Micro-electrode channel guide (µECG) technology: an online method for continuous electrical recording in a human...

Area of Science:

• Biomedical Engineering
• Cardiovascular Research
• Drug Development

Background:

• Cardiac toxicity is a significant cause of drug attrition and withdrawal.
• Existing in vitro models struggle to accurately predict human cardiac toxicity.
• Organs-on-chip offer a promising solution for recapitulating cardiac physiology in vitro.

Purpose of the Study:

• To develop and validate a novel organ-on-chip device for continuous electrophysiological monitoring of human cardiac microtissues.
• To assess the utility of this model for early detection of drug-induced cardiac toxicity.

Main Methods:

• Development of cardiac microtissues using a controlled mechanical environment.
• Integration of micro-electrode coaxial guides for direct, non-destructive electrophysiology studies.
• Continuous acquisition of cardiac field potentials and gene expression analysis of cardiac ion channels.

Main Results:

• Generated human cardiac microtissues demonstrated synchronous spontaneous beating.
• The device enabled multi-point and continuous acquisition of electrophysiological signals.
• Proof-of-concept validation with three drugs indicated the model's potential for toxicity evaluation.

Conclusions:

• The presented organ-on-chip device provides a powerful tool for functional cardiac toxicity assessment.
• This technology facilitates early and accurate detection of cardiotoxic drug candidates.
• The model advances in vitro cardiac modeling for improved drug safety evaluation.