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Related Experiment Video

Updated: Jul 6, 2025

Electromechanical Assessment of Optogenetically Modulated Cardiomyocyte Activity
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An Integrated Optogenetic and Bioelectronic Platform for Regulating Cardiomyocyte Function.

Olurotimi A Bolonduro1, Zijing Chen2, Yan-Ru Lai1

  • 1Department of Biomedical Engineering, Tufts University.

Biorxiv : the Preprint Server for Biology
|January 3, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed an optogenetic and bioelectronic platform to control and monitor heart cell (cardiomyocyte) function. This system uses blue light to adjust heart cell beating rates, offering new possibilities for cardiac regulation and arrhythmia studies.

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Area of Science:

  • Cardiology
  • Bioelectronics
  • Optogenetics

Background:

  • Understanding and controlling cardiomyocyte function is crucial for cardiac research and treating heart conditions.
  • Existing methods for monitoring and modulating cardiomyocyte activity often lack integration and long-term stability.

Approach:

  • Developed an integrated optogenetic and bioelectronic platform for in vitro cardiomyocyte studies.
  • Utilized photoactivatable adenylyl cyclase (bPAC) for light-induced, dose-dependent control of cardiomyocyte beat rate.
  • Employed a multi-electrode array (MEA) for real-time electrophysiological monitoring at 32 locations.

Key Points:

  • Blue light activation of bPAC increased cardiomyocyte beat rate by approximately 14% within 20-25 minutes.
  • The induced increase in beat rate was stable for over 2 hours and could be reversibly controlled.
  • Beat rate modulation showed a monotonic response to light irradiation intensity.

Conclusions:

  • The integrated platform enables stable, long-term modulation and monitoring of cardiomyocyte function.
  • This technology advances bioelectronic medicine, enabling closed-loop systems for cardiac regulation.
  • Potential applications include arrhythmia diagnosis and therapeutic interventions.