3D Structure and Processing Methods Direct the Biological Attributes of ECM-Based Cardiac Scaffolds

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Cardiovascular Research

Background:

• Cardiac regenerative therapy holds promise for treating myocardial infarction (MI).
• Development of cardiac scaffolds is crucial, but the influence of fabrication processes and structure on scaffold characteristics remains unclear.
• Decellularized porcine cardiac extracellular matrix (pcECM) is a promising biomaterial for cardiac scaffolds.

Purpose of the Study:

• To investigate the effects of 3D structure and processing methods on cardiac scaffolds derived from the same biomaterial (pcECM).
• To evaluate how different fabrication techniques influence scaffold properties and cellular interactions.
• To provide insights for rational scaffold design in cardiac regenerative therapy.

Main Methods:

• Three distinct pcECM scaffolds were fabricated using different production technologies: patch, injectable hydrogel, and electrospun.
• Scaffold composition, micro-morphology, and mechanical properties were analyzed.
• Cell attachment, survival, proliferation, morphology, alignment, and matrix remodeling were assessed on the different scaffolds.

Main Results:

• All three pcECM scaffold types (patch, hydrogel, electrospun) preserved beneficial pcECM properties and showed potential for MI therapy.
• Fabrication processes led to significant differences in mechanical properties, micro-morphology, and composition among scaffolds.
• These differences substantially affected cell attachment, survival, proliferation, morphology, alignment, and matrix remodeling.

Conclusions:

• The fabrication process and resulting 3D structure critically influence cardiac scaffold characteristics and cellular responses.
• Understanding these structure-property-cell relationships is essential for designing effective cardiac scaffolds.
• This knowledge can guide the development of improved cellular or acellular therapeutic strategies for various cardiac conditions.