Lead Scientist
CurrentWe have developed a user friendly plug and play Dynamic Clamp system, the Cybercyte, that allows for the integration of electronically-generated ion channel currents in real time into signals recorded from cardiomyocytes, neurons and common cell lines. We use both Markov models and Hodgkin-Huxley models, as needed. We can electronically express a wide range of currents, including INa, ICa, IKS, IK1 and IHERG. One of our applications is to use the Cybercyte to record stable cardiac action potentials from Induced pluripotent adult stem cell-derived cardiac myocytes (iPSCD_CM). iPSCD-CMs are limited in studying integrated cardiac action potentials since they lack the IK1 potassium channel. The Cybercyte electronically expresses IK1, which restores the physiological diastolic potential enabling detailed quantitative analysis of iPSCD_CM action potentials. We further improved the accuracy and efficiency of recording cardiac action potentials using the Cybercyte to correct in real-time increases in passive leak that routinely occur in patch clamp electrophysiology recording. Using the Cybercyte we provide early-stage cardiotoxicity screening of lead candidates for the pharmaceutical industry in accordance with the FDA's Comprehensive In Vitro Proarrhythmia Assay (CiPA) initiative.