Engineered cardiac organoid chambers: toward a functional biological model ventricle

Area of Science:

• Biomedical Engineering
• Cardiovascular Research
• Tissue Engineering

Background:

• Traditional engineered cardiac tissues lack the ability to evaluate global heart function.
• Assessing pressure-volume relationships is crucial for understanding cardiac contractile function.

Purpose of the Study:

• To introduce a novel, fully biological engineered cardiac organoid system.
• To create a biomimetic cardiac niche for studying cardiac pump function and disease models.

Main Methods:

• Development of self-beating, fluid-ejecting cardiac organoids.
• Assessment of pressure-volume dynamics, residual stress, and Frank-Starling mechanism.
• Creation of a myocardial infarction model using local cryoinjury.

Main Results:

• Engineered cardiac organoids demonstrated spontaneous beating, pressure development, and fluid ejection.
• The organoids exhibited a functional Frank-Starling mechanism and generated positive stroke work.
• Regional variations in pump function were observed after cryoinjury, creating a viable myocardial infarction model.

Conclusions:

• The developed cardiac organoid chamber culture system provides a controllable and flexible platform.
• This system enables direct evaluation of cardiac pressure-volume characteristics and wall stress.
• It is suitable for high-throughput and long-term investigations of cardiac pump function and disease modeling.