Patient-Specific 3D Bioprinted Models of Developing Human Heart.

Area of Science:

• Biomedical Engineering
• Developmental Biology
• Cardiovascular Research

Background:

• Heart development relies on intricate cell-microenvironment interactions, poorly understood due to limited experimental models.
• Understanding microenvironmental cues is crucial for studying congenital heart diseases.

Purpose of the Study:

• To create high-fidelity, bioartificial models of the developing human heart using 3D bioprinting and perfusion bioreactors.
• To investigate the role of microenvironmental factors in human heart development.

Main Methods:

• 3D bioprinting of anatomically accurate hydrogel constructs representing the human embryonic heart tube (e-HT) and fetal left ventricle (f-LV).
• Perfusion bioreactor system to simulate physiological conditions.
• Computational and experimental analysis including ultrasound and magnetic resonance imaging.

Main Results:

• Demonstrated comparable hemodynamic flow patterns in 3D bioprinted constructs.
• Confirmed endothelial cell growth and function within e-HT and f-LV models.
• Observed significant variations in cell behavior based on cardiac geometry and flow.

Conclusions:

• Introduced the first anatomically accurate, 3D functional models of the developing human heart.
• This platform allows precise manipulation of microenvironmental factors (flow, geometry) for studying heart development and disease.