Localized chemical stimulation to micropatterned cells using multiple laminar fluid flows

Area of Science:

• Cardiovascular Science
• Biomedical Engineering
• Cellular Biology

Background:

• Electrically conjugating cardiomyocytes are crucial for heart function.
• Understanding single-cell network dynamics is key to cardiac research.
• Precise control over cellular environments is needed to study cell behavior.

Purpose of the Study:

• To develop a method for creating single-cell cardiomyocyte patterns.
• To investigate cellular responses to localized chemical stimulation.
• To demonstrate controlled pulsatility in patterned cardiomyocyte networks.

Main Methods:

• Microcontact printing (microCP) was used to create micropatterns of cardiomyocytes on a single-cell level.
• Localized chemical stimulation was applied using multiple laminar flows.
• 1-octanol was used as the chemical agent to inactivate specific myocyte areas.

Main Results:

• Patterned cardiomyocytes retained spontaneous and synchronous pulsatility in active areas.
• Localized 1-octanol application successfully inactivated specific regions of the myocyte patterns.
• The study demonstrated controlled cellular responses within a well-defined single-cell network on a chip.

Conclusions:

• Microcontact printing and laminar flow systems enable precise control over cardiomyocyte networks.
• This approach allows for the study of cellular responses in isolated, patterned networks.
• The findings provide a foundation for understanding complex cardiac tissue behavior at the cellular level.