Details

Autor(en) / Beteiligte

• Rastogi, Sahil Kumar
• Bliley, Jacqueline
• Shiwarski, Daniel J.
• Raghavan, Guruprasad
• Feinberg, Adam W.
• Cohen-Karni, Tzahi

Titel

Graphene Microelectrode Arrays for Electrical and Optical Measurements of Human Stem Cell-Derived Cardiomyocytes

Ist Teil von

• Cellular and molecular bioengineering, 2018-10, Vol.11 (5), p.407-418

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2018

Link zum Volltext

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• Introduction Cell–cell communication plays a pivotal role in biological systems’ coordination and function. Electrical properties have been linked to specification and differentiation of stem cells into targeted progeny, such as neurons and cardiomyocytes. Currently, there is a critical need in developing new ways to complement fluorescent indicators, such as Ca 2+ -sensitive dyes, for direct electrophysiological measurements of cells and tissue. Here, we report a unique transparent and biocompatible graphene-based electrical platform that enables electrical and optical investigation of human embryonic stem cell-derived cardiomyocytes’ (hESC-CMs) intracellular processes and intercellular communication. Methods Graphene, a honeycomb sp 2 hybridized two-dimensional carbon lattice, was synthesized using low pressure chemical vapor deposition system, and was tested for biocompatibility. Au and graphene microelectrode arrays (MEAs) were fabricated using well-established microfabrication methods. Au and graphene MEAs were interfaced with hESC-CMs to perform both optical and electrical recordings. Results Optical imaging and Raman spectroscopy confirmed the presence of monolayer graphene. Viability assay showed biocompatibility of graphene. Electrochemical characterization proved graphene’s functional activity. Nitric acid treatment further enhanced the electrochemical properties of graphene. Graphene electrodes’ transparency enabled both optical and electrical recordings from hESC-CMs. Graphene MEA detected changes in beating frequency and field potential duration upon β-adrenergic receptor agonist treatment. Conclusion The transparent graphene platform enables the investigation of both intracellular and intercellular communication processes and will create new avenues for bidirectional communication (sensing and stimulation) with electrically active tissues and will set the ground for investigations reported diseases such as Alzheimer, Parkinson’s disease and arrhythmias.