Direct Contraction Force Measurements of Engineered Cardiac Tissue Constructs With Inotropic Drug Exposure

Area of Science:

• Cardiovascular Research
• Biomedical Engineering
• Pharmacology

Background:

• Cardiac contractility is vital for maintaining blood perfusion, and alterations can be fatal.
• Reliable methods for testing drug effects on cardiac contractility are crucial for drug discovery.
• Existing methods may not fully capture the nuances of drug-induced inotropic changes.

Purpose of the Study:

• To develop and validate a novel system for measuring cardiac contraction force.
• To assess the system's capability in detecting drug-induced inotropic effects.
• To evaluate the potential of this system for pharmaceutical research and development.

Main Methods:

• Development of a dual-axis piezoelectric force sensor.
• Creation of human cell-based vascularized cardiac tissue constructs.
• Measurement of cardiac contraction force in response to known inotropic agents.

Main Results:

• The developed system successfully measured cardiac contraction forces.
• Both positive and negative inotropic effects induced by various drugs were detected.
• Dose-dependent responses to inotropic compounds were observed.

Conclusions:

• The cardiac contraction force measurement system, integrating a piezoelectric sensor and human cardiac tissue, is effective.
• This system demonstrates significant potential for evaluating inotropic drug effects in a preclinical setting.
• The technology offers a promising platform for advancing cardiovascular drug discovery.