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Quantifying Early Electromechanical Integration of Cardiomyocytes Using a Minimalist PCL Nanofiber Platform.
Vitalii Dzhabrailov1,2, Elena Turchaninova1,2, Daria V Kononova2
1E. Meshalkin National Medical Research Center of the Ministry of Health of the Russian Federation, 630055 Novosibirsk, Russia.
Polymers
|January 10, 2026
Summary
Grafted cardiomyocytes initially struggle to connect with host tissue, showing significantly reduced electrical signal transmission. This study quantifies this early integration deficit, crucial for improving cardiac cell therapy safety and efficacy.
Area of Science:
- Biomedical Engineering
- Cardiovascular Research
- Regenerative Medicine
Background:
- Cardiac cell therapy faces challenges with unpredictable electrophysiological integration of grafted cells.
- Existing models do not adequately represent the earliest stages of functional coupling between grafted and host cells.
- Understanding initial graft-host electrical communication is vital for therapeutic success and preventing arrhythmias.
Purpose of the Study:
- To model and quantitatively assess the earliest stages of electrophysiological integration at the graft-host interface.
- To investigate the efficiency of excitation wave transmission across nascent intercellular contacts.
- To establish the functional deficit in newly formed connections within the first few hours post-grafting.
Main Methods:
- Utilized a bioengineering platform with cardiomyocytes on electrospun polycaprolactone (PCL) nanofibers to mimic the graft-host interface.
- Employed high-speed optical mapping combined with a custom SUPPORT neural network for real-time analysis.
- Quantified the efficiency of electrical signal conduction across initial cell-cell contacts.
Main Results:
- Demonstrated that initial intercellular connections are 39-44 times less effective than mature contacts within the first 3 hours.
- Observed partial synchronization (46%) of grafted cells, explained by the low efficiency of nascent connections.
- Provided the first direct quantitative measurement of the functional deficit during early graft integration.
Conclusions:
- Simple polymer nanofibers can serve as a scaffold to facilitate initial cardiomyocyte integration.
- The identified functional deficit in early integration is a key factor limiting therapeutic efficacy and potentially causing arrhythmias.
- This research offers a strategy to deconstruct and control cell integration for safer and more effective cardiac cell therapies.
