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Related Experiment Video

Updated: May 15, 2025

Fabrication of 3D Cardiac Microtissue Arrays using Human iPSC-Derived Cardiomyocytes, Cardiac Fibroblasts, and Endothelial Cells
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Soft 3D Bioelectrodes for Intraorganoid Signal Monitoring in Cardiac Models.

Young-Geun Park1, Sumin Kim2, Sungjin Min3,4

  • 1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

Nano Letters
|April 9, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a soft 3D bioelectrode platform using 3D printing for continuous internal monitoring of organoids. This technology enables real-time electrocardiogram (ECG) recordings, advancing organoid research and drug screening.

Keywords:
3D printingBioelectrodesCardiac organoidsLiquid metals

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Area of Science:

  • Biomedical Engineering
  • Organoid Technology
  • Bioelectronics

Background:

  • Current organoid research is limited by methods that only capture peripheral signals, hindering the study of internal organoid dynamics.
  • Continuous monitoring of internal physiological activities in three-dimensional (3D) organoids is crucial for advancing organoid-based research and applications.
  • There is a need for advanced tools that can reliably record signals from within organoids without causing damage.

Purpose of the Study:

  • To introduce a novel soft 3D bioelectrode platform for continuous intraorganoid signal monitoring.
  • To demonstrate the platform's adaptability to various organoid structures through customizable geometric parameters.
  • To validate the platform's capability for stable and reliable signal recording in dynamic conditions and its utility in drug screening.

Main Methods:

  • Fabrication of soft 3D bioelectrodes using 3D printing with liquid metal.
  • Customization of electrode geometric parameters (height, diameter) for organoid integration.
  • Utilizing an array configuration for simultaneous electrocardiogram (ECG) recordings from multiple organoids.
  • Testing the platform with cardiac organoids to assess signal stability during contractions and displacements.

Main Results:

  • The soft 3D bioelectrode platform enables continuous monitoring of internal organoid signals.
  • Electrodes exhibit tissue-comparable softness, minimizing damage and ensuring stable recording interfaces.
  • The platform successfully recorded real-time, drug-induced electrocardiogram (ECG) responses from 32 organoids simultaneously.
  • Demonstrated scalability and reliability for monitoring dynamic physiological activities within organoids.

Conclusions:

  • The developed soft 3D bioelectrode platform provides a breakthrough for internal organoid monitoring.
  • This technology overcomes limitations of conventional surface-based methods, offering deeper insights into organoid physiology.
  • The platform is a scalable solution with significant potential for high-throughput drug screening and advancing organoid-based research.