Key result
PEDOT:PSS-MWCNT MEAs with electrical stimulation cut impedance ~37-fold and improve iPSC-cardiomyocyte maturation.
Why the study?
Cardiovascular toxicity requires high-throughput and multiparametric assessment of cardiomyocyte function for new drug development safety evaluation.
The PEDOT:PSS-MWCNT-modified MEA platform with integrated electrical stimulation enhances iPSC-cardiomyocyte maturation and provides a robust tool for high-throughput cardiotoxicity screening.
Answers are grounded in this paper and cite their sources.
May enable high-throughput cardiotoxicity screening in drug development; leaves open clinical validation of the MEA platform.
Cardiovascular toxicity is a key safety indicator that has to be evaluated in the process of new drug development. To enable high-throughput and multiparametric assessment of cardiomyocyte function, we developed a 32-well high-throughput microelectrode array (MEA) platform integrated with electrical stimulation. Electrode surface modification with PEDOT:PSS-MWCNT nanocomposites significantly enhanced electrochemical performance and signal acquisition fidelity, reducing electrode impedance by 37-fold compared to unmodified Au electrodes. Notably, the built-in electrical stimulation effectively promoted electrophysiological and structural maturation of human iPSC-cardiomyocytes, demonstrated by a 15.47% increase in sarcomere length and 1.73-fold upregulation of connexin-43 expression. The platform's utility was further validated through cardiotoxicity assessment of two representative ion channel modulators, E-4031 (a selective hERG channel blocker) and verapamil (a clinically used calcium channel blocker). Collectively, this study presents an integrated platform that combines functional monitoring with cellular maturation enhancement, offering a powerful tool for cardiotoxicity screening and disease modeling.
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Liang et al. (2025) studied Cardiovascular toxicity. PEDOT:PSS-MWCNT-modified MEA platform with integrated electrical stimulation vs. Unmodified Au electrodes was evaluated on Electrode impedance and cardiomyocyte maturation (sarcomere length and connexin-43 expression). A PEDOT:PSS-MWCNT-modified MEA platform with electrical stimulation reduced electrode impedance by 37-fold and increased iPSC-cardiomyocyte sarcomere length by 15.47%.
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