Toward Origami-Inspired In Vitro Cardiac Tissue Models

Area of Science:

• Biomaterials Engineering
• Tissue Engineering
• Regenerative Medicine

Background:

• Engineered cardiac tissue patches are crucial for restoring heart function after injury.
• Current methods often struggle to provide sufficient mechanical and topographical cues for optimal cardiac maturation.
• Cellulose paper scaffolds offer biocompatibility and ease of modification for cardiac tissue engineering.

Purpose of the Study:

• To investigate novel paper-based scaffolds for enhanced cardiac tissue engineering.
• To evaluate the impact of micropatterning and macropatterning (origami folding) on cardiac construct contraction and functionality.
• To demonstrate the potential for integrating microvascular networks within these constructs.

Main Methods:

• Utilized customized cellulose paper scaffolds as cell culture substrates.
• Investigated micropatterning to control cell orientation.
• Developed macropatterns using origami folding to influence construct mechanics.
• Incorporated physiologically differentiated microvascular networks.

Main Results:

• Both micropatterning and origami macropatterning provided mechanical support for cardiac constructs.
• Origami-folded paper scaffolds significantly enhanced mechanical contraction of the cardiac constructs.
• Micropatterning alone did not substantially improve functional parameters.
• Demonstrated proof of principle for combining cardiac constructs with microvascular networks.

Conclusions:

• Origami-based macropatterning is essential for facilitating contraction in paper-based cardiac constructs.
• This approach shows promise for developing structurally organized, contractile cardiac tissues.
• The potential for creating multi-layered cardiac and vascular tissues could improve in vivo cell survival and function.