The delivery of cells into damaged myocardium induces limited cardiac regeneration due to extensive cell death. In an effort to limit cell death, our lab formulates three-dimensional matrices as a delivery system for cell therapy. Our primary work has been focused on the formation of engineered cardiac tissues (ECTs) from human-induced pluripotent stem cell-derived engineered cardiac cells. However, ECT immaturity hinders ability to fully recover damaged myocardium. Various conditioning regimens such as mechanical stretch and/or electric pacing have been used to activate maturation pathways. To improve ECT maturity, we use non-contacting chronic light stimulation using heterologously expressed light-sensitive channelrhodopsin ion channels. We transduce ECTs with an AAV packaged channelrhodopsin and chronically optically pace (C-OP) ECTs for 1 week above the intrinsic beat rate, resulting in increased ECT electrophysiological properties.
CITATION STYLE
Dwenger, M., Kowalski, W. J., Masumoto, H., Nakane, T., & Keller, B. B. (2021). Chronic optogenetic pacing of human-induced pluripotent stem cell-derived engineered cardiac tissues. In Methods in Molecular Biology (Vol. 2191, pp. 151–169). Humana Press Inc. https://doi.org/10.1007/978-1-0716-0830-2_10
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