authors: 
Stoelzle S., Haythornthwaite A., Kettenhofen R., Kolossov E., Bohlen H., George M., Brüggemann A., Fertig N.

 

Journal: 
Journal of Biomolecular Screening (2011) 16(8):910-916


Abstract: 

Cardiovascular side effects are critical in drug development and have frequently led to late-stage project terminations or even drug withdrawal from the market. Physiologically relevant and predictive assays for cardiotoxicity are hence strongly demanded by the pharmaceutical industry. To identify a potential impact of test compounds on ventricular repolarization, typically a variety of ion channels in diverse heterologously expressing cells have to be investigated. Similar to primary cells, in vitro–generated stem cell–derived cardiomyocytes simultaneously express cardiac ion channels. Thus, they more accurately represent the native situation compared with cell lines overexpressing only a single type of ion channel. The aim of this study was to determine if stem cell–derived cardiomyocytes are suited for use in an automated patch clamp system. The authors show recordings of cardiac ion currents as well as action potential recordings in readily available stem cell–derived cardiomyocytes. Besides monitoring inhibitory effects of reference compounds on typical cardiac ion currents, the authors revealed for the first time drug-induced modulation of cardiac action potentials in an automated patch clamp system. The combination of an in vitro cardiac cell model with higher throughput patch clamp screening technology allows for a cost-effective cardiotoxicity prediction in a physiologically relevant cell system.


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