Centimeter-Scale Alignment of Fibrillar Proteins Utilizing Viscous Polymers for Tissue Engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Extracellular matrix (ECM) organization is crucial for tissue function, with aligned ECM fibrils guiding cellular alignment in various tissues.
• Current ECM alignment techniques are insufficient for creating tissue-scale scaffolds needed for disease modeling and regenerative medicine.

Purpose of the Study:

• To develop a novel method for achieving centimeter-scale alignment of fibrillar ECM.
• To create tissue-scale scaffolds with aligned ECM and cells for biomedical applications.

Main Methods:

• Leveraged strong dipole-dipole interactions between viscous long-chain polymers to corral fibrillar ECM proteins during hydrogel formation.
• Mixed viscous long-chain polymers with fibrillar ECM solutions to achieve large-scale alignment.
• Validated the method's generalizability across different polymers and ECM proteins.

Main Results:

• Successfully aligned fibrillar ECM at the centimeter scale.
• Demonstrated robust alignment of both ECM and encapsulated cells.
• Confirmed the safety and high viability of encapsulated cells, comparable to controls.
• Showcased the method's generalizability across various polymers and ECM proteins.

Conclusions:

• A new, customizable method for creating tissue scaffolds with aligned ECM fibrils and cells has been developed.
• This technique utilizes viscous long-chain polymers and ECM proteins, offering a versatile approach for regenerative medicine and disease modeling.
• The method provides a scalable solution for fabricating centimeter-scale aligned ECM scaffolds.